Artificial Intelligence & Information Analysis

**S. Papadopoulos**,**I. Mademlis**and**I.Pitas**,**"Neural vision-based semantic 3D world modeling"**,*Proceedings of the IEEE/CVF Winter Conference on Applications of Computer Vision*, pp. 181--190, 2021.**A. Toufa**and**C.Kotropoulos**,**"Digit recognition applied to reconstructed audio signals using deep learning"**,*in Proc. 2020 Int. Conf. Pattern Recognition*, January 10-15, 2021.**I. Karakostas**,**V. Mygdalis**and**I.Pitas**,**"Adversarial Optimization Scheme for Online Tracking Model Adaptation in Autonomous Systems"**,*Special Session Autonomous Vehicle Vision in IEEE International Conference on Image Processing (ICIP)*, 19-22 September, 2021.**M. Kaseris**,**I. Mademlis**and**I.Pitas**,**"Adversarial Unsupervised Video Summarization Augmented With Dictionary Loss"**,*Proceedings of the IEEE International Conference on Image Processing (ICIP)*, 2021.**S. Papadopoulos**,**I. Mademlis**and**I.Pitas**,**"Semantic Image Segmentation Guided By Scene Geometry"**,*Proceedings of the IEEE International Conference on Autonomous Systems (ICAS)*, 2021.**C. Papaioannidis**,**I. Mademlis**and**I.Pitas**,**"Autonomous UAV safety by visual human crowd detection using multi-task Deep Neural Networks"**,*Proceedings of the IEEE International Conference on Robotics and Automation (ICRA)*, 2021.**F. Patrona**,**I. Mademlis**and**I.Pitas**,**"An Overview of Hand Gesture Languages for Autonomous UAV Handling"**,*Proceedings of the Aerial Robotic Systems Physically Interacting with the Environment Workshop (AIRPHARO)*, 2021.**F. Patrona**,**I. Mademlis**and**I.Pitas**,**"Self-Supervised Convolutional Neural Networks for Fast Gesture Recognition in Human-Robot Interaction"**,*Proceedings of the IEEE International Conference on Information and Automation for Sustainability (ICIAfS)*, 2021.**C. Papaioannidis**,**D. Makrygiannis**,**I. Mademlis**and**I.Pitas**,**"Learning Fast and Robust Gesture Recognition"**,*Proceedings of the EURASIP European Conference on Signal Processing (EUSIPCO)*, 2021.**D. Makrygiannis**,**C. Papaioannidis**,**I. Mademlis**and**I.Pitas**,**"Optimal video handling in on-line hand gesture recognition using Deep Neural Networks"**,*Proceedings of the IEEE Series of Symposiums on Computational Intelligence (SSCI)*, 2021.**G. Voulgaris**,**I. Mademlis**and**I.Pitas**,**"Procedural Terrain Generation Using Generative Adversarial Networks"**,*Proceedings of the EURASIP European Conference on Signal Processing (EUSIPCO)*, 2021.**C. Papaioannidis**and**I.Pitas**,**"Learning Robust Features for 3D Object Pose Estimation"**,*Proceedings of the IEEE International Conference on Autonomous Systems (ICAS)*, 2021.**I.Pitas**,**"Optimal multidimensional cyclic convolution algorithms for deep learning and computer vision applications"**,*Proceedings of the IEEE International Conference on Autonomous Systems (ICAS)*, 2021.**R. Fan**,**J. Cheng**,**Y. Yu**,**J. Deng**,**G. Giakos**and**I.Pitas**,**"Long-Awaited Next-Generation Road Damage Detection and Localization System is Finally Here"**,*Proceedings of the EURASIP European Signal Processing Conference (EUSIPCO)*, 2021.**V. Mygdalis**,**A.Tefas**and**I.Pitas**,**"Introducing K-Anonymity Principles to Adversarial Attacks for Privacy Protection in Image Classification Problems"**,*Proceedings of the IEEE International Workshop on Machine Learning for Signal Processing (MLSP)*, 2021.**C. Symeonidis**,**E. Kakaletsis**,**I. Mademlis**,**N.Nikolaidis**,**A.Tefas**and**I.Pitas**,**"Vision-based UAV Safe Landing exploiting Lightweight Deep Neural Networks"**,*Proceedings of the International Conference on Image and Graphics Processing (ICIGP), ACM*, 2021.

**M. Krestenitis**,**N. Passalis**,**A.Iosifidis**,**M. Gabbouj**and**A.Tefas**,**"Human Action Recognition using Recurrent Bag-of-Features Pooling",***25th International Conference on Pattern Recognition*, 2020.**E. Patsiouras**,**A.Tefas**and**I.Pitas**,**"Few-shot Image Recognition for UAV Sports Cinematography",***Computer Vision and Pattern Recognition Workshops*, pp.965-969, 2020.**F. Patrona**,**P. Nousi**,**I. Mademlis**,**A.Tefas**and**I.Pitas**,**"Visual Object Detection For Autonomous UAV Cinematography"**,*Proceedings of the Northern Lights Deep Learning Workshop*, 2020.**N. Passalis**and**A.Tefas**,**"Leveraging Active Perception for Improving Embedding-based Deep Face Recognition",***22th IEEE International Workshop on Multimedia Signal Processing*, 2020.**T. Bozinis**,**N. Passalis**and**A.Tefas**,**"Improving Visual Question Answering using Active Perception on Static Images",***25th International Conference on Pattern Recognition*, 2020.**N. Passalis**,**J. Raitoharju**,**M. Gabbouj**and**A.Tefas**,**"Efficient Adaptive Inference leveraging Bag-of-Features-based Early Exits",***22th IEEE International Workshop on Multimedia Signal Processing*, 2020.**P. Pegios**,**N. Passalis**and**A.Tefas**,**"Improving Universal Style Transfer using Sub-style Decomposition",***11th Hellenic Conference on Artificial Intelligence*, 2020.**M. Tzelepi**and**A.Tefas**,**"Quadratic Mutual Information Regularization in Real-Time Deep CNN Models",***30th IEEE International Workshop on Machine Learning for Signal Processing (MLSP)*, 2020.**C. Nasioutzikis**,**M. Tzelepi**and**A.Tefas**,**"Deep Hashing Regularization Towards Hamming Space Retrieval",***11th Hellenic Conference on Artificial Intelligence*, 2020.**N. Passalis**,**M. Tzelepi**and**A.Tefas**,**"Multilayer Probabilistic Knowledge Transfer for Learning Image Representations",***IEEE International Symposium on Circuits and Systems (ISCAS)*, 2020.**N. Passalis**,**G. Mourgias-Alexandris**,**N. Pleros**and**A.Tefas**,**"Adaptive Initialization for Recurrent Photonic Networks using Sigmoidal Activations",***IEEE International Symposiumon Circuits and Systems (ISCAS)*, 2020.**G. Mourgias-Alexandris**,**G. Dabos**,**N. Passalis**,**A.Tefas**,**A. Totovic**and**N. Pleros**,**"All-optical recurrent neural network with sigmoid activation function",***Optical Fiber Communication Conference*, 2020.**G. Mourgias-Alexandris**,**N. Passalis**,**A. Totovic**,**G. Dabos**,**A.Tefas**and**N. Pleros**,**"Neuromorphic computing through photonic integrated circuits",***Smart Photonic and Optoelectronic Integrated Circuits XXII*, 2020.**M. Kirtas**,**K. Tsampazis**,**N. Passalis**and**A.Tefas**,**"A Webots-based Deep Reinforcement Learning Framework for Robotics"**,*International Conference on Artificial Intelligence Applications and Innovations*, 2020.**A. Tzimas**,**N. Passalis**and**A.Tefas**,**"Leveraging Deep Reinforcement Learning for Active Shooting under Open-World Setting"**,*IEEE International Conference on Multimedia and Expo*, 2020.**N. Passalis**,**M. Tzelepi**and**A.Tefas**,**"Heterogeneous Knowledge Distillation using Information Flow Modeling"**,*IEEE Conference on Computer Vision and Pattern Recognition*, 2020.**E. I. E. Almaloglou**,**S. Geronikolou**,**G. Chroussos**and**C.Kotropoulos**,**"Design and validation of a new diagnostic tool for the differentiation of pathological voices in Parkinsonian patients"**,*In Proc. 4th IEEE World Congress Genetics, Geriatrics, and Neurodegenerative Diseases (GeNeDis 2020)*, October 8-11, 2020.**N. Bartziokas**,**T. Mavropoulos**and**C.Kotropoulos**,**"elNER: A dataset for Greek named entity recognition"**,*In Proc. 11th Hellenic Conf. Artificial Intelligence (SETN 2020)*, pp. 160-167, September 2-4, 2020.**E. Kakaletsis**,**I. Mademlis**,**N.Nikolaidis**and**I.Pitas**,**"Bayesian Fusion of Multi-view Human Crowd Detections for Autonomous UAV Fleet Safety"**,*28th European Signal Processing Conference (EUSIPCO 2020)*, 18-22 January 2021, 2020.

**I. Tsingalis**and**C.Kotropoulos**,**"A simple algorithm for non-negative sparse principal component analysis"**,*n Proc. 2019 IEEE Int. Conf. Image Processing*, pp. 2075-2079, September 22-25, 2019.**I. Mademlis**,**A.Tefas**and**I.Pitas**,**"Greedy Salient Dictionary Learning for Activity Video Summarization"**,*Proceedings of the International Conference on MultiMedia Modeling (MMM)*, 2019.**E. Kakaletsis**,**M. Tzelepi**,**P. I. Kaplanoglou**,**C. Symeonidis**,**N.Nikolaidis**,**A.Tefas**and**I.Pitas**,**"Semantic Map Annotation Through UAV Video Analysis Using Deep Learning Models in ROS"**,*Proceedings of the International Conference on MultiMedia Modeling (MMM)*, 2019.**I. Karakostas**,**I. Mademlis**,**N.Nikolaidis**and**I.Pitas**,**"Shot Type Feasibility in Autonomous UAV Cinematography"**,*Proceedings of the IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)*, 2019.**P. Nousi**,**A.Tefas**and**I.Pitas**,**"Deep Convolutional Feature Histograms for Visual Object Tracking"**,*Proceedings of the IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)*, 2019.**E. Pantraki**and**C.Kotropoulos**,**"Leveraging Image-to-image Translation Generative Adversarial Networks for Face Aging"**,*Proc. 2019 IEEE Int. Conf. on Acoustics, Speech and Signal Processing (ICASSP)*, pp. 8370-8374, 2019.**E. Chatzikyriakidis**,**C. Papaioannidis**and**I.Pitas**,**"Adversarial Face De-Identification"**,*Proceedings of the IEEE International Conference on Image Processing (ICIP)*, September 22-25, 2019.**G. Karantaidis**,**I. Sarridis**and**C.Kotropoulos**,**"Block Randomized Optimization for Adaptive Hypergraph Learning"**,*Proc. 2019 IEEE Int. Conf. Image Processing (ICIP)*, September 22-25, 2019.**F. Patrona**,**I. Mademlis**,**A.Tefas**and**I.Pitas**,**"Computational UAV Cinematography for Intelligent Shooting Based on Semantic Visual Analysis"**,*Proceedings of the IEEE International Conference on Image Processing (ICIP)*, September 22-25, 2019.**N. Passalis**,**A.Tefas**,**J. Kanniainen**,**M. Gabbouj**and**A.Iosifidis**,**"Deep Temporal Logistic Bag-of-Features for Forecasting High Frequency Limit Order Book Time Series",***Proceedings of the IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP)*, 2019.**K. Saitas-Zarkias**,**N. Passalis**,**A. Tsantekidis**and**A.Tefas**,**"Deep Reinforcement Learning for Financial Trading using Price Trailing",***Proceedings of the IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP)*, 2019.**N. Passalis**,**G. Mourgias-Alexandris**,**A. Tsakyridis**,**N. Pleros**and**A.Tefas**,**"Variance Preserving Initialization for Training Deep Neuromorphic Photonic Networks with Sinusoidal Activations",***Proceedings of the IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP)*, 2019.**G. Mourgias-Alexandris**,**A. Tsakyridis**,**N. Passalis**,**A.Tefas**and**N. Pleros**,**"Experimental Demonstration of an Optical Neuron with a Logistic Sigmoid Activation Function",***Proceedings of the Optical Fiber Communication Conference (OFC)*, 2019.**G. Amato**,**F. Falchi**,**C. Gennaro**,**F. Massoli**,**N. Passalis**,**A.Tefas**,**A. Trivilini**and**C. Vairo**,**"Face Verification and Recognition for Digital Forensics and Information Security,",***International Symposium on Digital Forensic and Security (ISDFS)*, 2019.**M. Tzelepi**and**A.Tefas**,**"Discriminant Analysis Regularization in Lightweight Deep CNN Models"**,*Proceedings of the 26th IEEE International Conference on Image Processing (ICIP)*, 2019.**M. Tzelepi**and**A.Tefas**,**"Improving the Performance of Lightweight CNN Models Using Minimum Enclosing Ball Regularization"**,*Proceedings of the 27th European Signal Processing Conference (EUSIPCO)*, 2019.**I. Karakostas**,**V. Mygdalis**,**A.Tefas**and**I.Pitas**,**"On Detecting and Handling Target Occlusions in Correlation-filter-based 2D Tracking"**,*Proceedings of the 27th European Signal Processing Conference (EUSIPCO)*, September 2-6, 2019.**P. Nousi**,**D. Triantafyllidou**,**A.Tefas**and**I.Pitas**,**"Joint Lightweight Object Tracking and Detection for Unmanned Vehicles"**,*Proceedings of the IEEE International Conference on Image Processing (ICIP)*, September 22-25, 2019.**P. Nousi**,**I. Mademlis**,**I. Karakostas**,**A.Tefas**and**I.Pitas**,**"Embedded UAV Real-time Visual Object Detection and Tracking"**,*Proceedings of the IEEE International Conference on Real-time Computing and Robotics 2019 (RCAR2019)*, 2019.**E. Kakaletsis**and**N.Nikolaidis**,**"Potential UAV Landing Sites Detection Through Digital Elevation Models Analysis"**,*Proceedings of the 27th European Signal Processing Conference (EUSIPCO), Satellite Workshop: Signal Processing, Computer Vision and Deep Learning for Autonomous Systems*, September 2-6, 2019.**R. Fan**,**J. Jiao**,**H. Ye**,**Y. Yu**,**I.Pitas**and**M.Liu**,**"Key Ingredients of Self-Driving Cars",***Proc. IEEE 27th EUSIPCO Satellite Workshop: Signal Processing, Computer Vision and Deep Learning for Autonomous Systems*, pp. 1-5, 2019.**R. Fan**,**L. Wang**,**M.Liu**and**I.Pitas**,**"A Robust Roll Angle Estimation Algorithm Based on Gradient Descent",***Proc. IEEE 27th European Signal Processing Conference (EUSIPCO)*, pp. 1-5, 2019.**I. Mademlis**,**A. Torres-Gonzalez, J. Capitan, R. Cunha**,**B. Guerreiro, A. Messina, F. Negro, C. Le Barz**,**T. Goncalves**,**A.Tefas**,**N.Nikolaidis**and**I.Pitas**,**"A Multiple-UAV Software Architecture for Autonomous Media Production"**,*Proceedings of the 27th European Signal Processing Conference (EUSIPCO), Satellite Workshop: Signal Processing, Computer Vision and Deep Learning for Autonomous Systems*, 2019.**I. Mademlis**,**P. Nousi**,**C. Le Barz**,**T. Goncalves**and**I.Pitas**,**"Communications for Autonomous Unmanned Aerial Vehicle Fleets in Outdoor Cinematography Applications"**,*Proceedings of the 27th European Signal Processing Conference (EUSIPCO), Satellite Workshop: Signal Processing, Computer Vision and Deep Learning for Autonomous Systems*, 2019.**R. Cunha**,**M. Malaca**,**V. Sampaio**,**B. Guerreiro**,**P. Nousi**,**I. Mademlis**,**A.Tefas**and**I.Pitas**,**"Gimbal Control for Vision-based Target Tracking"**,**G. Karantaidis**and**C.Kotropoulos**,**"Efficient Capon-based Approach Exploiting Temporal Windowing for Electric Network Frequency Estimation"**,*Proc. IEEE Int. Workshop Machine Learning for Signal Processing (MLSP)*, October 13-16, 2019.**M. Ntemi**and**C.Kotropoulos**,**"A Dyadic Particle Filter for Price Prediction"**,*Proc. 27th European Signal Processing Conference (EUSIPCO)*, September 2-6, 2019.**M. Ntemi**,**C.Kotropoulos**and**E. Gionanidis**,**"A Weighted Ordered Probit Collaborative Kalman Filter for Hotel Rating Prediction"**,*Proc. IEEE Int. Workshop Machine Learning for Signal Processing (MLSP)*, October 13-16, 2019.**E. Kakaletsis**,**A.Tefas**,**N.Nikolaidis**and**I.Pitas**,**"Incremental Label Propagation on Facial Images"**,*Proc. IEEE Int. Workshop Machine Learning for Signal Processing (MLSP)*, October 13-16, 2019.**C. Symeonidis**,**I. Mademlis**,**N.Nikolaidis**and**I.Pitas**,**"Improving Neural Non-Maximum Suppression for Object Detection by Exploiting Interest-Point Detectors"**,*Proc. IEEE Int. Workshop Machine Learning for Signal Processing (MLSP)*, October 13-16, 2019.**C. Symeonidis**,**I. Karakostas**,**E. Martinopoulou**and**I.Pitas**,**"Image-based 3D Shape Reconstruction of Byzantine and Paleochristian Monuments"**,*Proceedings of the Digital Presentation and Preservation of Cultural and Scientific Heritage (DiPP2019)*, 2019.**A.Visintini**,**Ponnimbaduge Perera TD**,**Dzhayakodi Jayakody Arachshiladzh DN**and**I.Pitas**,**"UAV Trajectory Optimization in Modern Communication Systems: Advances and Challenges"**,*Proc. 14th International Forum on Strategic Technology (IFOST-2019)*, pp. 347-353, October 14-17, 2019.**K. Georgiadis**and**N.Laskaris**,**"Using Discriminative Lasso to Detect a Graph Fourier Transform (GFT) Subspace for robust decoding in Motor Imagery BCI"**,*Proceedings of the IEEE 41st Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)*, July 23-27, 2019.

**I. Mademlis**,**A.Tefas**and**I.Pitas**,**"Regularized SVD-based Video Frame Saliency for Activity Video Summarization"**,**P. Nousi**,**E. Patsiouras**,**A.Tefas**and**I.Pitas**,**"Convolutional Neural Networks for Visual Information Analysis With Limited Computing Resources",***Proceedings of the IEEE International Conference on Image Processing (ICIP)*, October 7-10, 2018.**I. Mademlis**,**V. Mygdalis**,**N.Nikolaidis**and**I.Pitas**,**"Challenges in Autonomous UAV cinematography: An Overview"**,*Proceedings of the IEEE International Conference on Multimedia and Expo (ICME)*, 2018.**V. Mygdalis**,**A.Tefas**and**I.Pitas**,**"Learning Multi-graph Regularization for SVM Classification"**,*Proceedings of the IEEE International Conference on Image Processing (ICIP)*, October 7-10, 2018.**G. Symeonidis**and**A.Tefas**,**"Recurrent Attention for Deep Neural Object Detection"**,*Proceedings of the Hellenic Conference on Artificial Intelligence (SETN)*, 2018.**I. Karakostas**,**I. Mademlis**,**N.Nikolaidis**and**I.Pitas**,**"UAV Cinematography Constraints Imposed by Visual Target Tracking"**,*Proceedings of the IEEE International Conference on Image Processing (ICIP)*, October 7-10, 2018.**N. Passalis**and**A.Tefas**,**"Accelerating Similarity-based Discriminant Analysis Using Class-specific Prototypes",***Proceedings of the IEEE International Conference on Image Processing (ICIP)*, 2018.**N. Passalis**and**A.Tefas**,**"Deep Reinforcement Learning for Frontal View Person Shooting Using Drones"**,*Proceedings of the IEEE Conference on Evolving and Adaptive Intelligent Systems (EAIS)*, 2018.**N. Passalis**,**A.Tefas**and**I.Pitas**,**"Efficient Camera Control Using 2D Visual Information for Unmanned Aerial Vehicle-based Cinematography"**,*Proceedings of the IEEE International Symposium on Circuits and Systems (ISCAS)*, 2018.**V. Lioutas**,**N. Passalis**and**A.Tefas**,**"Visual Question Answering Using Explicit Visual Attention"**,*Proceedings of the International Symposium on Circuits and Systems (ISCAS)*, 2018.**A. Messina, S. Metta, M. Montagnuolo, F. Negro**,**V. Mygdalis**,**I.Pitas**,**J. Capitan**and**A. Torres, S. Boyle, D. Bull, F. Zhang**,**"The Future of Media Production Through MULTIDRONES' Eyes"**,*International Broadcasting Convention (IBC)*, 2018.**N. Passalis**and**A.Tefas**,**"Neural Network Knowledge Transfer Using Unsupervised Similarity Matching"**,*Proceedings of the International Conference on Pattern Recognition (ICPR)*, 2018.**E. Kakaletsis**,**O.Zoidi**,**I. Tsingalis**,**A.Tefas**,**N.Nikolaidis**and**I.Pitas**,**"Label Propagation on Facial Images Using Similarity and Dissimilarity Labelling Constraints"**,*Proceedings of the IEEE International Conference on Image Processing (ICIP)*, 2018.**M. Tzelepi**and**A.Tefas**,**"Fully Unsupervised Optimization of CNN Features Towards Content Based Image Retrieval",***Proceedings of the IEEE 13th Image, Video, and Multidimensional Signal Processing Workshop (IVMSP)*, 2018.**M. Tzelepi**and**A.Tefas**,**"Fully Unsupervised Convolutional Learning for Fast Image Retrieval",***Proceedings of the ACM 10th Hellenic Conference on Artificial Intelligence*, 2018.**N. Passalis**and**A.Tefas**,**"Learning Deep Representations with Probabilistic Knowledge Transfer"**,*Proceedings of the European Conference on Computer Vision (ECCV)*, 2018.**K. Tsampazis**and**A.Tefas**,**"Deep Sparse Autoencoders for Football Match and Bet Prediction",***Proceedings of the ACM 10th Hellenic Conference on Artificial Intelligence (SETN)*, 2018.**I. Mademlis**,**A.Tefas**and**I.Pitas**,**"Greedy Salient Dictionary Learning with Optimal Point Reconstruction for Activity Video Summarization"**,*Proceedings of the IEEE International Workshop on Machine Learning for Signal Processing (MLSP)*, 2018.**P. Chriskos**,**R. Zhelev**,**V. Mygdalis**and**I.Pitas**,**"Quality Preserving Face De-Identification Against Deep CNNs"**,*Proceedings of the IEEE International Workshop on Machine Learning for Signal Processing (MLSP)*, September, 2018.**A. Papadimitriou**,**N. Passalis**and**A.Tefas**,**"Decoding Generic Visual Representations from Human Brain Activity Using Machine Learning"**,*Proceedings of the European Conference on Computer Vision Workshops - Workshop on Brain Driven Computer Vision (ECCVW)*, 2018 (Code).**D. Spathis**,**N. Passalis**and**A.Tefas**,**"Fast, Visual and Interactive Semi-Supervised Dimensionality Reduction"**,*Proceedings of the European Conference on Computer Vision Workshops - Workshop on Compact and Efficient Feature Representation and Learning in Computer Vision (ECCVW)*, 2018.**E. Pantraki**and**C.Kotropoulos**,**"Face Aging as Image-to-image Translation Using Shared-Latent Space Generative Adversarial Networks"**,*Proc. 2018 IEEE Global Conf. Signal and Information Processing (GLOBALSIP)*, pp. 306-310, November 26-29, 2018.**G. Karantaidis**and**C.Kotropoulos**,**"Assessing Spectral Estimation Methods for Electric Network Frequency Extraction"**,*Proc. 22nd Panhellenic Conf. on Informatics*, pp. 202-207, November 29-December 1, 2018.**M. Ntemi**and**C.Kotropoulos**,**"Prediction Methods for Time Evolving Dyadic Processes"**,*Proc. 26th European Signal Processing Conf.*, pp. 2606-2610, September 3-7, 2018.**N. Passalis**and**A.Tefas**,**"Learning Discriminative Representations for Big Data Clustering Using Similarity-Based Dimensionality Reduction",***IEEE Image, Video, and Multidimensional Signal Processing (IVMSP) Workshop*, 2018.**I.Kapsouras**and**N.Nikolaidis**,**"A vector of locally aggregated descriptors framework for action recognition on motion capture data"**,*2018 26th European Signal Processing Conference (EUSIPCO)*, pp 1785-1789, 2018.

**D. Triantafyllidou**,**P. Nousi**and**A.Tefas**,**"Lightweight Two-Stream Convolutional Face Detection"**,*Proceedings of the European Signal Processing Conference (EUSIPCO)*, August, 2017.**M. Tzelepi**and**A.Tefas**,**"Human Crowd Detection for Drone Flight Safety Using Convolutional Neural Networks"**,*Proceedings of the European Signal Processing Conference (EUSIPCO)*, 2017.**N. Passalis**and**A.Tefas**,**"Concept Detection and Face Pose Estimation Using Lightweight Convolutional Neural Networks for Steering Drone Video Shooting"**,*Proceedings of the European Signal Processing Conference (EUSIPCO)*, 2017.**N. Passalis**and**A.Tefas**,**"Improving Face Pose Estimation Using Long-Term Temporal Averaging for Stochastic Optimization"**,*Proceedings of the International Conference on Engineering Applications of Neural Networks (EANN)*, 2017.**P. Nousi**and**A.Tefas**,**"Discriminatively Trained Autoencoders for Fast and Accurate Face Recognition"**,*Proceedings of the International Conference on Engineering Applications of Neural Networks (EANN)*, 2017.**P. Chriskos**,**J. Munro**,**V. Mygdalis**and**I.Pitas**,**"Face Detection Hindering"**,*Proceedings of the IEEE Global Conference on Signal and Information Processing (GLOBALSIP)*, 2017.**O. Zachariadis**,**V. Mygdalis**,**I. Mademlis**,**N.Nikolaidis**and**I.Pitas**,**"2D Visual Tracking for Sports UAV Cinematography Applications"**,*Proceedings of the IEEE Global Conference on Signal and Information Processing (GLOBALSIP)*, 2017.**A. Torres-Gonzalez**,**J. Capitan**,**R. Cunha**,**A. Ollero**and**I. Mademlis**,**"A Multidrone Approach for Autonomous Cinematography Planning"**,*Proceedings of the Iberian Robotics Conference (ROBOT)*, 2017.**N. Passalis**and**A.Tefas**,**"Learning Bag-of-Features Pooling for Deep Convolutional Neural Networks"**,*Proceedings of the International Conference on Computer Vision (ICCV)*, 2017.**N. Passalis**,**A. Tsantekidis**,**A.Tefas**,**J. Kanniainen**,**M.Gabbouj**and**A.Iosifidis**,**"Time-series Classification Using Neural Bag-of-Features"**,*Proceedings of the European Signal Processing Conference (EUSIPCO)*, 2017.**A. Tsantekidis**,**N. Passalis**,**A.Tefas**,**J. Kanniainen**,**M.Gabbouj**and**A.Iosifidis**,**"Using Deep Learning to Detect Price Change Indications in Financial Markets."**,*Proceedings of the European Signal Processing Conference (EUSIPCO)*, 2017.**A. Tsantekidis**,**N. Passalis**,**A.Tefas**,**J. Kanniainen**,**M.Gabbouj**and**A.Iosifidis**,**"Forecasting Stock Prices from the Limit Order Book using Convolutional Neural Networks"**,*Proceedings of the IEEE Conference on Business Informatics (CBI)*, 2017.**I. Mademlis**,**A.Tefas**and**I.Pitas**,**"Summarization of Human Activity Videos Using a Salient Dictionary"**,*Proceedings of the International Conference on Image Processing (ICIP)*, 2017.**I. Mademlis**,**A.Tefas**,**N.Nikolaidis**and**I.Pitas**,**"Summarization of Human Activity Videos Via Low-Rank Approximation"**,*Proceedings of the IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)*, 2017.**I. Mademlis**,**V. Mygdalis**,**C. Raptopoulou**,**N.Nikolaidis**,**N. Heise, T. Koch, T. Wagner**,**A. Messina, F. Negro, S. Metta**and**I.Pitas**,**"Overview of Drone Cinematography for Sports Filming (short)"**,*Proceedings of the European Conference on Visual Media Production (CVMP)*, 2017.**E. Pantraki**and**C.Kotropoulos**,**"Multi-way Regression for Age Prediction Exploiting Speech and Face Image Information"**,*Proc. European Signal Processing Conf. (EUSIPCO)*, pp. 2260-2264, August 29-September 1, 2017.**F. Mandanas**and**C.Kotropoulos**,**"Using Marginal Median and Block Least Mean Squares in Mobile Adaptive Networks"**,*Proc. IEEE Global Conf. Signal and Information Processing*, pp. 211-215, November 14-16, 2017.**F. Mandanas**and**C.Kotropoulos**,**"Robust Multidimensional Scaling Employing M-Estimators and Nuclear Norm Regularization"**,*Proc. IEEE Global Conf. Signal and Information Processing*, pp. 116-120, November 14-16, 2017.

**A. Chassapi**,**C.Kotropoulos**and**K. Pliakos**,**"Adaptive algorithms for hypergraph learning"**,*Proc. 2016 IEEE Int. Conf. Acoustics, Speech, and Signal Processing*, March 20-25, 2016.**E. Pantraki**,**C.Kotropoulos**and**A. Lanitis**,**"Age and Gender Prediction Using PARAFAC2 Applied to Speech Utterances"**,*Proc. 4th Int. Workshop Biometrics and Forensics*, March 3-4, 2016.**V. Mygdalis**,**A.Iosifidis**,**A.Tefas**and**I.Pitas**,**"One Class Classification applied in facial image analysis"**,*IEEE International Conference on Image Processing (ICIP)*, 2016.**C. Avgerinos**,**N.Nikolaidis**,**V. Mygdalis**and**I.Pitas**,**"Feature extraction and statistical analysis of videos for cinemetric applications"**,*IEEE Digital Media Industry and Academic Forum (DMIAF)*, 2016.**V. Mygdalis**,**A.Iosifidis**,**A.Tefas**and**I.Pitas**,**"Kernel Subclass Support Vector Description for Face and Human Action Recognition"**,*International Workshop on Sensing, Processing and Learning for Intelligent Machines (SPLINE)*, 2016.**T. Theodoridis**,**A.Tefas**and**I.Pitas**,**"Multiview semantic temporal video segmentation"**,*IEEE International Conference on Image Processing (ICIP)*, 2016.**E. Kakaletsis**,**O.Zoidi**,**A.Tefas**,**N.Nikolaidis**and**I.Pitas**,**"Fast Label Propagation on Facial Images Using a Pruned Similarity Matrix"**,*IEEE Digital Media Industry & Academic Forum (DMIAF)*, 2016.**E. Fotiadou**,**N.Bassiou**and**C.Kotropoulos**,**"Greek Folk Music Classification Using Auditory Cortical Representations"**,*Proc. 24th European Signal Processing Conf. Budapest*, August 28-September 2, 2016.**P. Medentzidou**and**C.Kotropoulos**,**"Restoration of Missing Data in Greek Folk Music by Interpolation Techniques"**,*Proc. Digital Media Industry and Academic Forum*, pp. 107-112, July 2-4, 2016.**V.Gavriilidis**,**A.Tefas**,**C.Kotropoulos**and**N.Nikolaidis**,**"Enhanced Similarities for a Music Recommender System"**,*Proc. Digital Media Industry and Academic Forum*, pp. 113-116, July 2-4, 2016.**V. Mygdalis**,**A.Iosifidis**,**A.Tefas**and**I.Pitas**,**"Laplacian One Class Extreme Learning Machines for Human Action Recognition"**,*IEEE Workshop on Multimedia Signal Processing (MMSP)*, 2016.**I. Mademlis**,**A.Tefas**,**N.Nikolaidis**and**I.Pitas**,**"Movie Shot Selection Preserving Narrative Properties"**,*IEEE Workshop on Multimedia Signal Processing (MMSP)*, 2016.**V. Mygdalis**,**A.Tefas**and**I.Pitas**,**"Exploiting local and global geometric data relationships in Support Vector Data Description"**,*International Conference on Pattern Recognition (ICPR)*, 2016.**S. Samaras**,**V. Mygdalis**and**I.Pitas**,**"Robustness in Blind Camera Identification"**,*International Conference on Pattern Recognition (ICPR)*, 2016.**M. Tzelepi**and**A.Tefas**,**"Relevance Feedback in Deep Convolutional Neural Networks for Content Based Image Retrieval",***Hellenic Conference on Artificial Intelligence (SETN)*, 2016.**N. Passalis**and**A.Tefas**,**"Spectral Clustering using Optimized Bag-of-Features",***Hellenic Conference on Artificial Intelligence (SETN)*, 2016.**E. Fotiadou**,**I.Kapsouras**,**N.Nikolaidis**and**A.Tefas**,**"A Bag of Words approach for recognition of Greek folk dances",***Hellenic Conference on Artificial Intelligence (SETN)*, 2016.**N.Tsapanos**,**A.Tefas**and**N.Nikolaidis**,**"Efficient MapReduce Kernel k-Means for Big Data Clustering",***Hellenic Conference on Artificial Intelligence (SETN)*, 2016.**A.Iosifidis**,**A.Tefas**,**I.Pitas**and**M.Gabbouj**,**"A review of approximate methods for kernel-based Big Media Data Analysis",***European Signal Processing Conference (EUSIPCO)*, 2016.**E. Fotiadou**,**N.Nikolaidis**and**A.Tefas**,**"A comparative study of representations for folk dances recognition in video",***European Signal Processing Conference (EUSIPCO)*, 2016.**N. Passalis**and**A.Tefas**,**"Spatial Bag of Features Learning for Large Scale Face Image Retrieval",***INNS conference on Big Data*, 2016.**D. Triantafyllidou**and**A.Tefas**,**"A Fast Deep Convolutional Neural Network for face detection in Big Visual Data",***INNS conference on Big Data*, 2016.**I. Mademlis**,**A.Tefas**,**N.Nikolaidis**and**I.Pitas**,**"Compact Video Description and Representation for Automated Summarization of Human Activities"**,*INNS conference on Big Data*, 2016.**N. Passalis**and**A.Tefas**,**"Bag of Embedded Words Learning for Text Retrieval",***International Conference on Pattern Recognition (ICPR)*, 2016.**D. Triantafyllidou**and**A.Tefas**,**"Face detection based on Deep Convolutional Neural Networks exploiting incremental facial part learning",***International Conference on Pattern Recognition (ICPR)*, 2016.**M. Tzelepi**and**A.Tefas**,**"Exploiting supervised learning for finetuning deep CNNs in Content Based Image Retrieval",***International Conference on Pattern Recognition (ICPR)*, 2016.

**K. Pliakos**and**C.Kotropoulos**,**"Weight estimation in hypergraph learning"**,*Proc. 2015 IEEE Int. Conf. Acoustics, Speech, and Signal Processing*, pp. 1161-1165, April 19-24, 2015.**A.Iosifidis**,**A.Tefas**and**I.Pitas**,**"Nearest Class Vector Classification for Large-Scale Learning Problems"**,*IEEE International Conference on Big Data Science and Engineering (BigDataSE)*, 2015.**V. Mygdalis**,**A.Iosifidis**,**A.Tefas**and**I.Pitas**,**"Large-scale classification by an Approximate Least Squares One-Class Support Vector Machine ensemble"**,*IEEE International Conference on Big Data Science and Engineering (BigDataSE)*, 2015.**A.Iosifidis**,**A.Tefas**and**I.Pitas**,**"Class-specific nonlinear subspace learning based on optimized class representation"**,*European Signal Processing Conference (EUSIPCO)*, 2015.**A.Iosifidis**,**A.Tefas**and**I.Pitas**,**"Regularized Extreme Learning Machine for large-scale media content analysis"**,*International Neural Network Society (INNS) Conference on Big Data*, 2015.**A.Iosifidis**,**A.Tefas**and**I.Pitas**,**"Merging Linear Discriminant Analysis with Bag of Words model for Human Action Recognition"**,*IEEE International Conference on Image Processing (ICIP)*, 2015.**A.Iosifidis**,**A.Tefas**and**I.Pitas**,**"Large-scale nonlinear facial image classification based on Approximate Kernel Extreme Learning Machine"**,*IEEE International Conference on Image Processing (ICIP)*, 2015.**A.Iosifidis**,**A.Tefas**and**I.Pitas**,**"Enhancing ELM-based facial image classification by exploiting multiple facial views"**,*International Conference on Computational Science (ICCS)*, 2015.**K. Papachristou**,**A.Tefas**and**I.Pitas**,**"Facial Image Analysis based on Two-Dimensional Linear Discriminant Analysis Exploiting Symmetry"**,*IEEE International Conference on Image Processing (ICIP)*, 2015.**K. Papachristou**,**A.Tefas**and**I.Pitas**,**"Exploiting Symmetry in Two-Dimensional Clustering-Based Discriminant Analysis for Face Recognition"**,*European Signal Processing Conference (EUSIPCO)*, 2015.**N.Tsapanos**,**A.Tefas**,**N.Nikolaidis**and**I.Pitas**,**"Kernel Matrix Trimming for Improved Kernel k-Means Clustering"**,*IEEE International Conference on Image Processing (ICIP)*, 2015.**N.Tsapanos**,**A.Tefas**,**N.Nikolaidis**and**I.Pitas**,**"Distributed, MapReduce-based Nearest Neighbor and e-ball Kernel k-Means"**,*IEEE Symposium Series on Computational Intelligence (SSCI)*, 2015.**N.Tsapanos**,**A.Tefas**,**N.Nikolaidis**,**A.Iosifidis**and**I.Pitas**,**"Fast Kernel Matrix Computation for Big Data Clustering"**,*International Conference on Computational Science (ICCS)*, 2015.**P. Chriskos**,**O.Zoidi**,**A.Tefas**and**I.Pitas**,**"De-Identifying Facial Images Using Projections on Hyperspheres"**,*Automatic Face and Gesture Recognition (FG), 11th IEEE International Conference and Workshops*, pp. 1-6, 4-8 May, 2015.**R. Li**,**C.Kotropoulos**,**C.-T. Li**and**Y. Guan**,**"Random Subspace Method For Source Camera Identification"**,*Proc. IEEE Int. Workshop Machine Learning for Signal Processing*, September 17-20, 2015.**E. Pantraki**and**C.Kotropoulos**,**"Automatic image tagging and recommendation via PARAFAC2"**,*Proc. IEEE Int. Workshop Machine Learning for Signal Processing*, September 17-20, 2015.**P. Medentzidou**and**C.Kotropoulos**,**"Video summarization based on shot boundary detection with penalized contrasts"**,*Proc. 9th Int. Symposium Signal and Image Processing and Analysis*, pp. 201-205, September 7-9, 2015.**P. Barboutis**,**C.Kotropoulos**and**K. Pliakos**,**"Image tag recommendation based on novel tensor structures and their decompositions"**,*Proc. 9th Int. Symposium Signal and Image Processing and Analysis*, pp. 9-14, September 7-9, 2015.**N.Bassiou**,**C.Kotropoulos**and**A. Papazoglou-Chalikias**,**"Greek folk music classification into two genres using lyrics and audio via canonical correlation"**,*Proc. 9th Int. Symposium Signal and Image Processing and Analysis*, pp. 240-245, September 7-9, 2015.**M. Panagopoulos**and**C.Kotropoulos**,**"Image tagging using tensor decomposition"**,*Proc. 6th Int. Conf. Information, Intelligence, Systems and Applications (IISA2015)*, July 6-8, 2015.**F. Mandanas**and**C.Kotropoulos**,**"A maximum correntropy criterion for multidimensional scaling"**,*Proc. 2015 IEEE Int. Conf. Audio, Speech, and Signal Processing*, pp. 1906-1910, April 19-24, 2015.**F. Mandanas**and**C.Kotropoulos**,**"Correntropy based robust multidimensional scaling applied to faces"**,*Proc. 3th Int. Workshop Biometrics and Forensics*, March 3-4, 2015.**F. Patrona**,**A.Iosifidis**,**A.Tefas**,**N.Nikolaidis**and**I.Pitas**,**"Visual voice activity detection based on spatiotemporal information and bag of words"**,*IEEE International Conference on Image Processing (ICIP)*, pp. 2334-2338, 2015.**O.Zoidi**,**N.Nikolaidis**,**A.Tefas**and**I.Pitas**,**"Multi-modal label propagation based on a higher order similarity matrix",***IEEE International Workshop on Machine Learning for Signal Processing (MLSP)*, p. 1-6, September 17-20, 2015.**A.Maronidis**,**A.Tefas**and**I.Pitas**,**"Subclass Marginal Fisher Analysis"**,*IEEE Symposium Series on Computational Intelligence (SSCI)*, pp. 1391-1398, December 8-10, 2015.**A.Maronidis**,**A.Tefas**and**I.Pitas**,**"Graph Embedding Exploiting Subclasses"**,*IEEE Symposium Series on Computational Intelligence (SSCI)*, pp. 1452-1459, December 8-10, 2015.**I.Kapsouras**,**A.Tefas**,**N.Nikolaidis**and**I.Pitas**,**"Multimodal Speaker Diarization Utilizing Face Clustering Information"**,*Proc. Int. Conf. on Image and Graphics: (ICIG)*, pp. 547-554, August 13-16, 2015.**I. Mademlis**,**N.Nikolaidis**and**I.Pitas**,**"Stereoscopic video description for key-frame extraction in movie summarization"**,*European Signal Processing Conference (EUSIPCO)*, 31 August - 4 September, 2015.**E. Kakaletsis**and**N.Nikolaidis**,**"A technique for fake 3D (2D-to-3D converted) video recognition"**,*European Signal Processing Conference (EUSIPCO)*, pp. 106-109, 31 August-4 September, 2015.**J. Blat, A. Evans, J. Agenjo, K. Hansung, E. Imre, A. Hilton**,**A.Tefas**,**N.Nikolaidis**,**I.Pitas**and**L. Polok, P. Smrz, P. Zemcik**,**"IMPART: Big media data processing and analysis for film production"**,*IEEE International Conference on Multimedia Expo Workshops (ICMEW)*, pp. 1-5, June 29 - July 3, 2015.**C.Chrysouli**and**A.Tefas**,**"Evolution of Graphs for Unsupervised Learning"**,*Studies in Computational Intelligence*, pp 21-31, November 2015, Revised selected paper from IJCCI2014, 2015.**A.Iosifidis**,**A.Tefas**and**I.Pitas**,**"Single-Hidden Layer Feedforward Neual Network Training Using Class Geometric Information"**,*Studies in Computational Intelligence*, pp 351-364, November 2015, Revised selected paper from IJCCI2014, 2015.**V. Mygdalis**,**A.Iosifidis**,**A.Tefas**and**I.Pitas**,**"Exploiting Subclass Information in One-class Support Vector Machine for Video Summarization"**,*IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)*, 19-24 April, 2015.**A.Iosifidis**,**A.Tefas**and**I.Pitas**,**"Enhancing Class Discrimination in Kernel Discriminant Analysis"**,*IEEE International Conference on Acoustics,Speech and Signal Processing (ICASSP)*, 19-24 April, 2015.

**V.Gavriilidis**and**A.Tefas**,**"Random Walk Kernel Applications to Classification Using Support Vector Machines"**,*International Conference on Pattern Recognition (ICPR)*, 2014.**N.Arvanitopoulos**,**D.Bouzas**and**A.Tefas**,**"Laplacian Support Vector Analysis for Subspace Discriminative Learning"**,*International Conference on Pattern Recognition (ICPR)*, 2014.**V.Gavriilidis**and**A.Tefas**,**"Activity Recognition for Traditional Dances Using Dimensionality Reduction"**,*Conference on Artificial Intelligence (SETN): Methods and Applications*, 2014.**N. Mpountouropoulos**,**A.Tefas**,**N.Nikolaidis**and**I.Pitas**,**"Visual Information Analysis for Big-Data Using Multi-core Technologies"**,*First Euro-China Conference on Intelligent Data Analysis and Applications*, pp. 309-316, 2014.**C.Chrysouli**and**A.Tefas**,**"Spectral Clustering Using Evolving Similarity Graphs"**,*International Joint Conference on Computational Intelligence (IJCCI): International Conference on Evolutionary Computation Theory and Applications (ECTA)*, pp. 21-31, October 22-24, 2014.**N.Tsapanos**,**A.Tefas**,**N.Nikolaidis**and**I.Pitas**,**"Large graph clustering using DCT-based graph clustering"**,*IEEE Symposium on Computational Intelligence in Big Data (CIBD)*, pp. 1-4, December 9-12, 2014.**E. Fotiadou**and**N.Nikolaidis**,**"A correspondence based method for activity recognition in human skeleton motion sequences"**,*IEEE International Conference on Image Processing (ICIP)*, pp. 1500-1504, October 27-30, 2014.**K. Kelgeorgiadis**and**N.Nikolaidis**,**"Human action recognition in 3D motion sequences"**,*European Signal Processing Conference (EUSIPCO)*, pp. 2205-2209, 1-5 September, 2014.**I.Kapsouras**and**N.Nikolaidis**,**"Action Recognition in Motion Capture Data Using a Bag of Postures Approach"**,*International Conference on Pattern Recognition (ICPR)*, pp. 2649-2654, 24-28 August, 2014.**C.Chrysouli**,**V.Gavriilidis**and**A.Tefas**,**"Graph-based Kernel Representation of Videos for Traditional Dance Recognition"**,*International Joint Conference on Computational Intelligence (IJCCI): International Conference on Neural Computation Theory and Applications (NCTA)*, October 22-24, 2014.**A.Iosifidis**,**A.Tefas**and**I.Pitas**,**"Human Action Recognition based on Bag of Features and Multi-view Neural Networks"**,*IEEE International Conference on Image Processing (ICIP)*, 2014.**A.Iosifidis**,**A.Tefas**and**I.Pitas**,**"Semi-supervised classification of human actions based on Neural Networks"**,*IEEE International Conference on Pattern Recognition (ICPR)*, 2014.**A.Iosifidis**,**A.Tefas**and**I.Pitas**,**"Minimum Variance Extreme Learning Machine for Human Action Recognition"**,*IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)*, 2014 (Code).**A.Iosifidis**,**A.Tefas**and**I.Pitas**,**"Human Action Recognition in Stereoscopic Videos based on Bag of Features and Disparity Pyramids"**,*European Signal Processing Conference (EUSIPCO)*, 2014.**A.Iosifidis**,**A.Tefas**and**I.Pitas**,**"Exploiting Local Class Information in Extreme Learning Machine"**,*International Joint Conference on Computational Intelligence (IJCCI): International Conference on Neural Computation Theory and Applications (NCTA)*, 2014 (Code).**V. Mygdalis**,**A.Iosifidis**,**A.Tefas**and**I.Pitas**,**"Video summarization based on subclass Support Vector Data Description"**,*IEEE Symposium Series on Computational Intelligence (SSCI): Computational Intelligence for Engineering Solutions*, 2014.**A.Iosifidis**,**A.Tefas**and**I.Pitas**,**"Computational Intelligence Approaches for Digital Media Analysis and Description"**,*Euro-China Conference on Intelligent Data Analysis and Applications (ECC)*, 2014.**M. Ivasic-Kos**,**A.Iosifidis**,**A.Tefas**and**I.Pitas**,**"Person De-identification in Activity Videos"**,*IEEE International Convention on Information and Communication Technology, Electronics and Microelectronics (MIPRO)*, 2014.**A.Iosifidis**,**A.Tefas**and**I.Pitas**,**"Multi-view Regularized Extreme Learning Machine for Human Action Recognition"**,*Conference on Artificial Intelligence (SETN): Methods and Applications*, 2014.**O.Zoidi**,**N.Nikolaidis**and**I.Pitas**,**"Label Propagation on data with multiple representations through multi-graph locality preserving projections"**,*IEEE International Conference on Image Processing (ICIP)*, 2014.**O.Zoidi**,**A.Tefas**,**N.Nikolaidis**and**I.Pitas**,**"Iterative Label Propagation on facial images"**,*European Signal Processing Conference (EUSIPCO)*, 2014.**O.Zoidi**,**N.Nikolaidis**and**I.Pitas**,**"Semi-supervised dimensionality reduction on data with multiple representations for label propagation on facial images"**,*39th International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2014)*, 2014.**K. Papachristou**,**A.Tefas**and**I.Pitas**,**"Subspace Learning with Enriched Databases Using Symmetry"**,*the First Euro-China Conference on Intelligent Data Analysis and Applications (ECC)*, 2014.**K. Papachristou**,**A.Tefas**,**N.Nikolaidis**and**I.Pitas**,**"Stereoscopic Video Shot Clustering into Semantic Concepts based on Visual and Disparity Information"**,*IEEE International Conference on Image Processing (ICIP)*, 2014.**K. Papachristou**,**A.Tefas**,**N.Nikolaidis**and**I.Pitas**,**"Stereoscopic Video Shot Classification based on Weighted Linear Discriminant Analysis"**,*the IEEE International Workshop on Machine Learning for Signal Processing (MLSP 2014)*, 2014.**I.Pitas**,**K. Papachristou**and**N.Nikolaidis**,**"**M. Liuni, L. Benaroya, G. Peeters, A. Roebel, A. Linnemann, M. Liu and S. Gerke,**"2D/3D AudioVisual Content Analysis & Description"**,*the IEEE 16th International Workshop on Multimedia Signal Processing (MMSP 2014)*, 2014.**I. Mademlis**,**A.Iosifidis**,**A.Tefas**,**N.Nikolaidis**and**I.Pitas**,**"Stereoscopic Video Description for Human Action Recognition"**,*IEEE Symposium Series on Computational Intelligence (SSCI): Computational Intelligence for Multimedia, Signal and Vision Processing*, 2014.**K. Papachristou**,**N.Nikolaidis**and**I.Pitas**,**"**M. Liuni, L. Benaroya, G. Peeters, A. Roebel, A. Linnemann, M. Liu and S. Gerke,**"The Use of the MPEG-7 AVDP Profile in 3D AudioVisual Content Description"**,*the EBU MDN Workshop 2014*, 2014.**N. Kourous**,**A.Iosifidis**,**A.Tefas**,**N.Nikolaidis**and**I.Pitas**,**"Video Characterization based on Activity Clustering"**,*International Conference on Electrical and Computer Engineering (ICECE)*, 2014.**K. Papachristou**,**N.Nikolaidis**and**I.Pitas**,**"**A. Linnemann, M. Liu and S. Gerke,**"Human-centered 2D/3D Video Content Analysis and Description"**,*International Conference on Electrical and Computer Engineering (ICECE)*, 2014.**V. Mygdalis**,**A.Iosifidis**,**A.Tefas**and**I.Pitas**,**"Supervised video summarization by content-based video segment selection” (short)"**,*European Conference on Visual Media Production (CVMP)*, 2014.**N.Bassiou**,**C.Kotropoulos**and**I.Pitas**,**"Greek folk music denoising under a symmetric a-stable noise assumption"**,*Proc. 10th Int. Conf. Heterogeneous Networking for Quality, Reliability, Security, and Robustness (QSHINE 2014)*, 2014 (invited).**N.Bassiou**and**C.Kotropoulos**,**"Musical audio denoising assuming symmetric a-stablenoise"**,*Proc. 40th Int. Computer Music Conf. (ICMC) joint with the 11th Sound & MusicComputing Conf. (SMC)*, pp. 1404-1401, September 14-20, 2014.**K. Pliakos**and**C.Kotropoulos**,**"Social image search exploiting joint visual-textual information within a fuzzy hypergraph framework"**,*in Proc. IEEE 16th Int. Workshop Multimedia Signal Processing*, 2014.**E. Giouvanakis**and**C.Kotropoulos**,**"Boosting the Weights of Positive Words in Image Retrieval"**,*Proc. 22rd European Signal Processing Conf. (EUSIPCO)*, 2014.**K. Pliakos**and**C.Kotropoulos**,**"PLSA driven image annotation, classification, and tourism recommendation"**,*Proc. 2014 IEEE Int. Conf. Image Processing (ICIP)*, pp. 3003-3007, October 27-30, 2014.**C.Kotropoulos**and**S. Samaras**,**"Mobile phone brand and model identification using recorded speech signals recommendation"**,*19th International Conference on Digital Signal Processing*, pp. 586-591, August 20-23, 2014.**E. Giouvanakis**and**C.Kotropoulos**,**"Saliency map driven image retrieval combining the bag of words model and PLSA"**,*Proc. 2014 IEEE Int. Conf. Image Processing*, pp. 280-285, August 20-23, 2014.**K. Pliakos**and**C.Kotropoulos**,**"Simultaneous image clustering, classification and annotation for tourism recommendation"**,*Proc. 8th Hellenic Conf. Artificial Intelligence*, pp. 630-640, May 15-17, 2014.**K. Pliakos**and**C.Kotropoulos**,**"Personalized and geo-referenced image recommendationusing unified hypergraph learning and group sparsity optimization"**,*Proc. 2014 Int. Symposium Communications, Control, and Signal Processing*, pp. 323-326, May 21-23, 2014.**K. Pliakos**and**C.Kotropoulos**,**"Personalized music tagging using ranking on hypergraphs"**,*Proc. 2014 Int. Symposium Communications, Control, and Signal Processing*, pp. 323-326, May 21-23, 2014.**C.Kotropoulos**and**K. Pitas**,**"Subspace clustering applied to face images"**,*Proc. 2nd Int. Workshop Biometrics and Forensics*, 2014.**K. Pliakos**and**C.Kotropoulos**,**"Simultaneous image tagging and geo-location prediction within hypergraph ranking framework"**,*2014 IEEE Int. Conf. Audio, Speech, and Signal Processing*, pp. 6944-6948, May 4-8, 2014.**G.Orphanidis**,**A.Tefas**,**N.Nikolaidis**and**I.Pitas**,**"Facial Image Clustering in Stereo Videos Using Local Binary Patterns and Double Spectral Analysis"**,*IEEE Symposium Series on Computational Intelligence (SSCI)*, 2014.**G.Orphanidis**,**N.Nikolaidis**,**A.Tefas**and**I.Pitas**,**"Stereo facial image clustering using double spectral analysis"**,*International Conference on Electrical and Computer Engineering (ICECE)*, 2014.**I. Tsingalis**,**A.Tefas**,**N.Nikolaidis**and**I.Pitas**,**"Shot type characterization in 2D and 3D video content"**,*IEEE International Workshop on Multimedia Signal Processing (MMSP)*, 2014.**P. Chriskos**,**O.Zoidi**,**A.Tefas**and**I.Pitas**,**"De-identifying facial images using singular value decomposition"**,*IEEE International Convention on Information and Communication Technology, Electronics and Microelectronics (MIPRO)*, 2014.**I. Tsingalis**,**I. Pipilis**and**I.Pitas**,**"A statistical and clustering study on YouTube 2D and 3D video recommendation graph"**,*6th International Symposium on Communications, Control, and Signal Processing (ISCCSP 2014)*, 2014.**M.Liu**,**I. Mademlis**,**P. Ndjiki-Nya**,**J.C Le Quintrec**,**N.Nikolaidis**and**I.Pitas**,**"Efficient Automatic Detection of 3D Video Artifacts"**,*IEEE International Workshop on Multimedia Signal Processing (MMSP)*, 2014.

**T.Theodoridis**,**K. Papachristou**,**N.Nikolaidis**and**I.Pitas**,**"Object motion description in stereoscopic videos"**,*International Conference on 3D Imaging (IC3D)*, pp. 1-7, 3-5 December, 2013.**C.Kotropoulos**,**"Telephone Handset Identification Using Sparse Representations of Spectral Feature Sketches"**,*Proc. Int. Workshop Biometrics and Forensics*, 4-5 April, 2013.**G.Orphanidis**,**N.Nikolaidis**and**I.Pitas**,**"Facial image clustering in single channel and stereo video content."**,*Proc. Int. Workshop Biometrics and Forensics*, 4, April 4-5, 2013.**G.Orphanidis**,**N.Nikolaidis**and**I.Pitas**,**"Facial Image Clustering in 3D Video Using Constrained Ncut"**,*21st European Signal Processing Conference (EUSIPCO-2013)*, 5, September 9-13, 2013.**O.Zoidi**,**N.Nikolaidis**and**I.Pitas**,**"Exploiting Clustering and Stereo Information in Label Propagation of Facial Images"**,*IEEE Symposium Series on Computational Intelligence (SSCI 2013)*, April 16-19, 2013.**O.Zoidi**,**N.Nikolaidis**and**I.Pitas**,**"Appearance Based Object Tracking in Stereo Sequences"**,*38th International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2013)*, May 26-31, 2013.**O.Zoidi**,**A.Tefas**and**I.Pitas**,**"Exploiting the SVM constraints in NMF with Apllication in Eating and Drinking Activity recognition"**,*IEEE International Conference on Image Processing (ICIP 2013)*, September 15-18, 2013.**O.Zoidi**,**A.Tefas**and**I.Pitas**,**"Exploiting Discriminant and SVM Constraints in NMF"**,*21st European Signal Processing Conference (EUSIPCO 2013)*, September 9-13, 2013.**A.Iosifidis**,**A.Tefas**and**I.Pitas**,**"Active Classification for Human Action Recognition"**,*IEEE International Conference on Image Processing (ICIP)*, 2013.**A.Iosifidis**,**A.Tefas**and**I.Pitas**,**"Dynamic Action Classification based on Iterative Data Selection and Feedforward Neural Networks"**,*European Signal Processing Conference (EUSIPCO)*, 2013.**A.Iosifidis**,**A.Tefas**and**I.Pitas**,**"Person Identification from Actions based on Artificial Neural Networks"**,*IEEE Symposium Series on Computational Intelligence (SSCI): Computational Intelligence in Biometrics and Identity Management*, 2013.**A.Iosifidis**,**A.Tefas**and**I.Pitas**,**"View-independent Human Action Recognition based on Multi-view Action Images and Discriminant Learning"**,*IEEE Image, Video and Multidimensional Signal Processing (IVMSP): 3D Image/Video Technologies and Applications*, 2013.**A.Iosifidis**,**A.Tefas**and**I.Pitas**,**"Person Identification from Actions based on Dynemes and Discriminant Learning"**,*IEEE International Workshop on Biometrics and Forensics (IWBF)*, 2013.**A.Iosifidis**,**A.Tefas**and**I.Pitas**,**"Representative Class Vector Clustering based Discriminant Analysis"**,*IEEE International Conference on Intelligent Information Hiding and Multimedia Signal Processing (IIHMSP)*, 2013.**A.Iosifidis**,**A.Tefas**and**I.Pitas**,**"Multi-view human action recognition: a review"**,*IEEE International Conference on Intelligent Information Hiding and Multimedia Signal Processing (IIHMSP)*, 2013.**A.Tefas**,**A.Iosifidis**and**I.Pitas**,**"Neural Networks for Digital Media Analysis and Description"**,*Engineering Applications of Neural Networks (EANN)*, 2013.**I.Kapsouras**,**S.Karanikolos**,**N.Nikolaidis**and**A.Tefas**,**"Folk dance recognition using a bag of words approach and ISA/STIP features"**,*BCI '13 Proceedings of the 6th Balkan Conference in Informatics*, pp 71-74, 2013.**I.Kapsouras**,**S.Karanikolos**,**N.Nikolaidis**and**A.Tefas**,**"Feature Comparison and Feature Fusion for Traditional Dances Recognition"**,*Engineering Applications of Neural Networks, Communications in Computer and Information Science*, vol 383, pp172-181, 2013.**N.Bassiou**,**C.Kotropoulos**and**E.Koliopoulou**,**"Symmetric a-stable sparse linear regression for musical audio denoising"**,*Proc. 8th Int. Symposium Image and Signal Processing, and Analysis (ISPA 2013)*, pp. 375-380, September 4-6, 2013.**E. Giouvanakis**,**C.Kotropoulos**,**A. Theodoridis**and**I.Pitas**,**"A game with a purpose for annotating Greek folk music in a web content management system"**,*Proc. 18th Int. Conf. Digital Signal Processing*, July 1-3, 2013.**A. Theodoridis**,**C.Kotropoulos**and**Y.Panagakis**,**"Music recommendation using hypergraphs and group sparsity"**,*Proc. 2013 IEEE Int. Conf. Acoustics, Speech, and Signal Processing*, pp. 56-60, May 26-31, 2013.**S.Delis**,**N.Nikolaidis**and**I.Pitas**,**"Automatic 3D Defects Identification in Stereoscopic Videos"**,*20th IEEE International Conference on Image Processing (ICIP)*, September 15-18, 2013.**N.Nikolaidis**,**I.Pitas**,**K. Gorgulu**,**M.Liu**,**A. Robel**and**E. E. Tsiropoulou**,**"3DTV Audiovisual Content Analysis and Description"**,*11th IEEE IVMSP Workshop : 3D Image/Video Technologies and Applications*, June 10-12, 2013.**G.Chantas**,**N.Nikolaidis**and**I.Pitas**,**"A Bayesian Methodology for Visual Object Tracking on Stereo Sequences"**,*11th IEEE IVMSP Workshop : 3D Image/Video Technologies and Applications*, June 10-12, 2013.**S.Delis**,**N.Nikolaidis**and**I.Pitas**,**"Automatic Detection of Depth Jump Cuts and Bent Window Effects in Stereoscopic Videos"**,*11th IEEE IVMSP Workshop : 3D Image/Video Technologies and Applications*, June 10-12, 2013.**G.Chantas**,**N.Nikolaidis**and**I.Pitas**,**"Variational Bayesian Inference for Stereo Object Tracking"**,*38th International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2013)*, May 26-31, 2013.**N. Papanikoloudis**,**S.Delis**,**N.Nikolaidis**and**I.Pitas**,**"Semantic Description in Stereo Video Content for Surveillance Applications"**,*International Workshop on Biometrics and Forensics (IWBF 2013)*, April 4-5, 2013.**M. Oikonomou**and**A.Tefas**,**"Direct Multi-label Linear Discriminant Analysis"**,*Engineering Applications of Neural Networks (EANN)*, September 13-16, 2013.**S.Nikitidis**,**A.Tefas**and**I.Pitas**,**"Maximum Margin Discriminant Projections for Facial Expression Recognition"**,*21st European Signal Processing Conference (EUSIPCO 2013)*, September 9-13, 2013.

**O.Zoidi**,**A.Tefas**and**I.Pitas**,**"Visual Object Tracking Based on the Object's Salient Features with Application in Automatic Nutrition Assistance"**,*IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP)*, 25-30 March, 2012.**I. Tsingalis**,**N.Vretos**,**N.Nikolaidis**and**I.Pitas**,**"Anthropocentric Descriptors and Description Schemes for Multi-View Video Content"**,*16th IEEE Mediterranean Electrotechnical Conference*, 25-28 March, 2012.**Y.Panagakis**and**C.Kotropoulos**,**"Automatic music tagging by low-rank representation"**,*Proc. IEEE 2012 Int. Conf. Audio, Speech, and Signal Processing*, March, 2012.**A.Iosifidis**,**E.Marami**,**A.Tefas**and**I.Pitas**,**"Eating and drinking activity recognition based on discriminant analysis of fuzzy distances and activity volumes"**,*IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP2012)*, March, 2012.**N.Tsapanos**,**I.Pitas**and**N.Nikolaidis**,**"Graph Representations using Adjacency Matrix Transforms for Clustering"**,*16th IEEE Mediterranean Electrotechnical Conference*, 25-28 March, 2012.**D.Galanopoulos**,**Ch.Athanasiadis**and**A.Tefas**,**"Evolutionary Optimization of a Neural Network Controller for Car Racing Simulation"**,*7th Hellenic Conference on Artificial Intelligence*, 28-31 May, 2012.**V.Gavriilidis**and**A.Tefas**,**"Exploiting Quadratic Mutual Information for Discriminant analysis"**,*7th Hellenic Conference on Artificial Intelligence*, 28-31 May, 2012.**A.Iosifidis**,**A.Tefas**and**I.Pitas**,**"Neural representation and learning for multi-view human action recognition"**,*2012 IEEE International Joint Conference on Neural Networks (IJCNN), ΙΕΕΕ World Congress on Computational Intelligence*, June 15-20, 2012.**A.Iosifidis**,**A.Tefas**and**I.Pitas**,**"Multi-view Human Action Recognition Under Occlusion Based on Fuzzy Distances and Neural Networks"**,*Proc. 2012 European Signal Processing Conference*, August 27-31, 2012.**A.Iosifidis**,**A.Tefas**and**I.Pitas**,**"Discriminant Action Representation for View-Invariant Person Identification"**,*Proc. IEEE 2012 International Conference on Image Processing*, September 30 - October 3, 2012.**G.Chantas**,**N.Nikolaidis**and**I.Pitas**,**"Variational Bayesian Inference for Forward Backward Visual Tracking in Stereo Sequences"**,*Proc. IEEE 2012 International Conference on Image Processing*, September 30 - October 3, 2012.**S. Karavarsamis**,**I.Pitas**and**N. Ntarmos**,**"Recognizing pornographic images"**,*Proc. 14th ACM Workshop on Multimedia and Security*, September 6-7, 2012.**Y.Panagakis**and**C.Kotropoulos**,**"Music Structure Analysis by Subspace Modeling"**,*Proc. 2012 European Signal Processing Conference*, pp. 1459-1463, August 27-31, 2012.**Y.Panagakis**and**C.Kotropoulos**,**"Automatic Telephone Handset Identification by Sparse Representation of Random Spectral Features"**,*Proc. 14th ACM Workshop on Multimedia and Security*, pp. 91-95, September 6-7, 2012.**Y.Panagakis**and**C.Kotropoulos**,**"Music Structure Analysis by Ridge Regression of Beat-Synchronous Audio Features"**,*Proc. Music Information Retrieval Conference*, pp. 271-276, October 8-12, 2012.**Y.Panagakis**and**C.Kotropoulos**,**"Telephone handset identification by feature selection and sparse representations"**,*Proc. 2012 IEEE Int. Workshop Information Forensics and SecuritySecurity*, pp. 73-78, December, 2012.**N.Vretos**,**N.Nikolaidis**and**I.Pitas**,**"Using the MPEG-7 Audio-Visual Description Profile for 3D Video Content Description"**,*NEM Summit*, 16-18 October, 2012.**N.Vretos**,**N.Nikolaidis**and**I.Pitas**,**"The Use of Audio-Visual Description Profile in 3D Video Content Description"**,*3DTV-Conference*, October 15-17, 2012.**I. Tsingalis**,**N.Vretos**,**N.Nikolaidis**and**I.Pitas**,**"SVM-based Shot Type Classification of Movie Content"**,*Proc. of 9th Mediterranean Electro technical Conference*, pp. 104-107, 16-18 October, 2012.**O.Zoidi**,**N.Nikolaidis**and**I.Pitas**,**"Exploiting disparity information in visual object tracking"**,*3DTV-CON*, October 15-17, 2012.**O.Zoidi**,**A.Tefas**and**I.Pitas**,**"Visual Object Tracking via Gabor-based Salient Features Extraction"**,*20th European Signal Processing Conference (EUSIPCO)*, August 27-31, 2012.**C.Athanasiadis**,**D.Galanopoulos**and**A.Tefas**,**"Progressive Neural Network Training For The Open Racing Car Simulator"**,*IEEE Conference on Computational Intelligence and Games*, September 11-14, 2012.**G.Orphanidis**and**A.Tefas**,**"Exploiting Subclass Information in Support Vector Machines"**,*21st International Conference on Pattern Recognition*, November 11-15, 2012.**N.Pitelis**and**A.Tefas**,**"Discriminant Subspace Learning Based on Support Vectors Machines"**,*8th International Conference on Machine Learning and Data Mining*, July 13-20, 2012.**N.Vretos**,**A.Tefas**and**I.Pitas**,**"Facial Expression Recognition with Robust Covariance Estimation and SupporVector Machines",***IEEE International Workshop on Machine Learning for Signal Processing*, September 24-27, 2012.**G.Arvanitidis**and**A.Tefas**,**"Exploiting graph embedding in support vector machines"**,*IEEE International Workshop on Machine Learning for Signal Processing*, September September 24-27, 2012.

**Y.Panagakis**and**C.Kotropoulos**,**"Automatic music tagging via PARAFAC2"**,*Proc. 2011 IEEE Int. Conf. Audio, Speech and Signal Processing*, pp. 481-484, May, 2011.**M.Holte**,**T.Moeslund**,**N.Nikolaidis**and**I.Pitas**,**"3D Human Action Recognition for Multi-View Camera Systems"**,*Joint Conference on 3D Imaging, Modeling, Processing, Visualization, Transmission (3DIMPVT 2011)*, May, 2011.**Y.Panagakis**and**C.Kotropoulos**,**"Automatic music mood classification via low-rank representation"**,*Proc. 19th European Signal Processing Conf.*, pp. 689-693, August, 2011.**N.Tsapanos**,**N.Nikolaidis**and**I.Pitas**,**"Towards Automated Post-Production and Semantic Annotation of Films",***International Conference on Image Information Processing*, November, 2011.**O.Zoidi**,**A.Tefas**and**I.Pitas**,**"Object Tracking Based on Local Steering Kernels for Drinking Activity Recognition"**,*Information Technology Interfaces (ITI)*, June, 2011.**N.Vretos**,**N.Nikolaidis**and**I.Pitas**,**"3D Facial Expression Recognition Using Zernike Moments On Depth Images"**,*IEEE International Conference in Image Processing (ICIP2011)*, September, 2011.**C.Chrysouli**,**N.Vretos**and**I.Pitas**,**"Face Clustering in videos based on Spectral Clustering Techniques"**,*Asian Conference on Pattern Recognition (ACPR2011)*, November, 2011.**E.Marami**,**A.Tefas**and**I.Pitas**,**"Nutrition Assistance based on Skin Color Segmentation and Support Vector Machines"**,*International Conference on Man-Machine Interactions (ICMMI2011)*, October, 2011.**A.Iosifidis**,**A.Tefas**,**N.Nikolaidis**and**I.Pitas**,**"Learning Human Identity Using View-Invariant Multi-view Movement Representation"**,*Biometrics and ID Management workshop, Springer LNCS*, March, 2011.**D.Bouzas**,**N.Arvanitopoulos**and**A.Tefas**,**"Optimizing Linear Discriminant Error Correcting Output Codes Using Particle Swarm Optimization"**,*21st Int. Conf. on Artificial Neural Networks*, June, 2011.**A.Tefas**and**I.Pitas**,**"Human Centered Interfaces for Assisted Living"**,*International Conference on Man-Machine Interactions (ICMMI 2011)*, October, 2011.**M.Kyperountas**,**A.Tefas**and**I.Pitas**,**"Entropy-Based Iterative Face Classification"**,*Biometrics and ID Management workshop, Springer LNCS*, March, 2011.**E.Kiossis**,**C.N.Brozos**,**N.Nikolaidis**,**E.Souglis**and**H.Bollwein**,**"Changes in echostructure values of the nedometrium during pregnancy in Holstein Friesian cows"**,*36th Mutual conference on Veterinary and Human Reproductive Medicine*, February, 2011.**I.Marras**,**N.Nikolaidis**and**I.Pitas**,**"Frontal Facial Pose Recognition using a Discriminant Splitting Feature Extraction Procedure"**,*33rd International Conference on Information Technology Interfaces 2011 (ITI 2011)*, 2011.**G.Moschos**,**N.Nikolaidis**,**I.Pitas**and**K.L.Lyroudia**,**"A Virtual Anatomical 3D Head, Oral Cavity and Teeth Model for Dental and Medical Applications"**,*International Conference on Man-Machine Interactions 2011*, 2011.**C.Cotsaces**,**N.Nikolaidis**and**I.Pitas**,**"Recognizing real world objects using multiple views"**,*European Signal Processing Conference (EUSIPCO)*, 2011.**I.Marras**,**N.Nikolaidis**and**I.Pitas**,**"Discriminant Splitting Feature Extraction with Application to View-Independent Object Recognition"**,*European Signal Processing Conference (EUSIPCO)*, 2011.**Y.Panagakis**,**C.Kotropoulos**and**G.R.Arce**,**"l1-Graph Based Music Structure Analysis"**,*Proc. 2011 Int. Symposium Music Information Retrieval*, pp. 495-500, October, 2011.**C.Sagonas**,**I.Pitas**,**A.Kyrgidis**and**K.L.Lyroudia**,**"PROSOPON: a virtual anatomical 3D head model",***International Conference on Image Information Processing*, November, 2011.**S.Nikitidis**,**A.Tefas**and**I.Pitas**,**"Recent Advances in Discriminant Non-negative Matrix Factorization"**,*Proc. First Asian Conference on Pattern Recognition (ACPR2011)*, November 28-30, 2011.**S.Nikitidis**,**A.Tefas**,**N.Nikolaidis**and**I.Pitas**,**"Facial Expression Recognition Using Clustering Discriminant Non-negative Matrix Factorization"**,*IEEE International Conference in Image Processing (ICIP 2011)*, September 11-14, 2011.**S.Nikitidis**,**A.Tefas**and**I.Pitas**,**"Using Subclasses in Discriminant Non-negative Subspace Learning for Facial Expression Recognition"**,*Proc. 19th European Signal Processing Conference (EUSIPCO 2011),*, August 29 – September 2, 2011.**A.Iosifidis**,**A.Tefas**and**I.Pitas**,**"Person specific activity recognition using fuzzy learning and discriminant analysis"**,*European Signal Processing Conference (EUSIPCO2011)*, August, 2011.

**I.Pitas**and**N.Nikolaidis**,**"Anthropocentric Video Analysis For Film And Games Postproduction"**,*CompSysTech 2010*, 17-18 May, 2010.**E.Zarogianni**,**I.Marras**and**N.Nikolaidis**,**"Using Haptic-based Trajectory Following in 3D Space to Distinguish Between Men and Women"**,*EuroHaptics 2010*, 225-230, July, 2010.**Y.Panagakis**and**C.Kotropoulos**,**"Music genre classification via topology preserving non-negative tensor factorization and sparse representations"**,*Proc. 2010 IEEE Int. Conf. Acoustics, Speech, and Signal Processing*, pp. 249-252, 2010.**M.Kotti**,**F.Patterno**and**C.Kotropoulos**,**"Speaker-independent negative emotion recognition"**,*Proc. 2nd Int. Workshop Cognitive Information Processing*, pp. 417-422, June, 2010.**C.Kotropoulos**,**G.R.Arce**and**Y.Panagakis**,**"Ensemble discriminant sparse projections applied to music genre classification"**,*Proc. 2010 Int. Conf. Pattern Recognition*, pp. 823-825, August, 2010.**N.Bassiou**and**C.Kotropoulos**,**"Word clustering using PLSA enhanced with long distance bigrams"**,*Proc. 2010 Int. Conf. Pattern Recognition*, pp. 4226-4229, August, 2010.**Y.Panagakis**,**C.Kotropoulos**and**G.R.Arce**,**"Sparse Multi-label Linear Embedding Within Nonnegative Tensor Factorization Applied to Music Tagging"**,*Proc. 2010 Int. Symposium Music Information Retrieval*, pp. 393-398, August, 2010.**Y.Panagakis**,**C.Kotropoulos**and**G.R.Arce**,**"Sparse multi-label linear embedding nonnegative tensor factorization for automatic music tagging"**,*Proc. 2010 European Signal Processing Conf.*, pp. 492-496, August, 2010.**S.Nikitidis**,**N.Nikolaidis**and**I.Pitas**,**"Incremental Training of Multiclass Support Vector Machines"**,*International Conference on Pattern Recognition (ICPR 2010)*, August 23-26, 2010.**C.Cotsaces**,**I.Marras**,**N.Tsapanos**,**N.Nikolaidis**and**I.Pitas**,**"Human-centered Video Analysis for Multimedia Postproduction"**,*International Symposium on Electronics and Telecommunications (ISETC) 2010*, November, 2010.**D.Zotos**,**N.Nikolaidis**and**I.Pitas**,**"Video Replica Detection Utilizing R-Trees And Frame-Based Voting"**,*IEEE International Conference on Multimedia and Expo (ICME 2010)*, July, 2010.**A.Iosifidis**,**N.Nikolaidis**and**I.Pitas**,**"Movement recognition exploiting multi-view information"**,*IEEE International Workshop on Multimedia Signal Processing*, October, 2010.**N.Tsapanos**,**N.Nikolaidis**and**I.Pitas**,**"Studying the Effectiveness of Using Linear Subspace Techniques to Improve SVM Classifiers in Facial Image Classifcation"**,*International Symposium on Electronics and Telecommunications (ISETC)*, November, 2010.**G.Sfyris**,**N.Nikolaidis**and**I.Pitas**,**"Multi-view Object and Human Body Part Detection Utilizing 3D Scene Information"**,*IEEE ICIP 2010*, July, 2010.**E.Marami**and**A.Tefas**,**"Face Detection using Particle Swarm Optimization and Support Vector Machines"**,*6th Hellenic Conference on Artificial Intelligence*, May 4 - 7, 2010.**N.Arvanitopoulos**,**D.Bouzas**and**A.Tefas**,**"Mutual Information Measures for Subclass Error-Correcting Output Codes Classification"**,*6th Hellenic Conference on Artificial Intelligence*, May 4 - 7, 2010.**D.Bouzas**,**N.Arvanitopoulos**and**A.Tefas**,**"Optimizing subclass discriminant Error Correcting Output Codes using particle swarm optimization"**,*IEEE International Joint Conference on Neural Networks (IJCNN)*, July 18-23, 2010.**E.Marami**and**A.Tefas**,**"Using Particle Swarm Optimization for Scaling and Rotation invariant Face Detection"**,*2010 IEEE congress on Evolutionary Computation*, July 18 - 23, 2010.**N.Arvanitopoulos**,**D.Bouzas**and**A.Tefas**,**"Subclass Error Correcting Output Codes using Fisher's Linear Discriminant Ratio"**,*20th International Conference on Pattern Recognition*, September 15 - 18, 2010.**D.Bolis**,**A.Maronidis**,**A.Tefas**and**I.Pitas**,**"Improving the Robustness of Subspace Learning Techniques for Facial Expression Recognition"**,*20th International Conference on Artificial Neural Networks*, September 15-18, 2010.**A.Maronidis**,**A.Tefas**and**I.Pitas**,**"Frontal view recognition using Spectral Clustering and Subspace Learning methods"**,*20th International Conference on Artificial Neural Networks*, September 15-18, 2010.**S.Petrakis**and**A.Tefas**,**"Neural Networks Training for Weapon Selection in First-Person Shooter Games"**,*20th International Conference on Artificial Neural Networks*, September 15-18, 2010.**N.Tsapanos**,**A.Tefas**and**I.Pitas**,**"Dynamic Shape Learning and Forgetting"**,*20th International Conference on Artificial Neural Networks*, pp. 333-338, September, 2010.**M. Kasampali**,**K. Papachristou**,**K.L.Lyroudia**,**N.Nikolaidis**and**I.Pitas**,**"Modification of root canal geometry after rotary instrumentation with twisted files, assessed by microcomputed tomography"**,*8th World Endodontic Congress*, October, 2010.

**N.Vretos**,**N.Nikolaidis**and**I.Pitas**,**"A Model Based Facial Expression Recognition Algorithm using the Eigendecomposition of the Gram Matrix"**,*Proc. of Int. Conf. on Image Processing (ICIP 2009)*, 7-11 November, 2009.**N.Gkalelis**,**N.Nikolaidis**and**I.Pitas**,**"View independent human movement recognition from multi-view video exploiting a circular invariant posture representation"**,*Proc. IEEE International Conference on Multimedia and Expo (ICME 2009)*, June - July, 2009.**N.Gkalelis**,**A.Tefas**and**I.Pitas**,**"Fusion of movement specific human identification experts"**,*Proc Joint COST 2101 & COST 2102 International Conference on Biometric ID Management and Multimodal Communication*, September, 2009.**N.Gkalelis**,**A.Tefas**and**I.Pitas**,**"Human identification from human movements"**,*IEEE International Conference on Image Processing (ICIP 2009)*, November, 2009.**N.Gkalelis**,**H.Kim**,**A.Hilton**,**N.Nikolaidis**and**I.Pitas**,**"The i3DPost multi-view and 3D human action/interaction database"**,*6th Conference on Visual Media Production (CVMP 2009)*, Nov, 2009.**M.Kyperountas**and**I.Pitas**,**"Facial Expression Recognition Using Two-Class Discriminant Features"**,*Biometric ID Management and Multimodal Communication*, 89-96, September, 2009.**M.Kyperountas**,**A.Tefas**and**I.Pitas**,**"Pairwise Facial Expression Classification"**,*MMSP 2009*, 1-4, OCTOBER, 2009.**Y.Panagakis**,**C.Kotropoulos**and**G.R.Arce**,**"Music genre classification via sparse representations of auditory temporal modulations"**,*Proc. 17th European Signal Processing Conf.*, pp. 1-5, August, 2009.**Y.Panagakis**,**C.Kotropoulos**and**G.R.Arce**,**"Music genre classification using locality preserving non-negative tensor factorization and sparse representations"**,*Proc. 2009 Int. Symposium Music Information Retrieval*, pp. 249-254, October, 2009.**N.Nikolaidis**and**I.Pitas**,**"Still Image and Video Fingerprinting"**,*7th International Conference on Advances in Pattern Recognition (ICAPR 2009)*, invited paper – keynote speech of I. Pitas, February, 2009.**G.Goudelis**,**A.Tefas**and**I.Pitas**,**"Using Mutual Information to Indicate Facial Poses in Video Sequences"**,*ACM International Conference on Image and Video Retrieval*, July 8 - 10, 2009.**I.Kotsia**,**N.Nikolaidis**and**I.Pitas**,**"Frontal Facial View Recognition in Video Sequences using DNMF and SVMs"**,*Proc. of 2009 IEEE International Conference on Multimedia and Expo*, 28 June-3 July, 2009.**N.Vretos**,**N.Nikolaidis**and**I.Pitas**,**"A Perceptual Hashing Algorithm Using Latent Dirichlet Allocation"**,*Proc. of Int. Conf. on Multimedia and Expo (ICME 2009)*, June 28 - July 3, 2009.

**I.Kotsia**,**S.Zafeiriou**,**N.Nikolaidis**and**I.Pitas**,**"Texture and Shape Information Fusion for Facial Action Unit Recognition"**,*Proc. of The First International Conference on Advances in Computer-Human Interaction (ACHI 08)*, 10-15 February, 2008.**S.Nikitidis**,**S.Zafeiriou**and**I.Pitas**,**"Camera Motion Estimation Using Particle Filters"**,*Proc. of 3rd International Conference on Computer Vision Theory and Applications (VISAPP 2008)*, January, 2008.**M.Kyperountas**,**A.Tefas**and**I.Pitas**,**"Face recognition via adaptive discriminant clustering"**,*Image Processing, 2008. ICIP 2008. 15th IEEE International Conference on*, 2744-2747, October, 2008.**S.Zafeiriou**,**A.Tefas**and**I.Pitas**,**"Gender Determination Using a Support Vector Machine Variant"**,*Proc. 16th European Signal Processing Conference (EUSIPCO 2008)*, August, 2008.**G.Goudelis**,**S.Zafeiriou**,**A.Tefas**and**I.Pitas**,**"Motivating class-specific nonlinear projections for face verification"**,*2008 IEEE International Conference on Image Processing*, October 12 - 15, 2008.**N.Barbalios**,**N.Nikolaidis**and**I.Pitas**,**"3D Human Face Modelling >From Uncalibrated Images Using Spline Based Deformation"**,*3rd International Conference on Computer Vision Theory and Applications (VISAPP 2008)*, January, 2008.**N.Tsapanos**,**A.Tefas**and**I.Pitas**,**"An Online Self-Balancing Binary Search Tree for Hierarchical Shape Matching"**,*3rd International Conference on Computer Vision Theory and Applications (VISAPP 2008)*, January, 2008.**Z.Cernekova**,**C. Malerczyk**,**Z.Cernekova**and**I.Pitas**,**"Single Camera Pointing Gesture Recognition for Interaction in Edutainment Applications"**,*Spring Conference on Computer Graphics 2008*, 2008.**I.Kotsia**,**S.Zafeiriou**and**I.Pitas**,**"Discriminant Non-negative Matrix Factorization and Projected Gradients for Frontal Face Verification"**,*Proc. of The First COST 2101 Workshop on Biometrics and Identity Management (BIOID 2008)*, 7-9 May, 2008.**D.Ververidis**,**I.Kotsia**,**C.Kotropoulos**and**I.Pitas**,**"Multi-modal emotion-related data collection within a virtual earthquake emulator"**,*Proc. Of 6th Language Resources and Evaluation Conference*, 28-30 May, 2008.**I.Buciu**,**I.Pitas**and**I.Nafornita**,**"Holistic and Local Image Representations for Human Face Analysis"**,*IEEE International Conference on Communications*, pp. 137 - 144, June 05-07, 2008.**I.Buciu**,**I.Pitas**and**I.Nafornita**,**"Global Gabor features for rotation invariant object classification"**,*Proc. IEEE Fourth International Conference on Intelligent Computer Communications and Processing (ICCP)*, pp. 41 - 46, August 28-30, 2008.**I.Buciu**,**I.Nafornita**and**I.Pitas**,**"Facial Expression Recognition under Noisy Environment Using Gabor Filters"**,*Proc. IEEE International Symposium on Electronics and Telecommunications (ETC)*, September 25-26, 2008.**P.Moschonas**and**C.Kotropoulos**,**"Multimodal Speaker Identification based on Text and Speech"**,*Proc. COST 2101 Workshop Biometrics and Identity Management BioID'2008*, vol. LNCS 5372, pp. 100-106, May 7-9, 2008.**D.Spachos**,**A.Zlantintsi, V.Moschou, P.Antonopoulos, K.Tzimouli**,**E.Benetos**,**M.Kotti**,**C.Kotropoulos**,**N.Nikolaidis**,**P.Maragos**and**I.Pitas**,**"MUSCLE movie-database: A multimodal corpus with rich annotation for dialogue and Saliency Detection"**,*Proc. LREC 2008 Workshop on Multimodal Corpora*, May 26-27, 2008.**E.Benetos**and**C.Kotropoulos**,**"A tensor-based approach for automatic music genre classification"**,*Proc. 16th European Signal Processing Conf.*, August, 2008.**Y.Panagakis**,**E.Benetos**and**C.Kotropoulos**,**"Music genre classification: A multilinear approach"**,*Proc. Int. Symposium Music Information Retrieval*, pp. 583-588, September, 2008.**M.Kotti**and**C.Kotropoulos**,**"Gender Classification In Two Emotional Speech Databases"**,*Proc. Int. Conf. Pattern Recognition*, December, 2008.**N.Gkalelis**,**A.Tefas**and**I.Pitas**,**"Human movement recognition using fuzzy clustering and discriminant analysis"**,*Proc. 16th European Signal Processing Conference (EUSIPCO 2008)*, August, 2008.**N.Gkalelis**,**A.Tefas**and**I.Pitas**,**"Sparse human movement representation and recognition"**,*Proc. IEEE 2008 International Workshop on Multimedia Signal Processing (MMSP 2008)*, October, 2008.**N.Vretos**,**V.Solachidis**,**P.Somol**and**I.Pitas**,**"Facial Expression Recognition Using Angle-related Information From Facial Meshes"**,*Proc. EUSIPCO 2008*, August 25-29, 2008.

**G.Almpanidis**and**C.Kotropoulos**,**"Automatic phonemic segmentation using the Bayesian information criterion with generalised Gamma priors"**,*Proc. XV European Signal Processing Conf.*, pp. 2055-2059, September, 2007.**E.Benetos**,**M.Kotti**and**C.Kotropoulos**,**"Large scale musical instrument identification"**,*Proc. 4th Sound and Music Computing Conference*, pp. 283-286, July, 2007.**Z.Cernekova**,**N.Nikolaidis**and**I.Pitas**,**"Single Camera Pointing Gesture Recognition Using Spatial Features and Support Vector Machines"**,*Proc. of 15th European Signal Processing Conference (EUSIPCO-2007)*, September, 2007.**I.Cherif**,**V.Solachidis**and**I.Pitas**,**"Shot Type Identification Of Movie Content"**,*Proc. of Int. Symposium Signal Processing and its Applications (ISSPA 2007)*, February, 2007.**R.Cardenes**,**M.Bach**,**Y.Chi**,**I.Marras**,**R.Luis**,**P.Cashman**,**M.Anderson**and**M.Bultelle**,**"Multimodal Evaluation for Medical Image Segmentation"**,*Proc. of 12th International Conference on Computer Analysis of Images and Patterns (CAIP?07)*, August, 2007.**G.Goudelis**,**S.Zafeiriou**,**A.Tefas**and**I.Pitas**,**"A Novel Kernel Discriminant Analysis For Face Verification"**,*Proc.of 2007 IEEE International Conference on Image Processing*, September, 2007.**A.Hajdu**and**I.Pitas**,**"Tracing on heterogeneous grids to improve concavity performance of snake algorithms"**,*Proc. of Int.Symposium Signal Processing and its Applications (ISSPA 2007)*, 12 - 15 February, 2007.**A.Hajdu**,**C.Giamas**and**I.Pitas**,**"Object simplification using a skeleton-based weight function"**,*Proc. of Int. Symposium Signals, Circuits, and Systems (ISSCS 2007)*, 12-13 July, 2007.**A.Hajdu**,**C.Giamas**,**N.Vretos**and**I.Pitas**,**"Metadata description of thermal videos for rescue operations"**,*Proc. of Int. Symposium Signals, Circuits, and Systems (ISSCS 2007)*, 12-13 July, 2007.**A.Hajdu**and**I.Pitas**,**"Compression optimized tracing of digital curves using graph theory"**,*Proc. of Int. Conf. on Image Processing (ICIP 2007)*, 16-19 September, 2007.**A.Hajdu**and**I.Pitas**,**"Content adaptive heterogeneous snakes"**,*Proc. of Int. Conf. on Image Processing (ICIP 2007)*, 16-19 September, 2007.**I.Kotsia**,**N.Nikolaidis**and**I.Pitas**,**"Facial Expression Recognition In Videos Using A Novel Multi-class Support Vector Machines Variant"**,*Proc. of Int. Conf. Acoustics, Speech and Signal Processing (ICASSP 2007), Honolulu*, 15-20 April, 2007.**I.Kotsia**,**S.Zafeiriou**,**N.Nikolaidis**and**I.Pitas**,**"Multiclass Support Vector Machines And Metric Multidimensional Scaling For Facial Expression Recognition"**,*Proc. of IEEE Workshop on Neural Networks for Signal Processing( MLSP 2007)*, 27-29 August, 2007.**M.Kotti**,**E.Benetos**and**C.Kotropoulos**,**"Neural network-based movie dialogue detection"**,*Proc. 2007IEEE Engineering Applications of Neural Networks*, pp. 380-386, 29-31 August, 2007.**M.Kyperountas**,**A.Tefas**and**I.Pitas**,**"Face verification using locally linear discriminant models"**,*Proc. of Int. Conf. on Image Processing (ICIP 2007)*, 16-19 Sep., 2007.**V.Moschou**,**M.Kotti**,**E.Benetos**and**C.Kotropoulos**,**"Systematic comparison of BIC-based speaker segmentation systems"**,*Proc. 2007 IEEE Multimedia Signal Processing Conf.*, pp. 66-69, October 1-3, 2007.**M.Krinidis**,**N.Nikolaidis**and**I.Pitas**,**"3D Head Pose Estimation Using Support Vector Machines and Physics-Based Deformable Surfaces"**,*Proc. of Int. Symposium Signal Processing and its Applications (ISSPA 2007)*, 12-15 February, 2007.**M.Krinidis**,**N.Nikolaidis**and**I.Pitas**,**"Using Deformable Surface Models to Derive a DCT-Like 2D Transform"**,*Proc. of Int. Conf. Multimedia & Expo (ICME 2007)*, July 2-5, 2007.**M.Sedaaghi**,**D.Ververidis**and**C.Kotropoulos**,**"Improving speech emotion recognition using adaptive genetic algorithms"**,*Proc. XV European Signal Processing Conf.*, pp. 2209-2213, 2007.**M.Sedaaghi**,**C.Kotropoulos**and**D.Ververidis**,**"Using adaptive genetic algorithms to improve speech emotion recognition"**,*Proc. 2007 IEEE Multimedia Signal Processing Conf.*, pp. 461-464, October 1-3, 2007.**D.Ververidis**and**C.Kotropoulos**,**"Accurate estimate of the cross-validated prediction error variance in Bayes classifiers"**,*Proc. of Machine Learning for Signal Processing (MLSP)*, pp. 354-359, August 27-29, 2007.**N.Vretos**,**V.Solachidis**and**I.Pitas**,**"A Robust Face Clustering Algorithm Based on Mutual Information Using Tracking Information"**,*Proc. of 11th Panhellenic Conference on Informatics (PCI'2007)*, 18-20 May, 2007.**N.Vretos**,**V.Solachidis**and**I.Pitas**,**"A Face Tracker Trajectories Clustering Using Mutual Information"**,*Proc. of Int. Workshop Multimedia Signal Processing (MMSP 2007)*, 1-3 October, 2007.**S.Zafeiriou**,**A.Tefas**and**I.Pitas**,**"Advances in Elastic Graph Matching for Frontal Face Verification"**,*2007 IEEE Symposium on Computational Intelligence in Image and Signal Processing*, pp. 319 - 324, April 1 - 5, 2007.**S.Zafeiriou**,**A.Tefas**and**I.Pitas**,**"Discriminant Graph Structures for Face Verification"**,*IEEE International Conference on Acoustics Speddch and Signal Processing 2007 (ICASSP'07)*, vol. 1, pp. 497 -500, April 15 - 20, 2007.**S.Zafeiriou**,**A.Tefas**and**I.Pitas**,**"A new class of decision surfaces based on the minimization of within class variance"**,*Proc. Of IEEE International Workshop on Machine Learning for Signal Processing (MLSP 2007)*, pp. 441 - 446, August 27 - 29, 2007.**S.Asteriadis**,**N.Nikolaidis**,**I.Pitas**and**M.Pardas**,**"Detection of facial characteristics based on edge information"**,*International Conference on Computer Vision Theory and Applications (VISAPP 2007)*, 2007.**P.Antonopoulos**,**N.Maglaveras**and**I.Pitas**,**"Hierarchical face clustering using SIFT image features"**,*IEEE Symposium on Computational Intelligence for Image and Signal Processing (CIISP 2007)*, 5 pages, 2007.**E.Horness**,**N.Nikolaidis**and**I.Pitas**,**"Blind City Maps Watermarking Utilizing Road Width Information"**,*2007 EURASIP European Signal Processing Conference (EUSIPCO 2007)*, 2007.**I.Kasampalidis**,**I.Pitas**,**G.Karagianopoulou**,**I.Kostopoulos**,**P.Aretini, G.Bevilacqua, A.Cavazzana, M.Menicagli, A.Starita**and**K.Lyroudia**,**"FISH Image Analysis Using a Modified Radial Basis Function Network"**,*ISSCS 2007*, July 12-13, 2007.**A.Digka**,**K.Lyroudia**,**L.Kubinova**,**I.Marras**,**N.Nikolaidis**and**I.Pitas**,**"3-D Reconstruction Of Pulpal Blood Vessels By Using Confocal Microscopy"**,*2nd annual meeting of IADR-Continental European and Israeli Divisions*, September, 2007.**I.Kasampalidis**,**I.Pitas**,**G.Karagianopoulou**,**I.Kostopoulos**,**P.Aretini, G.Bevilacqua, A.Cavazzana, M.Menicagli, A.Starita**and**K.Lyroudia**,**"FISH Image analysis using a modified radial basis function Network."**,*ISSCS 2007*, July 12-13, 2007.

**G.Almpanidis**and**C.Kotropoulos**,**"Voice activity detection using the generalized Gamma distribution"**,*Proc. of 4th Panhellenic Artificial Intelligence Conf. (SETN-06)*, pp. 961-964, May 19-20, 2006.**G.Almpanidis**and**C.Kotropoulos**,**"Voice activity detection with generalized Gamma distribution"**,*Proc. of 2006 IEEE Int. Conf. on Multimedia and Expo (ICME 2006)*, 9-12 July, 2006.**G.Almpanidis**and**C.Kotropoulos**,**"Phoneme segment boundary detection based on the generalized Gamma distribution"**,*Proc. of 2006 Int. Symposium on Industrial Electronics (ISIE 2006)*, pp. 691-695, 9-13 July, 2006.**S.Asteriadis**,**N.Nikolaidis**,**A.Hajdu**and**I.Pitas**,**"An Eye Detection Algorithm Using Pixel to Edge Information"**,*Proc. of 2nd IEEE-EURASIP Int. Symposium on Control, Communications, and Signal Processing (ISCCSP 2006)*, 13-15 March, 2006.**S.Asteriadis**,**N.Nikolaidis**,**A.Hajdu**and**I.Pitas**,**"A novel eye-detection algorithm utilizing edge-related geometrical information"**,*Proc. of European Signal Processing Conf. (EUSIPCO 2006)*, 4-8 September, 2006.**N.Bassiou**and**C.Kotropoulos**,**"Color histogram equalization using probability smoothing"**,*Proc. of XIV European Signal Processing Conf. (EUSIPCO 2006)*, 4-8 September, 2006.**E.Benetos**,**M.Kotti**and**C.Kotropoulos**,**"Application of non-negative matrix factorization to musical instrument classification"**,*Proc. of Int. Symposium Communications, Control and Signal Processing, (ISCCSP 2006)*, 13-15 March, 2006.**E.Benetos**,**M.Kotti**and**C.Kotropoulos**,**"Musical instrument classification using non-negative matrix factorization algorithms"**,*Proc. of IEEE Int. Symposium Circuits & Systems (ISCAS 2006)*, 21-24 May, 2006.**E.Benetos**,**M.Kotti**and**C.Kotropoulos**,**"Musical instrument classification using non-negative matrix factorization and subset feature selection"**,*Proc. of 2006 IEEE Int. Conf. on Acoustics, Speech, and Signal Processing (ICASSP 2006)*, vol. V., pp. 221-224, 14-19 May, 2006.**E.Benetos**,**M.Kotti**and**C.Kotropoulos**,**"Applying supervised classifiers based on non-negative metrix factorization to musical instrument classification"**,*Proc. 2006 IEEE Int. Conf. Multimedia and Expo*, pp. 2105-2108, 9-12 July, 2006.**E.Benetos**,**C.Kotropoulos**,**T.Lidy**and**A.Rauber**,**"Testing supervised classifiers based on non-negative metrix factorization to musical instrument classification"**,*Proc. of European Signal Processing Conf. (EUSIPCO 2006)*, 4-8 September, 2006.**I.Buciu**,**N.Nikolaidis**and**I.Pitas**,**"A comparative study of NMF, DNMF, and LNMF algorithms applied for face recognition"**,*Proc. of 2nd IEEE-EURASIP Int. Symposium on Control, Communications, and Signal Processing (ISCCSP 2006)*, 13-15 March, 2006.**I.Buciu**,**N.Nikolaidis**and**I.Pitas**,**"On the initialization of the DNMF algorithm"**,*Proc. of 2006 IEEE Int. Symposium on Circuits and Systems*, 21-24 May, 2006.**I.Buciu**,**Z.Hammal**,**A.Caplier**,**N.Nikolaidis**and**I.Pitas**,**"Enhancing facial expression classification by information fusion"**,*Proc. of European Signal Processing Conf. (EUSIPCO 2006)*, 4-8 September, 2006.**Z.Cernekova**,**N.Nikolaidis**and**I.Pitas**,**"AIIA shot boundary detection at TRECVID 2006"**,*Proc. of 2006 Workshop on TREC Video Retrieval Evaluation, NIST , Gaithersburg*, November, 2006.**Z.Cernekova**,**N.Nikolaidis**and**I.Pitas**,**"Temporal Video Segmentation by Graph Patitioning"**,*Proc. of 2006 IEEE Int. Conf. on Acoustics, Speech, and Signal Processing (ICASSP 2006)*, 14-19 May, 2006.**I.Cherif**,**V.Solachidis**and**I.Pitas**,**"A Tracking Framework for Accurate Face Localization"**,*Proc. of Int. Federation for Information Processing Conf. on Artificial Intelligence (IFIP AI 2006)*, 21-24 August, 2006.**C.Cotsaces**,**N.Nikolaidis**and**I.Pitas**,**"Video Indexing by Face Occurrence-based Signatures"**,*Proc. of 2006 IEEE Int. Conf. on Acoustics, Speech and Signal Processing*, 14-19 May, 2006.**M.Gavrielides**,**E.Sikudova**,**D.Spachos**and**I.Pitas**,**"Color Features for Image Fingerprinting"**,*Proc. of SETN 2006*, 18-20 May, 2006.**A.Hajdu**,**A.Roubies**and**I.Pitas**,**"Optimized chamfer matching for snake-based image contour representations"**,*Proc. of 2006 IEEE Int. Conf. on Multimedia & Expo (ICME 2006), Toronto*, 9-12 July, 2006.**C.Kotropoulos**and**V.Moschou**,**"Self organizing maps for reducing the number of clusters by one simplex subspaces"**,*Proc. of 2006 IEEE Int. Conf. on Acoustics, Speech, and Signal Processing, (ICASSP 2006)*, vol. V, pp. 725-728, 14-19 May, 2006.**C.Kotropoulos**and**A.Papaioannou**,**"A novel-updating scheme for probabilistic latent semantic indexing"**,*Proc. of 4th Panhellenic Artificial Intelligence Conf. (SETN-06)*, vol. LNAI 3966, pp. 137-147, May 19-20, 2006.**I.Kotsia**and**I.Pitas**,**"Facial expression recognition using shape and texture information"**,*Proc. of Int. Federation for Information Processing Conf. on Artificial Intelligence (IFIPAI 2006)*, 21-24 August, 2006.**I.Kotsia**,**N.Nikolaidis**and**I.Pitas**,**"Fusion of Geometrical and Texture information for facial expression recognition"**,*Proc. of Int. Conf. on Image Processing (ICIP 2006)*, 8-11 October, 2006.**M.Kotti**,**E.Benetos**,**C.Kotropoulos**and**L.G.Martins**,**"Speaker Change Detection using BIC: A comparison on two datasets"**,*Proc. of Int. Symposium Communications, Control and Signal Processing, 2006 (ISCCSP 2006)*, 13-15 March, 2006.**M.Kotti**,**E.Benetos**and**C.Kotropoulos**,**"Automatic Speaker Change Detection with the Bayesian Information Criterion using MPEG-7 Features and a Fusion Scheme"**,*Proc. of IEEE Int. Symposium Circuits & Systems(ISCAS 06)*, 21-24 May, 2006.**M.Kotti**,**L.Gustavo**,**P.M.Martins**,**E.Benetos**,**J.S.Cardoso**and**C.Kotropoulos**,**"Automatic speaker segmentation using multiple features and distance measures: a comparison of three approaches"**,*Proc. of 2006 IEEE Int. Conf. on Multimedia and Expo (ICME 2006), Toronto*, pp. 1101-1104, 9-12 July, 2006.**M.Kotti**,**C.Kotropoulos**,**B.Ziolko**,**I.Pitas**and**V.Moschou**,**"A framework for dialogue detection in movies"**,*Lecture Notes in Computer Science, Multimedia Content Representation, Classification, and Security*, vol. 4105, pp. 371-378, September 11-13, 2006.**O.Martin**,**I.Kotsia**and**B.Macq**,**"The eNTERFACE'05 Audio-Visual Emotion Database"**,*Proc. of the First IEEE Int. Workshop on Multimedia Databases and Data Management (IEEE-MDDM 2006), Georgia*, 8 April, 2006.**V.Moschou**,**D.Ververidis**and**C.Kotropoulos**,**"On the variants of the self-organizing map that are based on order statistics"**,*Proc. of Int. Conf. on Artificial Neural Networks (ICANN 2006)*, pp. 425-434, September, 2006.**S.Nikolopoulos**,**S.Zafeiriou**,**N.Nikolaidis**and**I.Pitas**,**"Image Replica detection using R-tress and Linear Discriminant Analysis"**,*Proc. of the IEEE Int. Conf. on Multimedia and Expo (ICME 2006), Toronto Ontario*, 9-12 July, 2006.**A.Roubies**,**A.Hajdu**and**I.Pitas**,**"Improving Concavity Performance of Snake Algorithms"**,*Proc. of Int. Symposium Communications, Control and Signal Processing (ISCCSP 2006)*, 13-15 March, 2006.**S.Siatras**and**N.Nikolaidis**,**"Visual speech detection using mouth region intensities"**,*Proc. of European Signal Processing Conf. (EUSIPCO 2006)*, 4-8 September, 2006.**Z.Theodosiou**,**I.Kasampalidis**,**G.Karayannopoulou**,**I.Kostopoulos**,**P.Aretini**and**F.Acardillo**,**"Evaluation of automated FISH image analysis software on 60 breast carcinoma cases"**,*Meeting on BioInformatics and Medical Informatics*, October 4-5, 2006.**D.Ververidis**and**C.Kotropoulos**,**"Fast Sequential Floating Forward Selection applied to emotional speech features estimated on DES and SUSAS data collections"**,*Proc. of European Signal Processing Conf. (EUSIPCO 2006)*, 4-8 September, 2006.**M.Haindl**,**P.Somol**,**D.Ververidis**and**C.Kotropoulos**,**"Feature Selection Based on Mutual Correlation"**,*Lecture Notes in Computer Science, Progress in Pattern Recognition, Image Analysis, and Applications*, vol. 4225, pp. 569-577, November, 2006.**N.Vretos**,**V.Solachidis**and**I.Pitas**,**"A Mutual Information Based Algorithm for Face Clustering"**,*Proc. of Int. Conf. on Multimedia and Expo (ICME 2006)*, 9-12 July, 2006.**E.Ziogas**and**C.Kotropoulos**,**"Detection of vocal fold paralysis and edema using linear discriminant classifiers"**,*Proc. of 4th Panhellenic Artificial Intelligence Conf. (SETN-06)*, vol. LNAI 3966, pp. 454-464, May 19-20, 2006.**Y.Maret**,**S.Nikolopoulos**,**F.Dufaux**,**T.Ebrahimi**and**N.Nikolaidis**,**"A Novel Replica Detection System Using Binary Classifiers, R-Trees, and PCA"**,*2006 IEEE International Conference on Image Processing (ICIP 2006)*, pp. 925-928, 2006.**N.Nikolaidis**and**I.Pitas**,**"Image and video fingerprinting for digital rights management of multimedia data"**,*2006 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS 2006)*, pp. 801-807, 2006 (invited paper).**E.Loutas**,**N.Nikolaidis**and**I.Pitas**,**"A mutual information approach to contour based object tracking"**,*2006 EURASIP European Signal Processing Conference (EUSIPCO 2006)*, 2006.**N.Nikolaidis**and**I.Pitas**,**"Using Spanning Trees for Reduced Complexity Image Mosaicing"**,*2006 EURASIP European Signal Processing Conference (EUSIPCO 2006)*, 2006.**I.Kasampalidis**,**I.Pitas**and**K.Lyroudia**,**"Statistical Conservation Analysis of Zinc-interacting Residues"**,*Proc. of Workshop on Computational Systems Biology,Tampere*, pp. 41-44, June, 2006.**I.Marras**,**L.Papaleontiou**,**N.Nikolaidis**,**K.Lyroudia**and**I.Pitas**,**"Virtual Dental Patient: A System for Virtual Teeth Drilling"**,*Proc. of 2006 IEEE International Conference on Multimedia and Expo (ICME 06)*, 2006.**I.Marras**,**L.Papaleontiou**,**N.Nikolaidis**,**K.Lyroudia**and**I.Pitas**,**"A Virtual Reality Tooth Drilling Simulator"**,*Proc. of Spring Conference on Computer Graphics 2006*, pp. 49-52, 2006.**A.Bogan-Marta**,**N.Laskaris**,**I.Pitas**and**K.Lyroudia**,**"Statistical method of context evaluation for biological sequence similarity."**,*IFIP*, August, 2006.

**F.Albu**and**C.Kotropoulos**,**"Modified Gauss-Seidel affine projection algorithm for acoustic echo cancellation"**,*Proc. of 2005 IEEE Int. Conf. Acoustics, Speech, and Signal Processing*, vol. 3, pp. 121-124, 18-23 March, 2005.**F.Albu**and**C.Kotropoulos**,**"Coordinate descent iterations in pseudo affine projection algorithm"**,*Proc. of 2005 IEEE Int. Symp. Circuits and Systems*, pp. 2283-2286, 23-26 May, 2005.**F.Albu**,**C.Kotropoulos**,**Z.Cernekova**and**I.Pitas**,**"New affine projection algorithms based on Gauss-Seidel method"**,*Proc. of 2005 IEEE Int. Symp. Signals, Circuits, and Systems (ISSCS 2005)*, pp. 565-568, July, 2005.**G.Almpanidis**and**C.Kotropoulos**,**"Combined text and link analysis for focused crawling"**,*Proc. of Int. Conf. Advances in Pattern Recognition (ICAPR 2005)*, vol. LNCS 3686, part I, pp. 278-287, August, 2005.**G.Almpanidis**,**C.Kotropoulos**and**I.Pitas**,**"Focused crawling using latent semantic indexing- An application for vertical search engines"**,*Proc. of 2005 European Conf. Digital Libraries (ECDL 2005)*, vol. LNCS 3652, pp. 402-413, September, 2005.**N.Bassiou**and**C.Kotropoulos**,**"Interpolated Distanced Bigram Language Models for Robust Word Clustering"**,*Proc. of IEEE Int. Workshop on Nonlinear Signal and Image Processing (NSIP 2005)*, 18-20 May, 2005.**E.Benetos**,**M.Kotti**,**C.Kotropoulos**,**J.J.Burred**,**G.Eisenberg**,**M.Haller**and**T.Sikora**,**"Comparison of Subspace Analysis-Based and Statistical Model-Based Algorithms for Musical Instrument Classification"**,*Proc. of 2nd Workshop On Immersive Communication And Broadcast Systems (ICOB 2005)*, October, 2005.**A.Bogan-Marta**,**N.Laskaris**,**M.Gavrielides**,**I.Pitas**and**K.Lyroudia**,**"A novel efficient protein similarity measure based on n-gram modeling."**,*Proc. of IEE Second Int. Conf. on Computational Intelligence in Medicine and Healthcare (CIMED 2005) , Costa da Caparica*, 29th June-1st July, 2005.**I.Buciu**,**I.Kotsia**and**I.Pitas**,**"Facial expression analysis under partial occlusion"**,*Proc. of IEEE Int. Conf. on Acoustics, Speech and Signal Processing, ICASSP 2005*, 18-23 March, 2005.**Z.Cernekova**,**C.Kotropoulos**,**N.Nikolaidis**and**I.Pitas**,**"Video shot segmentation using fusion of SVD and mutual information features"**,*Proc. of IEEE Int. Symposium on Circuits and Systems (ISCAS 2005)*, pp. 3849-3852, 23-26 May, 2005.**C.Cotsaces**,**M.Gavrielides**and**I.Pitas**,**"A Survey of Recent Work"**,*Proc. of 2005 Workshop on Audio-Visual Content and Information Visualization in Digital Libraries (AVIVDiLib '05)*, 4-6 June, 2005.**C.Cotsaces**,**N.Nikolaidis**and**I.Pitas**,**"The use of face indicator functions for video indexing and fingerprinting"**,*Proc. of Int. Workshop on Content-Based Multimedia Indexing (CBMI 2005)*, 21-23 June, 2005.**L.Goldmann**,**M.Krinidis**,**N.Nikolaidis**,**S.Asteriadis**and**T.Sikora**,**"An Integrated System for Face Detection and Tracking"**,*ICOB2005*, 27-28 October, 2005.**I.Kotsia**and**I.Pitas**,**"Real time facial expression recognition from video sequences using Support Vector Machines"**,*Proc. of Visual Communications and Image Processing (VCIP 2005)*, 12-15 July, 2005.**I.Kotsia**and**I.Pitas**,**"Real time facial expression recognition from image sequences using Support Vector Machines"**,*Proc. of IEEE Int. Conf. on Image Processing (ICIP 2005)*, 11-14 September, 2005.**M.Krinidis**,**G.Stamou**,**H.Teutsch**,**S.Spors**,**N.Nikolaidis**,**R.Rabenstein**and**I.Pitas**,**"An Audio-Visual Database For Evaluating Person Tracking Algorithms"**,*Proc. of IEEE Int. Conf. Acoustics, Speech and Signal Processing, ICASSP 2005*, vol. 2, pp. 237-240, 18 -23 March, 2005.**M.Krinidis**,**N.Nikolaidis**and**I.Pitas**,**"Feature-based tracking using 3D physics-based deformable surfaces"**,*Proc. of 2005 EURASIP European Signal Processing Conference (EUSIPCO 2005)*, 4-8 September, 2005.**K.Kucharski**,**W.Skarbek**,**G.Stamou**,**N.Nikolaidis**and**I.Pitas**,**"Morphological and AdaBoost Face Detectors Comparison"**,*Proc. of Workshop on Immersive Communication and Broadcast Systems (ICOB 2005)*, 27-28 October, 2005.**M.Kyperountas**,**A.Tefas**and**I.Pitas**,**"Methods for improving discriminant analysis for face authentication"**,*Proc. of IEEE Int. Conf. on Acoustics, Speech and Signal Processing, ICASSP 2005*, 18-23 March, 2005.**Y.Maret**,**S.Nikolopoulos**,**F.Dufaux**,**C.Cotsaces**,**T.Ebrahimi**and**N.Nikolaidis**,**"Reduced Complexity Replica Detection Systems Using Binary Classifiers and R-Trees"**,*Proc. of Workshop on Immersive Communication and Broadcast Systems (ICOB 2005)*, 27-28 October, 2005.**Ι.Μαρράς**,**Γ.Μόσχος**,**Γ.Μικρογεώργης**and**Κ.Λυρούδια**,**"Δημιουργία κεφαλής εικονικού οδοντιατρικού ασθ"**,*Proc. of Πανελλήνιο Οδοντιατρικό Συνέδριο*, 2005.**A.Moskofidis**and**N.Nikolaidis**,**"3D Face reconstruction from uncalibrated image sets"**,*Proc. of Third COST 275 WORKSHOP , University of Hertfordshire*, 27-28 October, 2005.**N.Nikolaidis**and**I.Pitas**,**"Computationally Efficient Image Mosaicing Using Spanning Tree Representations"**,*Lecture Notes in Computer Science, Advances in Informatics: 10th Panhellenic Conf. on Informatics, PCI 2005*, 11-13 November, 2005.**V.Rodriguez-Doncel**,**N.Nikolaidis**and**I.Pitas**,**"Watermarking Polygonal Lines Using an Optimal Detector on the Fourier Descriptors Domain"**,*Proc. of 2005 EURASIP European Signal Processing Conf. (EUSIPCO 2005)*, 4-8 September, 2005.**P.Rotter**,**A.Skulimowski**,**C.Kotropoulos**and**I.Pitas**,**"Fast shape matching with the Haussdorff distance for pixel-represented objects"**,*Proc. of MIRAGE 2005*, 1-2 March, 2005.**V.Solachidis**and**I.Pitas**,**"Watermarking digital 3D volumes in the Discrete Fourier Transform domain"**,*Proc. of IEEE Int. Conf. on Multimedia and Expo (ICME 2005)*, 6-8 July, 2005.**V.Solachidis**,**S.Tsekeridou**,**S.Nikolopoulos**and**I.Pitas**,**"Self-Similar watermarks for counterfeiting geometrical attacks"**,*Proc. of 1st WAVILA CHALLENGE (WaCha 2005)*, 8-9 June, 2005.**G.Stamou**,**M.Krinidis**,**N.Nikolaidis**and**I.Pitas**,**"A monocular system for automatic face detection and tracking"**,*Proc. of Visual Communications and Image Processing (VCIP 2005)*, 12-15 July, 2005.**G.Stamou**,**N.Nikolaidis**and**I.Pitas**,**"Object Tracking based on Morphological Elastic Graph Matching"**,*Proc. of 2005 IEEE Int. Conf. on Image Processing (ICIP 2005)*, 11-14 September, 2005.**G.Stamou**,**N.Nikolaidis**and**I.Pitas**,**"Object Tracking based on Multiscale Morphological Templates"**,*Proc. of 2005 EURASIP European Signal Processing Conf. (EUSIPCO 2005)*, 4-8 September, 2005.**G.Stamou**,**N.Nikolaidis**and**I.Pitas**,**"Multiview Videodatasets for Evaluation and Testing of 3D Tracking and 3D Reconstruction Algorithms"**,*Proc. of Workshop on Immersive Communication and Broadcast Systems (ICOB 2005)*, 27-28 October, 2005.**D.Ververidis**and**C.Kotropoulos**,**"Emotional speech classification using Gaussian mixture models"**,*Proc. of 2005 IEEE Int. Symposium Circuits and Systems (ISCAS 2005)*, pp. 2871-2874, May, 2005.**D.Ververidis**and**C.Kotropoulos**,**"Emotional speech classification using gaussian mixture models and the sequential floating forward selection algorithm"**,*Proc. of 2005 IEEE Int. Conf. on Multimedia and Expo (ICME 2005)*, 6-8 July, 2005.**D.Ververidis**and**C.Kotropoulos**,**"Sequential Forward Feature Selection with Low Computational Cost"**,*Proc. of 8th European Signal Processing Conf.*, 4-8 September, 2005.**N.Vretos**,**V.Solachidis**and**I.Pitas**,**"An Anthropocentric Description Scheme For Movies Content Classification And Indexing"**,*Proc. of European Signal Processing Conf. (EUSIPCO 2005)*, 4-8 September, 2005.**N.Vretos**,**V.Solachidis**and**I.Pitas**,**"An MPEG-7 Based Description Scheme For Video Analysis using Anthropocentric Video Content Descriptors"**,*Lecture Notes in Computer Science, Advances in Informatics: 10th Panhellenic Conf. on Informatics, PCI 2005*, vol. 3746 / 2005, 11-13 November, 2005.**S.Zafeiriou**,**A.Tefas**and**I.Pitas**,**"Elastic Graph Matching versus Linear Subspace Methods for Frontal Face Verification"**,*Proc. of IEEE Int. Workshop on Nonlinear Signal and Image Processing (NSIP 2005)*, 18-20 May, 2005.**S.Zafeiriou**,**A.Tefas**and**I.Pitas**,**"Exploiting Discriminant Information in Elastic Graph Matching"**,*Proc. of IEEE Int. Conf. on Image Processing (ICIP 2005)*, 11-14 September, 2005.**S.Zafeiriou**,**A.Tefas**and**I.Pitas**,**"Linear Discriminant Feature Selection Techniques in Elastic Graph Matching"**,*Proc. of EURASIP European Signal Processing Conf. (EUSIPCO 2005)*, 4-8 September, 2005.**S.Zafeiriou**,**A.Tefas**,**I.Buciu**and**I.Pitas**,**"Class-Specific Discriminant Non-negative Matrix Factorization for Frontal Face Verification"**,*Proc. of Int. Conf. Advances in Pattern Recognition (ICAPR 2005)*, 22-25 August, 2005.**S.Zafeiriou**,**A.Tefas**and**I.Pitas**,**"Discriminant NMFfaces for Frontal Face Verification"**,*Proc. of IEEE Int. Workshop on Machine Learning for Signal Processing (MLSP 2005)*, 28-30 September, 2005.**A.Tefas**,**A.Giannoula**,**N.Nikolaidis**and**I.Pitas**,**"Enhanced transform-domain correlation-based audio watermarking"**,*Proc. of IEEE Int. Conf. on Acoustics, Speech and Signal Processing, ICASSP 2005*, 18-23 March, 2005.**A.Bogan-Marta**,**M.Gavrielides**,**I.Pitas**and**K.Lyroudia**,**"A New Statistical Measure of Protein Similarity based on Language Modeling"**,*Proc. of IEEE Int. Workshop on Genomic Signal Processing and Statistics (GENSIPS 2005)*, 22-24 May, 2005.**F.Raimondo**,**M.Gavrielides**,**G.Karayannopoulou**,**K.Lyroudia**,**I.Pitas**and**I.Kostopoulos**,**"Automated Classification of Fluorescent in Situ cases based on HER-2/NEU status"**,*Proc. of 2005 EURASIP European Signal Processing Conf. (EUSIPCO 2005)*, 4-8 September, 2005.**F.Raimondo**,**M.Gavrielides**,**G.Karayannopoulou**,**K.Lyroudia**,**I.Pitas**and**I.Kostopoulos**,**"Computer-aided Evaluation of HER-2 Status in Fluorescent in Situ Hybridization Images"**,*Proc. of 2nd Int. Conf. on Computational Intelligence in Medicine and Healthcare, Costa da Caparica*, 29th June-1st July, 2005.**Z.Theodosiou**,**F.Raimondo**,**M.E.Garefalaki**,**G.Karayannopoulou**,**K.Lyroudia**and**I.Pitas**,**"Fish Image Analysis System for Breast Cancer Studies"**,*Proc. of European Conf. on Emergent Aspects in Clinical Data Analysis (EACDA 2005)*, 28-30 September, 2005.**V.C.Kelessidis**,**M.Zervakis**and**Z.Theodosiou**,**"System for collection and analysis of analog camera signal for studying solid motion during two-phase flow in horizontal annulus"**,*5th Panhellenic Symposium of Chemical Engineering*, May 26-28, 2005.

**D.Ververidis**and**C.Kotropoulos**,**"Automatic speech classification to five emotional states based on gender information"**,*Proc. XII European Signal Processing Conf.*, pp. 341-344, September, 2004.**I.Buciu**and**I.Pitas**,**"Application of non-negative and local non negative matrix factorization to facial expression recognition"**,*Proc. of 17th Int. Conf. on Pattern Recognition (ICPR 2004)*, 23-26 August, 2004.**I.Buciu**and**I.Pitas**,**"A new sparse image representation algorithm applied to facial expression recognition"**,*Proc. of IEEE Int. Workshop on Machine Learning for Signal Processing (MLSP 2004)*, 29 September- 1 October, 2004.**S.Krinidis**and**I.Pitas**,**"2D Physics-based deformable objects using fast free vibration modal analysis"**,*Proc. of ISCAS 2004*, May, 2004.**M.Kyperountas**,**Z.Cernekova**,**C.Kotropoulos**,**M.Gavrielides**and**I.Pitas**,**"Audio PCA in a novel multimedia scheme for scene change detection"**,*Proc. of ICASSP 2004*, vol. IV, pp. 353-356, May, 2004.**M.Kyperountas**,**Z.Cernekova**,**C.Kotropoulos**,**M.Gavrielides**and**I.Pitas**,**"Scene change detection using audiovisual clues"**,*Proc. of Norwegian Conf. on Image Processing and Pattern Recognition (NOBIM 2004)*, 27-28 May, 2004.**C.Laftsidis**,**C.Kotropoulos**and**I.Pitas**,**"MPEG-4 compliant reproduction of face animation created in MAYA"**,*Proc. of 2004 IEEE Int. Conf. Multimedia and Expo (ICME '04)*, 27-30 June, 2004.**E.Loutas**,**N.Nikolaidis**and**I.Pitas**,**"Evaluation of tracking reliability metrics based on information theory and normalized correlation"**,*Proc. of IEEE Int. Conf. on Pattern Recognition (ICPR 2004)*, 23-26 August, 2004.**M.Marinaki**,**C.Kotropoulos**,**I.Pitas**and**N.Maglaveras**,**"Automatic detection of vocal fold paralysis and edema"**,*Proc. of 8th Int. Conf. Spoken Language Processing (INTERSPEECH 2004)*, pp. 537-540, October, 2004.**A.Markoulidis**,**A.Tefas**,**C.Kotropoulos**and**I.Pitas**,**"Turning a frontal face verification technique to a system prototype"**,*CD-ROM Proc. of 2nd COST275 Workshop Biometrics on the Internet*, 2004.**G.Moschos**,**N.Nikolaidis**and**I.Pitas**,**"Anatomically-based 3D face and oral cavity mode for creating virtual medical patients"**,*Proc. of IEEE Int. Conf. on Multimedia & Expo (ICME 2004)*, 27-30 June, 2004.**R.Rispoli**,**C.Kotropoulos**and**I.Pitas**,**"Searching relevant syllable context by clustering for alignment in modern Greek speech"**,*Proc. of 2004 IEEE Int. Conf. Multimedia and Expo (ICME '04)*, 2004.**R.Rispoli**,**C.Kotropoulos**and**I.Pitas**,**"Towards a New Architecture for Computerized Greek Speech Phonetic Alignment"**,*Proc. 24th Annual Workshop Linguistics*, 2004 (abstract).**E.Sikudova**and**M.Gavrielides**,**"Extracting semantic information from art images"**,*Proc. of Int. Conf. on Computer Vision and Graphics 2004 (ICCVG 2004)*, 22-24 September, 2004.**V.Solachidis**,**A.Nikolaidis**and**I.Pitas**,**"Optimal watermark detectors"**,*Proc. of Norwegian Conf. on Image Processing and Pattern Recognition (NOBIM 2004)*, 27-28 May, 2004.**A.Tefas**and**N.Nikolaidis**,**"Chaotic watermark sequences for correlation-based schemes"**,*Proc. of 12th European Signal Processing Conf. EUSIPCO2004)*, pp. 1891-1894, 6-10 September, 2004.**D.Ververidis**,**C.Kotropoulos**and**I.Pitas**,**"Automatic emotional speech classification"**,*Proc. of ICASSP 2004*, vol. I, pp. 593-596, May, 2004.**D.Ververidis**,**"Automatic Speech Classification to five emotional states based on gender information"**,*Proc. of 12th European Signal Processing Conf. (EUSIPCO '04)*, pp. 341-344, September, 2004.**S.Zafeiriou**,**A.Tefas**and**I.Pitas**,**"A Blind Robust Watermarking Scheme for Copyright Protection of 3D Mesh Models"**,*Proc. of IEEE Int. Conf. on Image Processing (ICIP 2004)*, 24-27 October, 2004.

**A.Barmpoutis**,**N.Nikolaidis**and**I.Pitas**,**"Face 3D Pose Estimation using a Generic 3D Face Model and Facial Features Extraction"**,*Proc. of 9th Panhellenic Conf. on Informatics (PCI `03)*, pp. 519-526, 21-23 November, 2003.**I.Buciu**,**C.Kotropoulos**and**I.Pitas**,**"ICA and Gabor representation for facial expression recognition"**,*Proc. of 2003 IEEE Int. Conf. Image Processing*, vol. 2, pp. 855-858, September, 2003.**I.Buciu**,**I.Kotsia**and**I.Pitas**,**"Recognition of facial expressions in presence of partial occlusion"**,*Proc. of 9th Panhellenic Conf. onInformatics (PCI `03)*, 21-23 November, 2003.**Z.Cernekova**,**C.Kotropoulos**and**I.Pitas**,**"Video Shot Segmentation using Singular Value Decomposition"**,*Proc. of 2003 IEEE Int. Conf. Acoustics, Speech, and Signal Processing*, vol. III, pp. 181-184, April, 2003 (appears also in Proc. IEEE Multimedia and Expo 2003, pp. 301-304, Baltimore, July 2003).**Z.Cernekova**,**C.Kotropoulos**and**I.Pitas**,**"Video Shot Boundary Detection using Singular Value Decomposition"**,*Proc. of 4th European Workshop on Image Analysis for Multimedia Interactive Services (WIAMIS-2003)*, April, 2003.**A.Digka**,**K.Lyroudia**,**G.Karayannopoulou**,**L.Kubinova**,**S.Krinidis**and**I.Pitas**,**"3D reconstructions of 2 vascular plexuses of human dental pulps by using confocal microscopy"**,*Proc. of 11th Biennal Congress of the ESE*, 2-4 October, 2003.**A.Giannoula**,**A.Tefas**,**N.Nikolaidis**and**I.Pitas**,**"Improving the Detection Reliability of Correlation-based Watermarking Techniques"**,*Proc. of IEEE Int. Conf. on Multimedia and Expo 2003(ICME2003), Baltimore*, 6-9 July, 2003.**A.Georgakis**,**C.Kotropoulos**and**I.Pitas**,**"A combination of R-estimates and Wilcoxon test for document organization and retrieval"**,*Proc. of IEEE-EURASIP Workshop Nonlinear Signal and Image Processing*, May, 2003.**A.Kalivas**,**A.Tefas**and**I.Pitas**,**"Watermarking of 3D models using Principal Component Analysis"**,*Proc. of 2003 IEEE Int. Conf. on Acoustics, Speech and Signal Processing (ICASSP 2003) and in Proc. of 2003 IEEE Int. Conf. on Multimedia and Expo (ICME2003)*, 6-9 July, 2003.**C.Kotropoulos**,**A.Fazekas**and**I.Pitas**,**"Fast multiscale mathematical morphology for frontal face authentication"**,*Proc. of IEEE-EURASIP Workshop Nonlinear Signal and Image Processing*, May, 2003.**G.Kovasznai**,**C.Kotropoulos**and**I.Pitas**,**"CAML- A Universal Configuration Language for Dialogue Systems"**,*Proc. of 2003 Database and Expert Systems Applications (DEXA)*, pp. 896-906, September, 2003.**G.Kovasznai**,**C.Kotropoulos**and**I.Pitas**,**"A novel Universal Language for Configurating Dialogue Systems"**,*Proc. of 9th Panhellenic Conf. on Informatics (PCI `03)*, pp. 36-45, 21-23 November, 2003.**G.Kovasznai**,**C.Kotropoulos**and**I.Pitas**,**"Partly specified priority patterns in natural language parsing within dialog systems"**,*Proc. of 1st Int. Workshop RichMedia*, pp. 161-168, October, 2003.**S.Krinidis**,**I.Buciu**and**I.Pitas**,**"Facial Expression Analysis and Synthesis: A Survey"**,*Proc. of 10th Int. Conf.on "Human- Computer Interaction" (HCI 2003), Crete, Greece*, vol. IV, 22-27 June, 2003.**S.Krinidis**and**I.Pitas**,**"2D Physics-Based Deformable Shape Models: Explicit Governing Equations"**,*Proc. of First Int. Workshop on "interactive Rich Media Content Production: Architectures, Technologies, Applications, Tools", Lausanne*, 16-17 October, 2003.**C.Laftsidis**,**A.Tefas**,**N.Nikolaidis**and**I.Pitas**,**"Robust Multibit Audio Watermarking in the Temporal Domain"**,*Proc. of 2003 IEEE Int. Symposium on Circuits and Systems*, May 25-28, 2003.**C.Laftsidis**,**C.Kotropoulos**and**I.Pitas**,**"MPEG-4 Compliant Information Extraction from an Animated Face in Maya"**,*Proc. of 1st Richmedia Conf.*, pp. 131-137, October, 2003.**E.Loutas**,**N.Nikolaidis**and**I.Pitas**,**"A mutual information approach to articulated object tracking"**,*Proc. of Int. Symposium on Circuits and Systems (ISCAS '03)*, vol. 2, 25-28 May, 2003.**G.Mikrogeorgis**,**K.Lyroudia**,**I.Molyvdas**and**I.Pitas**,**"Study of two root canal instrumentation techniques using digital image processing"**,*Proc. of 11th Biennal Congress of the ESE*, 2-4 October, 2003.**E.Sikudova**,**M.Gavrielides**and**I.Pitas**,**"Automatic identification of portraits in art images databases"**,*Proc. of MDL DELOS workshop*, June, 2003.**V.Solachidis**and**I.Pitas**,**"Optimal detection for multiplicative watermarks embedded in DFT domain"**,*Proc. of IEEE Int. Conf. on Image Processing (ICIP 2003)*, pp. 723 -726, 14-17 September, 2003.**V.Solachidis**and**I.Pitas**,**"Non-linear detector of watermarked signal embedded in fourier domain"**,*Proc. of EURASIP Workshop on,Nonlinear Signal and Image Processing*, 8-11 June, 2003.**V.Solachidis**,**A.Nikolaidis**and**I.Pitas**,**"Optimal watermark detectors for transform domain watermarking"**,*Proc. of Int. Conf. on Number Theory for Secure Communications*, 20-21 December, 2003.**D.Ververidis**and**C.Kotropoulos**,**"A Review of Emotional Speech Databases"**,*Proc. of 9th Panhellenic Conf. on Informatics (PCI `03)*, pp. 560-574, 21-23 November, 2003.**D.Ververidis**and**C.Kotropoulos**,**"A State of the Art Review on Emotional Speech Databases"**,*Proc. of 1st Richmedia Conf.*, pp. 109-119, October, 2003.**S.Zafeiriou**,**A.Kalivas**,**A.Tefas**,**N.Nikolaidis**and**I.Pitas**,**"Watermarking of 3D mesh models robust to basic geometric transformations"**,*Proc. of 9th Panhellenic Conf. on Informatics (PCI `03)*, 21-23 November, 2003.**A.Digka**,**K.Lyroudia**,**G.Karagianopoulou**,**L.Kubinova**,**S.Krinidis**and**I.Pitas**,**"3D reconstructions of 2 vascular plexuses of human dental pulps by using confocal microscopy"**,*11ο Biennal Congress of the ESE*, 2-4 October, 2003.**Γ.Μικρογεώργης**,**Κ.Λυρούδια**,**Ι.Μολυβδάς**and**Ι.Πήτας**,**"Μελέτη της εξέλιξης περιακρορριζικών αλλοιώσεω"**,*23ο Πανελλήνιο Οδοντιατρικό Συνέδριο*, 30 Οκτωβρίο, 2003.

**I.Buciu**,**C.Kotropoulos**and**I.Pitas**,**"On the stability of support vector machines for face detection"**,*Proc. of 2002 IEEE Int. Conf. on Image Processing*, vol. 3, pp. 121-124, 2002.**I.Buciu**,**C.Kotropoulos**and**I.Pitas**,**"Face detection by using Independent Component Decomposition"**,*Proc. of Dynamic Perception 2002*, pp. 247-252, 2002.**Z.Cernekova**,**C.Nikou**and**I.Pitas**,**"Shot Detection in Video Sequences using Entropy-based metrics"**,*Proc. of IEEE Int. Conf. on Image Processing 2002 (ICIP2002)*, vol. 3, pp. III-421 - III-424, 22-25 September, 2002.**Z.Cernekova**,**C.Nikou**and**I.Pitas**,**"Entropy Metrics used for Video Summarization"**,*Proc. of Int. Spring Conf. on Computer Graphics 2002*, pp. 73-82, 2002 (publisher ACM Press).**J.-L.Dugelay**,**J.-C.Junqua**,**C.Kotropoulos**,**R.Kuhn**,**F.Perronnin**and**I.Pitas**,**"Recent advances in biometric person authentication"**,*Proc. of 2002 Int. Conf. On Acoustics,Speech and Signal Processing*, vol. 4, pp. 4060-4063, 2002.**A.Fazekas**,**I.Buciu**,**C.Kotropoulos**and**I.Pitas**,**"Support vector machines for face detection"**,*Proc. of the Hungarian Conf. on Pattern Recognition*, January, 2002.**A.Giannoula**,**N.Nikolaidis**and**I.Pitas**,**"Watermarking of Sets of Polygonal Lines using Fusion Techniques"**,*Proc. of IEEE Int. Conf. on Multimedia and Expo 2002 (ICME2002)*, vol. 2, pp. 549-552, 26-29 August, 2002.**A.Georgakis**,**C.Kotropoulos**and**I.Pitas**,**"A SOM variant based on the Wilcoxon test for document organization and retrieval"**,*Lecture Notes in Computer Science: 2002 Int. Conf. on Artificial Neural Networks Berlin: Springer-Verlag*, vol. 2415, pp.993-998, 2002.**M.Gordan**,**C.Kotropoulos**and**I.Pitas**,**"A Temporal network of support vector machine classifiers for the recognition of visual speech, in Lecture Notes in Artificial Intelligence"**,*Lecture Notes in Artificial Intelligence, Proceedings SETN-02*, vol. 2308, pp. 355-365, April, 2002.**M.Gordan**,**C.Kotropoulos**,**A.Georgakis**and**I.Pitas**,**"A new fuzzy C-means based segmentation strategy. Applications to lip region identification"**,*Proc. of A&QT-R 2002(THETA 13) 2002 IEEE TTTC Int. Conf. on Automation, Quality and Testing, Robotics*, 23-25 May, 2002.**M.Gordan**,**C.Kotropoulos**and**I.Pitas**,**"Visual speech recognition using support vector machines"**,*Proc. of the 14th Int. Conf. on Digital Signal Processing*, vol. 2, pp. 1093-1096, July, 2002.**M.Gordan**,**C.Kotropoulos**and**I.Pitas**,**"Application of support vector machines classifiers to visual speech recognition"**,*Proc. of 2002 IEEE Int. Conf. on Image Processing*, vol. 3, pp. 129-132, 2002.**C.Kotropoulos**and**I.Pitas**,**"Signal detection using support vector machines in the presence of ultrasonic speckle"**,*Proc. of SPIE Int. Symp. on Medical Imaging 2002*, vol. SPIE 4687, February, 2002.**S.Krinidis**,**C.Nikou**and**I.Pitas**,**"3D Volume Reconstruction by Serially Acquired 2D slices using a Distance Transform-Based Global Cost Function"**,*Proc. of 2nd Hellenic Conf. on Artificial Intelligence (SETN02)*, pp. 390-400, 11-12 April, 2002.**S.Krinidis**,**C.Nikou**and**I.Pitas**,**"3D Physics-Based Reconstruction of Serially Acquired Slices"**,*Proc. of IEEE Int. Conf. on Multimedia and Expo (ICME02)*, vol. 1, pp. 877-880, 26-29 August, 2002.**G.Louizis**,**A.Tefas**and**I.Pitas**,**"Copyright Protection of 3D Images using Watermarks of Specific Spatial Structure"**,*Proc. of IEEE Int. Conf. on Multimedia and Expo 2002 (ICME2002)*, vol. 2, pp. 557-560, 26-29 August, 2002.**E.Loutas**,**C.Nikou**and**I.Pitas**,**"Information theory-based analysis of partial and total occlusion in object tracking"**,*Proc. of the 2002 Int. Conf. on Image Processing*, 2002.**E.Loutas**,**C.Nikou**and**I.Pitas**,**"An information theoretic approach to joint probabilistic face detection and tracking"**,*Proc. of the 2002 Int. Conf. on Image Processing*, 2002.**E.Loutas**,**C.Kotropoulos**,**N.Bassiou**and**I.Pitas**,**"Frontal face detection algorithms based on support vector machines and maximum likehood"**,*CD-ROM Proc. of COST-275 Workshop: The Advent of Biometric over the Internet*, pp. 61-64, November, 2002.**N.Nikolaidis**,**V.Solachidis**,**A.Tefas**,**V.Arguriou**and**I.Pitas**,**"Benchmarking of Still Image Watermarking Methods: Principles and State of the Art"**,*Proc. of Electronic Imaging & the Visual Arts 2002 (EVA2002)*, 18-22 March, 2002.**N.Nikolaidis**,**V.Solachidis**,**A.Tefas**and**I.Pitas**,**"Watermark Detection: Benchmarking Perspectives"**,*Proc. of IEEE Int. Conf. on Multimedia and Expo 2002(ICME2002), Special Session on Benchmarking of Data Hiding Technologies*, vol. 2, pp. 493-496, 26-29 August, 2002.**A.Nikolaidis**and**I.Pitas**,**"Optimal Detector Structure for DCT and Subband Domain Watermarking"**,*Proc. of IEEE Int. Conf. on Image Processing 2002 (ICIP2002)*, vol. 3, pp. III-465 - III-468, 22-25 September, 2002.**A.Tefas**,**G.Louizis**and**I.Pitas**,**"3D Image Watermarking robust to Geometric Distortions"**,*Proc. of IEEE Int. Conf. on Acoustics Speech and Signal Processing 2002 (ICASSP2002)*, vol. 4, 13-17 May, 2002.**A.Xafopoulos**,**C.Kotropoulos**,**and****I.Pitas**,**"Language identification of web documents using discrete HMMs"**,*Proc. of the 2nd Hellenic Conf. on Artificial Intelligence (SETN '02)*, pp. 269-280, April, 2002.

**A.Georgakis**,**C.Kotropoulos**and**I.Pitas**,**"Organization and retrieval of touristic information with statistical language engineering techniques"**,*Proc. 21st Annual Workshop Linguistics*, pp. 110-120, 2001 (in Greek).**C.Kotropoulos**,**P.Mavrommatides**and**I.Pitas**,**"Phones and phonemes in Modern Greek Language"**,*Proc. 21st Annual Workshop Linguistics, Aristotle Univ. of Thessaloniki*, pp. 315-326, 2001 (in Greek).**K.Lyroudia**,**P.Bakaloudi**,**G.Mikrogeorgis**,**E.Kechagias**,**N.Nikolaidis**and**I.Pitas**,**"Virtual endodontics: three-dimensional teeth volume representations and their pulp cavity access"**,*Proc. of 5th Endodontic World Congress of I.F.E.A.*, 13-16 June, 2001.**G.Mikrogeorgis**,**K.Lyroudia**and**I.Pitas**,**"A method of digital radiographic evaluation of the progress of periapical lesions"**,*Proc. of 5th Endodontic World Congress of I.F.E.A.*, 13-16 June, 2001.**A.Tefas**,**G.Louizis**,**I.Pitas**,**N.Nikolaidis**and**K.Lyroudia**,**"Robust spatial 3D image watermarking"**,*Proc. of IEEE Int. Symposium on Signal Processing and Information Technology (ISSPIT 2001)*, pp. 229-232, 2001.**N.Bassiou**,**C.Kotropoulos**and**I.Pitas**,**"Hierarchical word clustering for relevance judgements"**,*Proc. of Workshop on Pattern Recognition in Information Systems (PRIS'01)*, pp. 139-148, 6-7 July, 2001.**N.Bassiou**,**C.Kotropoulos**,**T.Kosmidis**and**I.Pitas**,**"Frontal face detection using support vector machines and back-propagation neural networks"**,*Proc. of the 2001 IEEE Int. Conf. on Image Processing*, pp. 1026-1029, October, 2001.**I.Buciu**,**C.Kotropoulos**and**I.Pitas**,**"Combining support vector machines for accurate face detection"**,*Proc. of IEEE Int. Conf. on Image Processing (ICIP 2001)*, vol. 1, pp. 1054-1057, 7-10 October, 2001.**A.Bors**,**L.Kechagias**and**I.Pitas**,**"Virtual drilling in 3-D objects reconstructed by shape-based interpolation"**,*Proc. of 4th Int. Workshop on Visual Form*, vol. 3, 28-30 May, 2001.**A.Bors**,**L.Kechagias**and**I.Pitas**,**"Shape-based Interpolation using Morphological Morphing"**,*Proc. of IEEE Int. Conf. on Image Processing(ICIP 2001)*, 7-10 October, 2001.**C.Dalatsi**,**S.Krinidis**,**S.Tsekeridou**and**I.Pitas**,**"Use of Support Vector Machines based on Color and Motion Features for Shot Boundary Detection"**,*Proc. of Int. Symposium on Telecommunications (IST'01)*, pp. 189-192, 1-3 September, 2001.**A.Fazekas**,**C.Kotropoulos**,**I.Buciu**and**I.Pitas**,**"Support vector machines on the space of Walsh functions and their properties"**,*Proc. of 2nd Int. Symposium on Image and Signal Processing and Analysis (ISPA 2001)*, pp. 43-48, 19-21 June, 2001.**A.Fazekas**,**C.Kotropoulos**,**I.Buciu**and**I.Pitas**,**"Face detection by Support Vector Machines in the Walsh transform domain"**,*Proc. 8th Panhellenic Informatics Conf.*, vol. 2, pp. 156-164, November, 2001.**A.Georgakis**,**C.Kotropoulos**,**N.Bassiou**and**I.Pitas**,**"HYPERGEO: A data organization and retrieval system for tourist information"**,*Proc. of 2001 IASTED Int. Conf. Applied Informatics (AI 2001)*, pp. 719-724, 19-22 February, 2001.**A.Georgakis**,**C.Kotropoulos**,**A.Xafopoulos**and**I.Pitas**,**"MM-WEBSOM: A variant of WEBSOM based on order statistics"**,*CD-ROM Proc. of IEEE-EURASIP Workshop Nonlinear Signal and Image Processing*, June, 2001.**A.Georgakis**,**C.Kotropoulos**,**A.Xafopoulos**and**I.Pitas**,**"Document organization and retrieval using self-organizing maps and statistical language modeling"**,*Proc. of Workshop on Pattern Recognition in Information Systems*, pp. 149-160, July, 2001.**Α.Γεωργάκης**,**"Οργάνωση και ανάκτηση πληροφοριών τουριστικού `"**,*Πρακτικά 21ης Ετήσιας Συνάντησης του Τομέα Γλωσσο&*, σελ. 110-120, 2001.**M.Gordan**,**C.Kotropoulos**and**I.Pitas**,**"Pseudoautomatic Lip Contour Detection Based on Edge Direction Patterns"**,*Proc. of 2nd IEEE R8 - EURASIP Symposium on Image and Signal Processing and Analysis(ISPA'01)*, pp.138-143, 19-21 June, 2001.**M.Gordan**,**C.Kotropoulos**and**I.Pitas**,**"Application of directional statistics to gradient-based lip-contour extraction for speechreading"**,*Proc. 8th Panhellenic Informatics Conf.*, vol. 2, pp. 223-232, November, 2001.**L.Kechagias**,**A.Bors**and**I.Pitas**,**"Virtual Drilling in 3-D volumes"**,*Proc. of Conf. Int. on Augmented, Virtual Environments and three dimensional imaging(ICAV3D)*, 30 May-1 June, 2001.**L.Kechagias**,**A.Bors**and**I.Pitas**,**"Virtual Drilling-Sculpturing"**,*Proc. of 23rd Annual Int. Conf. of the IEEE Engineering in Medicine and Biology Society (EMBC2001)*, 25-28 October, 2001.**C.Kotropoulos**,**N.Bassiou**,**T.Kosmidis**and**I.Pitas**,**"Frontal face detection using support vector machines and back-propagation neural networks"**,*Proc. of 2001 Scandinavian Conf. on Image Analysis (SCIA'01)*, pp. 199-206, 11-14 June, 2001.**C.Kotropoulos**and**I.Pitas**,**"Theoretical analysis of Lp mean comparators"**,*CD-ROM Proc. of IEEE-EURASIP Workshop Nonlinear Signal and Image Processing*, June, 2001.**C.Kotropoulos**and**I.Pitas**,**"Eigenvalue distribution of the correlation matrix in Ll-filters"**,*CD-ROMProc. of IEEE-EURASIP Workshop Nonlinear Signal and Image Processing*, June, 2001.**Κ.Κοτρόπουλος**,**"Φθόγγοι και φωνήματα της Κοινής Νεοελληνικής"**,*Πρακτικά 21ης Ετήσιας Συνάντησης του Τομέα Γλωσσο&*, σελ. 110-120, 2001.**S.Krinidis**,**S.Tsekeridou**and**I.Pitas**,**"Multimodal Interaction for Scene Boundary Detection"**,*Proc. of IEEE Int. Conf. on Nonlinear Signal and Image Processing(NSIP01), Baltimore*, 3-6 June, 2001.**S.Krinidis**,**C.Nikou**and**I.Pitas**,**"Alignment of Serially Acquired Slices using a Global Energy Function"**,*Proc. of IEEE Int. Conf. on Engineering in Medicine and Biology Society (EMBS01)*, vol. 3, pp. 2414-2417, 25-28 October, 2001.**S.Krinidis**,**C.Nikou**and**I.Pitas**,**"A Global Energy Function for the Alignment of Serially Acquired Slices"**,*Proc. of 8th Panhellenic Conf. on Informatics*, 8-10 November, 2001.**E.Loutas**,**K.Diamantaras**and**I.Pitas**,**"Occlusion resistant object tracking"**,*Proc. of IEEE Int. Conf. on Image Processing (ICIP 2001)*, vol. 2, pp. 65-68, 7-10 October, 2001.**A.Nikolaidis**,**S.Tsekeridou**,**A.Tefas**and**V.Solachidis**,**"A survey on watermarking application scenarios and related attacks"**,*Proc. of IEEE Int. Conf. on Image Processing(ICIP 2001)*, 7-10 October, 2001.**N.Nikolaidis**and**I.Pitas**,**"Digital Image Processing in Painting Restoration and Archiving"**,*Proc. of IEEE Int. Conf. on Image Processing(ICIP 2001)*, vol. 1, pp. 586-589, 7-10 October, 2001.**V.Solachidis**,**S.Tsekeridou**,**A.Tefas**and**I.Pitas**,**"A simple benchmarking system for performance evaluation of still image watermarking methods"**,*Proc. of Int. Symposium on Telecommunications (IST'01)*, pp. 193-196, 1-3 September, 2001.**V.Solachidis**,**A.Tefas**,**N.Nikolaidis**,**S.Tsekeridou**,**A.Nikolaidis**and**I.Pitas**,**"A benchmarking protocol for watermarking methods"**,*Proc. of 2001 IEEE Int. Conf. on Image Processing(ICIP'01)*, pp. 1023-1026, 7-10 October, 2001.**A.Tefas**,**A.Nikolaidis**,**N.Nikolaidis**,**V.Solachidis**,**S.Tsekeridou**and**I.Pitas**,**"Statistical Analysis of Markov Chaotic Sequences for Watermarking applications"**,*CD-ROM Proc. of 2001 IEEE Int. Symposium on Circuits and Systems(ISCAS 2001)*, vol. 2, 6-9 May, 2001.**A.Tefas**and**I.Pitas**,**"Robust Spatial Image Watermarking using Progressive Detection"**,*CD-ROM Proc. of 2001 IEEE Int. Conf. on Acoustics,Speech and Signal Processing (ICASSP 2001)*, vol. 3, pp. 1973 -1976, 7-11 May, 2001.**A.Tefas**,**A.Nikolaidis**,**N.Nikolaidis**,**V.Solachidis**,**S.Tsekeridou**and**I.Pitas**,**"Performance Analysis of Watermarking Schemes based on Skew Tent Chaotic Sequences"**,*CD-ROM Proc. of NSIP'01, Baltimore*, 3-6 June, 2001.**A.Tefas**,**A.Nikolaidis**,**N.Nikolaidis**,**V.Solachidis**,**S.Tsekeridou**and**I.Pitas**,**"Markov Chaotic Sequences for Correlation based Watermarking schemes"**,*Proc. of Int. Conf. on Nonlinear Dynamics(NLD'01)*, 27-30 August, 2001 (Also available online).**S.Tsekeridou**,**S.Krinidis**and**I.Pitas**,**"Scene Change Detection based on Audio-Visual Analysis and Interaction"**,*Proc. of 2000 Multi-Image Search and Analysis Workshop*, pp. 214-225, 12-17 March, 2001.**S.Tsekeridou**,**V.Solachidis**,**N.Nikolaidis**,**A.Nikolaidis**,**A.Tefas**and**I.Pitas**,**"Bernoulli Shift Generated Chaotic Watermarks: Theoretic Investigation"**,*Proc. of IEEE Int. Conf. on Acoustics, Speech and Signal Processing (ICASSP2001)*, vol.3, 7-11 May, 2001.**S.Tsekeridou**,**V.Solachidis**,**N.Nikolaidis**,**A.Nikolaidis**,**A.Tefas**and**I.Pitas**,**"Theoretic Performance Analysis of a Watermarking System based on Bernoulli Chaotic Sequences"**,*Proc. of Communications and Multimedia Security Conf. (CMS 2001)*, 21-22 May, 2001.**S.Tsekeridou**,**V.Solachidis**,**N.Nikolaidis**,**A.Nikolaidis**,**A.Tefas**and**I.Pitas**,**"Theoretic Investigation of the Use of Watermark Signals derived from Bernoulli Chaotic Sequences"**,*Proc. of the 12th Scandinavian Conf. on Image Analysis 2001 (SCIA2001)*, 11-14 June, 2001.**S.Tsekeridou**,**C.Kotropoulos**,**A.Xafopoulos**and**I.Pitas**,**"Comparative study of speaker verification techniques based on vector quantization, sphericity models and dynamic time warping"**,*Proc. of European Conf. on Circuit Theory and Design*, vol. II, pp. 13-16, August, 2001.

**Γ.Παππά**,**Β.Δούρου**,**Π.Βακαλούδη**,**Ν.Νικολαϊδης**,**Κ.Λυρούδια**and**Ι.Πήτας**,**"Τρισδιάστατη αναπαράσταση όγκου και επιφάνειας"**,*20ο Πανελλήνιο Oδοντιατρικό Συνέδριο*, 2000.**I.Djurovic**,**S.Stankovic**,**I.Pitas**,**L.Stankovic**and**J.Tilp**,**"Generalization of the Fourier domain watermarking to the space/spatial-frequency domain"**,*Proc. of 1st Int. Workshop on Image Analusis (IWISPA 2000)*, pp. 47 -51, 2000.**G.Karagianopoulou**,**B.Tsakaloudi**,**A.Karydas**,**A.Parathyra**,**L.Kechagias**and**I.Feidaros**,**"Τρισδιάστατη αναπαράσταση Μελανώματος του Δέρμ"**,*Proc. of XVIII Medical Conf. of Armed Forces*, 8-11 November, 2000 (article in Greek).**G.Karagianopoulou**,**A.Parathyra**,**A.Karydas**,**B.Tsakaloudi**,**O.Tsatos**and**I.Pitas**,**"Τρισδιάστατη αναπαράσταση των Νησιδίων Langerhans σε υλι"**,*Proc. of XXII National Conf. of Surgery*, 18-22 November, 2000 (article in Greek).**G.Karagianopoulou**,**B.Tsakaloudi**,**A.Karydas**,**A.Parathyra**,**A.Vogatzi**and**I.Pitas**,**"Ιστική Τρισδιάστατη Αναπαράσταση Μελανώματος Δ"**,*Proc. of XXII National Conf. of Surgery*, 18-22 November, 2000 (article in Greek).**C.Kotropoulos**and**I.Pitas**,**"On the theoretical properties of L_p mean comparators"**,*Proc. of EURASIP European Signal Processing Conf. (EUSIPCO 2000)*, pp. 2405-2408, 4-8 September, 2000.**S.Krinidis**,**N.Nikolaidis**and**I.Pitas**,**"Shape Based Alignment of 3-D Volume Slices"**,*Proc. of Int. Conf. on Electronics, Circuits and Systems (ICECS'00)*, vol. 1, pp. 438-441, 17-20 December, 2000.**J.Matas, M.Hamouz, K.Jonsson, J.Kittler, Y.Li**,**C.Kotropoulos**,**A.Tefas**,**I.Pitas**,**T.Tan, H.Yan, F.Smeraldi, J.Bigun, N.Capdevielle, W.Gerstner, S.Ben-Yacoub, Y.Abdelaoued**and**E.Mayoraz**,**"Comparison of face verification results on the XM2VTS database"**,*Proc. of 2000 Int. Conf. on Pattern Recognition*, vol. 4, pp. 858-863, 2000.**A.Nedzved**,**S.Ablameyko**and**I.Pitas**,**"Morphological segmentation of history cell images"**,*Proc. of Int. Conf. on Pattern Recognition (ICPR'00)*, vol. 1, pp. 500-503, 3-8 September, 2000.**N.Nikolaidis**,**S.Tsekeridou**,**A.Nikolaidis**,**A.Tefas**,**V.Solachidis**and**I.Pitas**,**"Applications of chaotic signal processing techniques to multimedia watermarking"**,*Proc. of the IEEE Workshop on Nonlinear Dynamics in Electronic Systems*, pp. 1-7, 18-20 May, 2000.**A.Nikolaidis**and**I.Pitas**,**"Comparison of different chaotic maps with application to image watermarking"**,*Proc. of IEEE Int. Symposium on Circuits and Systems (ISCAS 2000)*, vol. 5, 28-31 May, 2000.**A.Nikolaidis**and**I.Pitas**,**"A region-based technique for chaotic image watermarking"**,*Proc. of EURASIP European Signal Processing Conf. (EUSIPCO 2000)*, vol. 3, pp. 1681-1684, 4-8 September, 2000.**V.Solachidis**,**N.Nikolaidis**and**I.Pitas**,**"Watermarking Polygonal Lines Using Fourier Descriptors"**,*Proc. of IEEE Int. Conf. on Acoustics, Speech and Signal Processing (ICASSP'2000)*, vol. 4, 5-9 June, 2000.**V.Solachidis**and**I.Pitas**,**"Self-similar ring shaped watermark embedding in 2-D DFT domain"**,*CD-ROM Proc. of 2000 European Signal Processing Conf. (EUSIPCO'00)*, 5-8 September, 2000.**V.Solachidis**,**N.Nikolaidis**and**I.Pitas**,**"Fourier descriptors watermarking of vector graphic images"**,*CD-ROM Proc. of 2000 IEEE Int. Conf. on Image Processing (ICIP'00)*, vol. 3, pp. 9-12, 10-13 September, 2000.**A.Tefas**and**I.Pitas**,**"Image Authentication based on Chaotic Mixing"**,*Proc. of IEEE Int. Symposium on Circuits and Systems (ISCAS'2000)*, 28-31 May, 2000.**A.Tefas**,**C.Kotropoulos**and**I.Pitas**,**"Face authentication by using elastic graph matching and Support Vector Machines"**,*Proc. 2000 IEEE Int. Conf. Acoustics, Speech, and Signal Processing*, vol. IV, pp. 2409-2412, 5-9 June, 2000.**A.Tefas**and**I.Pitas**,**"Image Authentication and Tamper Proofing using Mathematical Morphology"**,*CD-ROM Proc. of European Signal Processing Conf. (EUSIPCO'2000)*, 5-8 September, 2000.**A.Tefas**,**C.Kotropoulos**and**I.Pitas**,**"Using Support Vector Machines for Face authentication based on elastic graph matching"**,*CD-ROM Proc. of IEEE Int. Conf. on Image Processing (ICIP'2000)*, vol. 1, pp. 29-32, 10-13 September, 2000.**A.Tefas**and**I.Pitas**,**"Multi-bit Image Watermarking Robust to Geometric Distortions"**,*CD-ROM Proc. of IEEE Int. Conf. on Image Processing (ICIP'2000)*, vol. 3, pp. 710 -713, 10-13 September, 2000.**S.Tsekeridou**and**I.Pitas**,**"Wavelet-based Self-Similar Watermarking for Still Images"**,*Proc. of 2000 IEEE Int. Symposium on Circuits and Systems (ISCAS'00)*, vol. 1, 28-31 May, 2000.**S.Tsekeridou**and**I.Pitas**,**"Embedding Self-Similar Watermarks in the Wavelet Domain"**,*Proc. of 2000 IEEE Int. Conf. on Acoustics, Systems and Signal Processing (ICASSP'00)*, vol. 4, 5-9 June, 2000.**S.Tsekeridou**,**F.AlayaCheikh**,**M.Gabbouj**and**I.Pitas**,**"Motion Field Estimation by Combined Vector Rational and Bilinear Interpolation for MPEG-2 Error Concealment"**,*Proc. of 2000 European Signal Processing Conf. (EUSIPCO'00)*, 5-8 September, 2000.**S.Tsekeridou**,**N.Nikolaidis**,**N.Sidiropoulos**and**I.Pitas**,**"Copyright Protection of Still Images Using Self-Similar Chaotic Watermarks"**,*Proc. of 2000 IEEE Int. Conf. on Image Processing (ICIP'00)*, vol. 1, pp. 411-414, 10-13 September, 2000.

**S.Tsekeridou**and**I.Pitas**,**"Audio-Visual Content Analysis for Content-based Video Indexing"**,*Proc. of IEEE Int. Conf. on Multimedia Computing and Systems (ICMCS'99)*, vol. 1, 7-11 June, 1999.**S.Tsekeridou**,**F.AlayaCheikh**,**M.Gabbouj**and**I.Pitas**,**"Application of Vector Rational Interpolation to Erroneous Motion Field Estimation for Error Concealment"**,*Proc. of IEEE-EURASIP Wor. on Nonlinear Signal and Image Processing (NSIP'99)*, 20-23 June, 1999.**V.Chatzis**and**I.Pitas**,**"Shape-Based Interpolation of Binary 3-D Images using Morphological Skeletonization"**,*Proc. of IEEE Int. Conf. on Multimedia Computing and Systems (ICMCS'99)*, vol. 2, 7-11 June, 1999.**C.Kotropoulos**and**I.Pitas**,**"Intelligence in modern communication systems"**,*Proc. of Int. COST 254 Workshop on Intelligenct Communication Technologies and Applications, with Emphasis on Mobile Communications*, pp. 1-12, May, 1999.**C.Kotropoulos**,**A.Tefas**and**I.Pitas**,**"Morphological elastic graph matching applied to frontal face authentication under optimal and real conditions"**,*Proc. of IEEE Int. Conf. on Multimedia Computing and Systems (ICMCS'99)*, pp. 934-938, 7-11 June, 1999.**C.Kotropoulos**,**A.Tefas**,**I.Pitas**,**C.Fernandez**and**F.Fernandez**,**"Performance assessment of morphological dynamic link architecture under optimal and real operating conditions"**,*Proc. of IEEE-EURASIP Workshop on Nonlinear Signal and Image Processing (NSIP'99)*, pp.355-359, 20-23 June, 1999.**N.Nikolaidis**and**I.Pitas**,**"Digital Image Watermarking: an Overview"**,*Proc. of Int. Conf. on Multimedia Computing and Systems (ICMCS'99)*, vol. 1, 7-11 June, 1999.**A.Nikolaidis**and**I.Pitas**,**"A Robust Feature-based Technique for Watermarking Frontal Face Images"**,*Proc. of IEEE-EURASIP Workshop on Nonlinear Signal and Image Processing (NSIP'99)*, vol. 1, pp. 341-345, 20-23 June, 1999.**G.Richard, Y.Menguy, I.Guis, N.Suaudeau, J.Boudy, P.Lockwood, C.Fernandez, F.Fernandez**,**C.Kotropoulos**,**A.Tefas**,**I.Pitas**,**R.Heimgartner, P.Ryser, C.Beumier, S.Pigeon, G.Matas, J.Kittler, J.Bigun, Y.Abdeljaoued, E.Meurville, L.Besacier, G.Maitre, J.Luettin, S.Ben-Yacoub**and**B.Ruiz**,**"Multi Modal Verification for Teleservices and Security Applications(M2VTS)"**,*Proc. of IEEE Int. Conf. on Multimedia Computing and Systems 1999 (ICMCS'99)*, pp. 1061-1063, 7-11 June, 1999.**V.Solachidis**and**I.Pitas**,**"Circularly symmetric watermark embedding in 2-D DFT domain"**,*Proc. of IEEE Int. Conf. on Acoustics, Speech and Signal Processing (ICASSP'99)*, vol. 6, pp. 3469-3472, 15-19 March, 1999.**A.Tefas**,**Y.Menguy**,**C.Kotropoulos**,**G.Richard**,**I.Pitas**and**P.Lockwood**,**"Compensating for variable recording conditions in frontal face authentication algorithms"**,*Proc. of IEEE Int. Conf. on Acoustics, Speech and Signal Processing (ICASSP'99)*, vol. 6, pp. 3561-3564, 15-19 March, 1999.**A.Tefas**,**C.Kotropoulos**and**I.Pitas**,**"Enhancing the performance of elastic graph matching for frontal face authentication by using support vector machines"**,*Proc. of Int. Workshop on support vector machine theory and applications (ACCAI '99)*, 5-16 July, 1999.**S.Tsekeridou**,**F.AlayaCheikh**,**M.Gabbouj**and**I.Pitas**,**"Motion Field Estimation by Vector Rational Interpolation for Error Concealment Purposes"**,*Proc. of IEEE Int. Conf. on Acoustics,Speech and Signal Processing (ICASSP'99)*, vol. 6, pp. 3397-4300, 15-19 March, 1999.

**P.Bassia**and**I.Pitas**,**"Robust Audio Watermarking in the Time Domain"**,*Proc. of IX European Signal Processing Conf. (EUSIPCO'98)*, vol. 1, pp. 25-28, 8-11 September, 1998.**A.Bors**and**I.Pitas**,**"Object segmentation and modeling in volumetric images"**,*Proc. of 1998 NOBLESSE Workshop on Non-Linear Model Based Image Analysis (NMBIA'98)*, pp. 295-300, 1-3 July, 1998.**A.Bors**and**I.Pitas**,**"Object segmentation in 3-D images based on alpha-trimmed mean radial basis function network"**,*Proc. of IX European Signal Processing Conf. (EUSIPCO'98)*, vol. 2, pp. 1093-1096, 8-11 September, 1998.**A.Bors**and**I.Pitas**,**"Motion and Segmentation Prediction in Image Sequences Based on Moving Object Tracking"**,*Proc. of IEEE Int. Conf. on Image Processing (ICIP'98)*, vol. 3, pp. 663-667, 4-7 October, 1998.**V.Chatzis**,**A.Bors**and**I.Pitas**,**"Decision Level Fusion by Clustering algorithms for Person Authentication"**,*Proc. of IX European Signal Processing Conf. (EUSIPCO'98)*, vol. 3, pp. 1309-1312, 8-11 September, 1998.**C.Cotsaces**and**I.Pitas**,**"Computing the Watersheds of Large Three-Dimensional Images Using Limited Random Access Memory"**,*International Symposium on Mathematical Morphology (ISMM 1998)*, 3-5 June, 1998.**B.Dourou**,**K.Lyroudia**,**I.Batsiolas**and**I.Pitas**,**"Computerised 3D reconstruction of seven mandibular incisors"**,*Proc. of 3rd Congress of the Balkan Stomatological Society*, 2-5 April, 1998.**B.Dourou**,**A.Digka**,**G.Mikrogeorgis**,**G.Pappa**,**K.Lyroudia**and**I.Pitas**,**"Μελέτη της μορφολογίας επτά κυνοδόντων της κάτω &#"**,*Proc. of 18th Panhellenic Congress*, 24-27 October, 1998.**B.Dourou**,**K.Lyroudia**,**G.Pappa**,**Ch.Chatzikallinikidis**,**O.Pantelidou**,**Th.Lambrianidis**and**I.Pitas**,**"Μελέτη της μορφολογίας τριών περιπτώσεων δοντιa"**,*Proc. of 1th Panhellenic Endodental Congress*, 27-28 November, 1998.**I.Giakoumis**and**I.Pitas**,**"Digital Restoration of Painting Cracks"**,*Proc. of IEEE Int. Symposium on Circuits and Systems (ISCAS'98)*, vol. 4, pp. 269-272, 31 May-3 June, 1998.**C.A.Kapoutsis**,**C.P.Vavoulidis**and**I.Pitas**,**"Morphological Techniques in the Iterative Closest Point Algorithm"**,*Proc. of IEEE Int. Conf. on Image Processing (ICIP'98)*, vol. 1, pp. 808-812, 4-7 October, 1998.**C.Kotropoulos**,**A.Tefas**and**I.Pitas**,**"Face Authentication using Variants of Elastic Graph Matching based on Mathematical Morphology that incorporate Local Discriminant Coefficients"**,*Proc. of IEEE Int. Conf. on Acoustics, Speech and Signal Processing (ICASSP'98)*, pp. 3729-3732, 12-15 May, 1998.**C.Kotropoulos**,**S.Tsekeridou**,**M.Gabrani**and**I.Pitas**,**"Adaptive LMS Order Statistic Filters with Variable Step-sizes"**,*Proc. of IEEE Int. Conf. on Telecommunications (ICT'98)*, vol. 1, pp. 465-469, 22-25 June, 1998.**C.Kotropoulos**and**I.Pitas**,**"Linear Projection Algorithms and Morphological Dynamic Link Architecture for Frontal Face Authentication"**,*Proc. of European Signal Processing Conf. (EUSIPCO'98)*, vol. 1, pp. 299-302, 8-11 September, 1998.**C.Kotropoulos**,**A.Tefas**and**I.Pitas**,**"Frontal Face Authentication using Variants of Dynamic Link Matching based on Mathematical Morphology"**,*Proc. of IEEE Int. Conf. on Image Processing (ICIP'98)*, vol. 1, pp. 122-126, 4-7 October, 1998.**A.Nikolaidis**and**I.Pitas**,**"Facial Feature Extraction and Determination of Pose"**,*Proc. of 1998 NOBLESSE Workshop on Non-Linear Model Based Image Analysis (NMBIA'98)*, pp. 257-262, 1-3 July, 1998.**N.Nikopoulos**,**V.Chatzis**and**I.Pitas**,**"3D Binary Fast Morphological Shape Decomposition"**,*Proc. of 1998 NOBLESSE Workshop Non-Linear Model Based Image Analysis (NMBIA'98)*, 1-3 July, 1998.**M.Pappas**and**I.Pitas**,**"Old painting digital color restoration"**,*Proc. of 1998 NOBLESSE Workshop on Non-Linear Model Based Image Analysis (NMBIA'98)*, pp. 36-41, 1-3 July, 1998.**G.Pappa**,**K.Lyroudia**,**I.Batsiolas**and**I.Pitas**,**"Computerised 3D reconstruction of seven maxillary incisors"**,*Proc. of 3rd Congress of the Balkan Stomatological Society*, 2-5 April, 1998.**B.Tatsi**,**Al.Tzobairis**,**G.Pappa**,**K.Lyroudia**and**I.Pitas**,**"Computerised 3D reconstruction of seven maxillary canines"**,*Proc. of 4th Student Congress*, April, 1998.**A.Tefas**,**C.Kotropoulos**and**I.Pitas**,**"Face Verification based on Morphological Shape Decomposition"**,*Proc. of IEEE Third Int. Conf. on Automatic Face and Gesture Recognition (FG'98)*, pp. 36-41, 14-16 April, 1998.**A.Tefas**,**C.Kotropoulos**and**I.Pitas**,**"Variants of Dynamic Link Architecture based on Mathematical Morphology for Frontal Face Authentication"**,*Proc. of IEEE Conf. on Computer Vision and Pattern Recognition (CVPR'98)*, vol. 1, pp. 814-819, 23-25 June, 1998.**S.Tsekeridou**,**C.Kotropoulos**and**I.Pitas**,**"Morphological Signal Adaptive Median Filter for Still Image and Image Sequence Filtering"**,*Proc. of IEEE Int. Symposium on Circuits and Systems (ISCAS'98)*, vol. 4, pp. 21-24, 31 May-3 June, 1998.**S.Tsekeridou**and**I.Pitas**,**"Speaker Identification for Audio Indexing Applications"**,*Proc. of IEEE Int. Conf. on Telecommunications (ICT'98)*, vol. 1, pp. 236-240, 22-25 June, 1998.**S.Tsekeridou**and**I.Pitas**,**"Facial Feature Extraction in Frontal Views using Biometric Analogies"**,*Proc. of IX European Signal Processing Conf. (EUSIPCO'98)*, vol. 1, pp. 315-318, 8-11 September, 1998.**S.Tsekeridou**and**I.Pitas**,**"Speaker Dependent Video Indexing based on Audio-Visual Interaction"**,*Proc. of IEEE Int. Conf. on Image Processing (ICIP'98)*, vol. 1, pp.358-362, 4-7 October, 1998.**S.Vlassis**,**S.Siskos**and**I.Pitas**,**"Analog Implementation of an Order Statistics Filter"**,*Proc. of 9th Mediterranian Electrotechnical Conf. (MELECON'98)*, pp. 649-653, 1998.**G.Voyatzis**,**N.Nikolaidis**and**I.Pitas**,**"Digital Watermarking: An Overview"**,*Proc. of IX European Signal Processing Conf. (EUSIPCO'98)*, vol. 1, pp. 9-12, 8-11 September, 1998.**G.Voyatzis**and**I.Pitas**,**"Chaotic Watermarks for Embedding in the Spatial Digital Image Domain"**,*Proc. of IEEE Int. Conf. on Image Processing (ICIP'98)*, vol. 2, pp. 432-436, 4-7 October, 1998.**G.Voyatzis**,**N.Nikolaidis**and**I.Pitas**,**"Copyright Protection of Multimedia Documents:From Theory to Application"**,1998.**G.Voyatzis**,**G.Angelopoulos**,**A.Bors**and**I.Pitas**,**"A system for capturing high resolution images"**,*Proc. of Conf. on Technology and Automatics*, pp. 238-242, 1998.**Ch.Chatzikallinikidis**,**K.Lyroudia**and**I.Pitas**,**"Εσωτερική ανατομία των άνω γομφίων. Είναι απλή ή π"**,*Proc. of 18th Panhellenic Congress*, 24-27 October, 1998.**Χ.Χατζηκαλλινικίδης**,**Κ.Λυρούδια**and**Ι.Πήτας**,**"Εσωτερική ανατομία των άνω γομφίων. Είναι απλή ή π"**,*18ο Πανελλήνιο Οδοντιατρικό Συνέδριο*, 24-27 Οκτωβρί&#, 1998.

**A.Kadoglou**and**I.Pitas**,**"An Access Control System for Multimedia Applications"**,*Proc. of 6th Greek Conf. on Informatics*, 4-6 December, 1997.**E.Kofidis**,**S.Theodoridis**,**C.Kotropoulos**and**I.Pitas**,**"Applications of Neural Networks and Order Statistic Filters to Speckle Noise Reduction in Remote Sensing Imaging"**,*Neurocomputation in Remote Sensing Data Analysis: Proceedings of Concerted Actions (COMPARES) (I. Kanellopoulos, G. G. Wilikinson, F. Roli, and J. Austin, Eds.)*, 1997.**C.Kotropoulos**,**I.Pitas**,**S.Fischer**and**B.Duc**,**"Face authentication using Morphological Dynamic Link Architecture"**,*Lecture Notes on Computer Science: Proceedings of the First Conf. Audio- and Video- based Biometric Person Authentication (J. Bigun, G. Chollet and G. Borgefors, Eds.)*, vol. 1206, pp. 169-176, 12-14 March, 1997.**C.Kotropoulos**and**I.Pitas**,**"Rule-based face detection in frontal views"**,*Proc. of 1997 IEEE Int. Conf. on Acoustics, Speech and Signal Processing (ICASSP'97)*, vol. 4, pp. 2537-2540, 20-24 April, 1997.**C.Kotropoulos**,**M.Gabrani**and**I.Pitas**,**"Constrained Adaptive Multichannel {L}-filters"**,*Proc. of 13th Int. Conf. on Digital Signal Processing (DSP'97)*, pp. 279-283, 2-4 July, 1997.**C.Kotropoulos**,**A.Tefas**and**I.Pitas**,**"Face Authentication based on Morphological Shape Decomposition"**,*Proc. of IEE Conf. on Image Processing and its Applications (IPA'97)*, pp. 794-798, July, 1997.**C.Kotropoulos**and**I.Pitas**,**"Face Verification based on Morphological Dynamic Link Architecture"**,*CD-ROM Proc. of IEEE Workshop on Nonlinear Signal and Image Processing (NSIP'97)*, 8-10 September, 1997.**C.Kotropoulos**,**M.Gabrani**and**I.Pitas**,**"Adaptive Multichannel {L}-filters with Structural Constraints"**,*CD-ROM Proc. of 1997 IEEE Workshop on Nonlinear Signal and Image Processing (NSIP'97)*, 7-11 September, 1997.**C.Kotropoulos**and**I.Pitas**,**"Face Authentication based on Morphological Grid Matching"**,*Proc. of 1997 IEEE Conf. on Image Processing (ICIP'97)*, vol. 1, pp. 105-108, 26-29 October, 1997.**K.Lyroudia**,**G.Mikrogeorgis**,**N.Nikopoulos**,**I.Pitas**,**G.Samakovitis**and**M.Karanika**,**"3D Computer-aided Reconstruction of the Morphology of Teeth with Malformations"**,*Proc. of Medical Informatics Europe - 14th Int. Congress (MIE'97)*, pp. 482-486, 24-29 May, 1997.**K.Lyroudia**,**O.Pantelidou**,**G.Mikrogeorgis**,**N.Nikopoulos**and**I.Pitas**,**"Evaluation of the Apical Microleakage of Two Root Canal Sealers by using 3-D Reconstruction"**,*Proc. of 8th Congress of the European Society of Endodontology*, pp. 16, p39, 12-14 June, 1997.**K.Lyroudia**,**O.Pantelidou**,**G.Mikrogeorgis**,**N.Nikopoulos**,**I.Pitas**and**I.Arxontaki**,**"Εκτίμηση της μυλικής μικροδιείσδυσης σε ενδοδο_"**,*Proc. of 17th Panhellenic Congress*, 29 October-1 November, 1997.**G.Mikrogeorgis**,**K.Lyroudia**,**N.Nikopoulos**,**I.Pitas**and**I.Molyvdas**,**"3D Computer-aided Reconstruction of Six Teeth with Morphological Abnormalities"**,*Proc. of 8th Congress of the European Society of Endodontology*, pp. 27, p63, 12-14 June, 1997.**A.Nikolaidis**,**C.Kotropoulos**and**I.Pitas**,**"Facial feature extraction using Adaptive Hough Transform, template matching and active contour models"**,*Proc. of 13th Int. Conf. on Digital Signal Processing (DSP'97)*, pp. 865-868, 2-4 July, 1997.**N.Nikopoulos**and**I.Pitas**,**"An Efficient Algorithm for 3D Binary Morphological Transformations with 3D Structuring Elements of Arbitrary Size and Shape"**,*CD-ROM Proc. of 1997 IEEE Workshop on Nonlinear Signal and Image Processing (NSIP'97)*, 7-11 September, 1997.**M.Pappas**and**I.Pitas**,**"Digital Color Restoration of Old Paintings"**,*CD-ROMProc. of 1997 IEEE Workshop on Nonlinear Signal and Image Processing (NSIP'97)*, 7-11 September, 1997.**I.Pitas**,**C.Kotropoulos**,**N.Nikolaidis**and**A.Bors**,**"Robust and Adaptive Techniques in Self-Organising Neural Networks"**,*Nonlinear Analysis, Theory, Methods & Applications: Proc. of the Second World Congress of Nonlinear Analysts*, pp. 4517-4528, 1997.**W.Puech**,**A.Bors**,**J.-M.Chassery**and**I.Pitas**,**"Mosaique de Peintures sur cylindres generalises uniformes a axe droit"**,*Proc. of 16th Colloque GRETSI*, September, 1997.**W.Puech**,**J.-M.Chassery**and**I.Pitas**,**"Curved Surface Reconstruction Based on Parallels"**,*Proc. of 3rd Int. Conf. on Curves and Surfaces,Chamonix*, pp. 481, 1997.**L.Senhadji**,**N.Nikolaidis**and**J.Ojaniemi**,**"Application of two non-linear methods for the localization of artifacts on trend data"**,*Proc. of 19th Annual Int. Conf. of the IEEE Engineering in Medicine and Biology Society*, pp. 1409 -1412, 1997.**K.Sobottka**and**I.Pitas**,**"A Fully Automatic Approach to Facial Feature Detection and Tracking"**,*Proc. of 1st Int. Conf. on Audio- and Video-based Biometric Person Authentication (AVBPA'97)*, pp. 77-84, 12-14 March, 1997.**S.Tsekeridou**,**I.Pitas**and**C.LeBuhan**,**"An Error Concealment Scheme for MPEG-2 coded video sequences"**,*Proc. of 1997 IEEE Int. Symposium on Circuits and Systems (ISCAS'97), Hong Kong*, vol.2, 9-12 June, 1997.**S.Tsekeridou**and**I.Pitas**,**"Error Concealment Techniques in MPEG-2"**,*CD-ROM Proc. of 1997 IEEE Workshop on Nonlinear Signal and Image Processing (NSIP'97)*, 7-11 September, 1997.**C.P.Vavoulidis**and**I.Pitas**,**"Morphological Iterative Closest Point Algorithm"**,*Proc. of 7th Int. Conf. on Computer Analysis of Images and Patterns (CAIP'97)*, 10-12 September, 1997.**G.Voyatzis**and**I.Pitas**,**"Embedding Robust Watermarks by Chaotic Mixing"**,*Proc. of 13th Int. Conf. on Digital Signal Processing (DSP'97)*, vol. 1, 2-4 July, 1997.**A.Bors**,**W.Puech**,**I.Pitas**and**J.-M.Chassery**,**"Perspective Distortion Analysis for Mosaicing Images painted on Cylindrical Surfaces"**,*Proc. of 1997 IEEE Int. Conf. on Acoustics, Speech and Signal Processing (ICASSP'97)*, pp. 3049-3052, 20-24 April, 1997.**A.Bors**and**I.Pitas**,**"Moving Scene Segmentation using Median Radial Basis Function Network"**,*Proc. of 1997 IEEE Int. Symposium on Circuits and Systems (ISCAS'97)*, vol. 1, 9-12 June, 1997.**A.Bors**and**I.Pitas**,**"Alpha-trimmed Mean Radial Basis Functions and their Application in Object Modeling"**,*CD-ROM Proc. of 1997 IEEE Workshop on Nonlinear Signal and Image Processing (NSIP'97)*, 7-11 September, 1997.**A.Bors**,**W.Puech**,**I.Pitas**and**J.-M.Chassery**,**"Mosaicing of Flattened Images From Straight Homogeneous Generalized Cylinders"**,*Proc. of 7th Int. Conf. on Computer Analysis of Images and Patterns (CAIP'97)*, pp. 122-129, 10-12 September, 1997.**V.Chatzis**and**I.Pitas**,**"Randomized Fuzzy Cell Hough Transform"**,*Proc. of the 6th IEEE Int. Conf. on Fuzzy Systems (FUZZ-IEEE'97)*, vol. 2, 1-5 July, 1997.**V.Chatzis**and**I.Pitas**,**"Fuzzy Vector Median Definition based on a Fuzzy Vector Distance"**,*CD-ROM Proc. of 1997 IEEE Workshop on Nonlinear Signal and Image Processing (NSIP'97)*, 7-11 September, 1997.**C.Cotsaces**,**G.Mikrogeorgis**,**K.Lyroudia**and**I.Pitas**,**"Digital Registration of Dental Radiographs for Monitoring Teeth Treatment"**,*Proc. of 8th Congress of the European Society of Endodontology*, pp. 39, pp. 90, 12-14 June, 1997.**C.Cotsaces**and**I.Pitas**,**"Memory Efficient Propagation-based Algorithms for Influence Zone Transmission"**,*Proc. of 1997 IEEE Workshop on Nonlinear Signal and Image Processing (NSIP'97)*, 7-11 September, 1997.

**M.Acheroy**,**C.Beumier**,**J.Biguen**,**G.Chollet, B.Duc, S.Fischer, D.Genoud**,**S.Fischer, P.Lockwood, G.Maitre, S.Pigeon**,**I.Pitas**,**K.Sobottka**and**L.Vandendorpe**,**"Multi-modal person verification tools using speech and images"**,*Proc. of the European Conf. on Multimedia Applications,Services and Techniques*, pp. 747-761, 28-30 May, 1996.**A.Bors**and**I.Pitas**,**"Moving Object recognition Based on Radial Basis Functions Networks"**,*Proc. of 9th Image and Multidimensional Signal Processing Workshop*, pp. 34-35, 3-6 March, 1996.**A.Bors**and**I.Pitas**,**"Embedding Parametric Digital Signatures in Images"**,*Proc. of EUSIPCO-96*, vol. 3, September, 1996.**A.Bors**and**I.Pitas**,**"Image Watermarking Using DCT Domain Constraints"**,*Proc. of 1996 IEEE Int. Conf. on Image Processing (ICIP'96)*, vol. 3, pp. 231-234, 16-19 September, 1996.**V.Chatzis**and**I.Pitas**,**"Introducing the Select and Split Fuzzy Cell Hough Transform"**,*Proc. of ICPR '96*, vol. 2, pp. B552-B556, 25-30 August, 1996.**V.Chatzis**and**I.Pitas**,**"Select and Split Fuzzy Cell Hough Transform-A fast and efficient method to detect contours in images"**,*Proc. of the Fifth IEEE Int. Conf. on Fuzzy Systems (FUZZ-IEEE'96)*, vol. 3, pp. 1892-1898, 8-11 September, 1996.**V.Chatzis**and**I.Pitas**,**"Fuzzy Cell Hough Transform"**,*Proc. of EUSIPCO-96*, vol. 3, September, 1996.**C.Dimou**and**I.Pitas**,**"Parameter Estimation of Non-Translational Motion Fields"**,*Proc. of EUSIPCO-96*, vol. 2, September, 1996.**V.Dourou**,**G.Mikrogeorgis**,**N.Nikopoulos**,**K.Lyroudia**and**I.Pitas**,**"3D Reconstruction of seven Upper Premolars"**,*Proc. of the 2nd Congress of European Dental Students*, 1-6 October, 1996.**C.Kotropoulos**,**I.Pitas**and**M.Gabrani**,**"Multichannel adaptive L-filters in color image processing"**,*Proc. of the IEEE Int. Conf. on Image Processing (ICIP '96)*, vol. 1, pp. 989-992, 16-19 September, 1996.**K.Lyroudia**,**G.Mikrogeorgis**,**N.Nikopoulos**,**G.Samakovitis**,**I.Molyvdas**and**I.Pitas**,**"3D Reconstruction of two Double Teeth"**,*Proc. of 1st Balkan Dental Congress*, pp. 164, March, 1996.**K.Lyroudia**,**G.Mikrogeorgis**,**N.Nikopoulos**,**G.Samakovitis**,**I.Pitas**and**I.Molyvdas**,**"Computerised 3D Reconstruction of two Double Teeth"**,*Proc. of the Int. Conf. on Confocal and Near-field Microscopy, joined with three-dimensional Image Processing in Microscopy*, 14-17 April, 1996.**K.Lyroudia**,**G.Mikrogeorgis**,**N.Nikopoulos**,**M.Karanika**and**I.Pitas**,**"3D Reconstruction of the Morphology of two Odontomas"**,*Proc. of the 16th Greek Dental Congress*, pp. 101, 24-27 October, 1996.**K.Lyroudia**,**G.Samakovitis**,**I.Molyvdas**,**Th.Lambrianidis**,**G.Mikrogeorgis**and**I.Pitas**,**"Κινούμενη τρισδιάστατη αναπαράσταση της μορφολ"**,*Proc. of 1st Balkan Dental Congress and 15th Panhellenic Dental Conf.*, 28-31 March, 1996.**K.Lyroudia**,**G.Mikrogeorgis**,**N.Nikopoulos**,**M.Karanika**and**I.Pitas**,**"Τρισδιάστατη αναπαράσταση της μορφολογίας δύο `"**,*Proc. of 16th Panhellenic Dental Congress*, 24-27 October, 1996.**N.Nikolaidis**and**I.Pitas**,**"Copyright protection of images using robust digital signatures"**,*Proc. of IEEE Int. Conf. on Acoustics, Speech and Signal Processing (ICASSP-96)*, pp. 2168-2171, May, 1996.**N.Nikolaidis**and**I.Pitas**,**"Adaptive Multichannel L Filters Based on Reduced Ordering"**,*Proc. of EUSIPCO-96*, vol. 1, September, 1996.**N.Nikopoulos**,**C.Dimou**,**V.Chatzis**and**I.Pitas**,**"Simulation of an Access Control System for Image-Related Services"**,*Proc. of 1996 Int. Conf. on Electronics, Circuits and Systems (ICECS'96)*, vol. 1, pp. 354-357, 13-16 October, 1996.**M.Pappas**and**I.Pitas**,**"Soft Morphological Operators Based on Nonlinear Lp Mean Operators"**,*Proc. of the 1996 Int. Symposium on Mathematical Morphology (ISMM'96)*, pp. 187-193, May, 1996.**M.Pappas**and**I.Pitas**,**"Sorting Networks Using Nonlinear Lp Mean Comparators"**,*Proc. of1996 Int. Symposium on Circuits and Systems (ISCAS'96)*, vol. 2, May, 1996.**I.Pitas**,**"A Method for Signature Casting on Digital Images"**,*1996 IEEE Int. Conf. on Image Processing (ICIP'96)*, vol. 3, pp. 215-218, 16-19 September, 1996.**W.Puech**,**A.Bors**,**J.-M.Chassery**and**I.Pitas**,**"Mosaicing of Paintings on Curved Surfaces"**,*Proc. of 3rd IEEE Workshop on Applications of Computer Vision (WACV'96)*, pp. 44-49, 2-4 December, 1996.**K.Sobottka**and**I.Pitas**,**"Localization of Facial Regions and Features in Color Images"**,*Proc. of 4th Open Russian-German Workshop: Pattern Recognition and Image Analysis*, pp. 134-138, 3-9 March, 1996.**K.Sobottka**and**I.Pitas**,**"Extraction of Facial Regions and Features using Color and Shape Information"**,*Proc. of Int. Conf. on Pattern Recognition (ICPR'96)*, vol. 3, pp. C421-C425, 25-29 August, 1996.**K.Sobottka**and**I.Pitas**,**"Face Localization and Facial Feature Extraction Based on Shape and Color Information"**,*Proc. of 1996 IEEE Int. Conf. on Image Processing (ICIP'96)*, vol. 3, pp. 483-486, 16-19 September, 1996.**K.Sobottka**and**I.Pitas**,**"Segmentation and Tracking of Faces in Color Images"**,*Proc. of 2nd Int. Conf. on Automatic Face and Gesture Recognition 1996*, pp. 236-241, 14-16 October, 1996.**S.Tsekeridou**,**C.Kotropoulos**and**I.Pitas**,**"Morphological Signal Adaptive Median Filter for Noise Removal"**,*Proc. of 1996 Int. Conf. on Electronics, Circuits and Systems (ICECS'96)*, vol. 1, pp. 191-194, 13-16 October, 1996.**G.Voyatzis**and**I.Pitas**,**"Chaotic Mixing of Digital Images and Applications to Watermarking"**,*Proc. of European Conf. on Multimedia Applications,services and Techniques (ECMAST'96)*, vol. 2, May, 1996.**G.Voyatzis**and**I.Pitas**,**"Applications of Toral Automorphisms in Image Watermarking"**,*Proc. of 1996 IEEE Int. Conf. on Image Processing (ICIP'96)*, vol. 2, pp. 237-240, 16-19 September, 1996.**K.Lyroudia**,**G.Mikrogeorgis**,**N.Nikopoulos**,**G.Samakovitis**,**I.Molyvdas**and**I.Pitas**,**"Computerized 3D reconstruction of two double teeth."**,*1ο Βαλκανικό Οδοντιατρικό Συνέδριο*, 28-31 Μαρτίου, 1996.**Κ.Λυρούδια**,**Γ.Μικρογεώργης**,**Ν.Νικόπουλος**,**Μ.Καρανίκα**and**Ι.Πήτας**,**"Τρισδιάστατη αναπαράσταση της μορφολογίας δυο `"**,*16o Πανελλήνιο Οδοντιατρικό Συνέδριο*, 24-27/10, 1996.**K.Lyroudia**,**G.Mikrogeorgis**,**N.Nikopoulos**,**G.Samakovitis**,**I.Molyvdas**and**I.Pitas**,**"Computerized 3D reconstruction of two double teeth"**,*3-Dimensional Imaging Sciences in Microscopy*, 1996.**Κ.Λυρούδια**,**Γ.Σαμακοβίτης**,**Θ.Λαμπριανίδης**,**Ι.Μολυβδάς**,**Γ.Μικρογεώργης**and**Ι.Πήτας**,**"Κινούμενη τρισδιάστατη αναπαράσταση της μορφολ"**,*1ο Βαλκανικό Οδοντιατρικό Συνέδριο*, 28-31 Μαρτίου, 1996.

**G.Angelopoulos**and**I.Pitas**,**"Parallel Digital Signal Filtering on Barrel Shifter Computers"**,*Proc. of the ISCAS95 Conf.*, pp. 1368-1371, April, 1995.**G.Angelopoulos**and**I.Pitas**,**"Parallel Digital Signal Processing Algorithms on Barrel Shifter Computers"**,*Proc. of IEEE Workshop on Nonlinear Signal and Image Processing*, pp. 883-886, June, 1995.**A.Bors**and**I.Pitas**,**"Median Radial Basis Functions Network for Motion Field Processing"**,*Proc. of IEEE Workshop on Nonlinear Signal and Image Processing*, pp. 702-705, June, 1995.**A.Bors**and**I.Pitas**,**"Segmentation and Estimation of the Optical Flow"**,*Proc. of Int. Conf. of Computer Analysis of Images and Patterns*, pp. 680-685, September, 1995.**V.Chatzis**and**I.Pitas**,**"Mean and Median of Fuzzy Numbers"**,*Proc. of IEEE Workshop on Nonlinear Signal and Image Processing*, pp. 297-300, June, 1995.**D.Coltuc**and**I.Pitas**,**"Fast Running Max/Min Filters"**,*Proc. of the IEEE Workshop on Nonlinear Signal and Image Processing*, pp. 871-874, June, 1995.**D.Coltuc**and**I.Pitas**,**"One-dimensional and two-dimensional Jordan Decomposition Filters"**,*Proc. of the IEEE Workshop on Nonlinear Signal and Image Processing*, pp. 979-982, June, 1995.**D.Coltuc**and**I.Pitas**,**"Morphological Signal Decomposition"**,*Proc. of the IEEE Workshop on Nonlinear Signal and Image Processing*, pp. 983-986, June, 1995.**D.Coltuc**and**I.Pitas**,**"Memory Mappings for Fast Peano Scan"**,*Proc. of ECCT 1995 European Conf. on Circuits Theory and Design*, pp. 817-821, August, 1995.**D.Coltuc**and**I.Pitas**,**"Low Level Image Processing by Jordan Decomposition Filters"**,*Proc. of ECCT 1995 European Conf. on Circuits Theory and Design*, pp. 1019-1023, August, 1995.**D.Coltuc**and**I.Pitas**,**"Jordan Decomposition Filters"**,*Proc. of the IEEE Int. Symposium on Circuits and Systems*, vol. 3, pp. 1896-1899, 1995.**C.Dimou**and**I.Pitas**,**"Block Matching Algorithms for motion estimation in Mesh Connected Computers"**,*Proc. of ECCTD 1995 European Conf. on Circuits Theory and Design*, pp. 331-335, August, 1995.**N.Nikolaidis**and**I.Pitas**,**"Optimal multichannel L-filters based on reduced ordering"**,*Proc. of the IEEE Workshop on Nonlinear Image and Signal Processing*, pp. 507-510, June, 1995.**N.Nikolaidis**and**I.Pitas**,**"Edge Detection Operators for Angular Data"**,*Proc. of the IEEE Int. Conf. on Image Processing (ICIP 95)*, pp. 157-160, October, 1995.**M.Pappas**and**I.Pitas**,**"Grayscale Morphology Using Nonlinear L_p Mean Filters"**,*Proc. of the 1995 IEEE Workshop on Nonlinear Signal and Image Processing (NSIP' 95)*, vol. 1, June, 1995.**M.Pappas**and**I.Pitas**,**"Binary Matrix Set Morphology"**,*Proc. of the 8th Int. Symposium on Theoretical Electrical Engineering (ISTET'95)*, pp. 203-206, 1995.**I.Pitas**and**T.H.Kaskalis**,**"Applying Signatures on Digital Images"**,*Proc. of IEEE Workshop on Nonlinear Image and Signal Processing*, pp. 460-463, June, 1995.**Κ.Λυρούδια**,**Γ.Σαμακοβίτης**,**Θ.Λαμπριανίδης**,**Ι.Μολυβδάς**,**Γ.Μικρογεώργης**and**Ι.Πήτας**,**"Κινούμενη τρισδιάστατη αναπαράσταση της μορφολ"**,*15ο Πανελλήνιο Οδοντιατρικό Συνέδριο*, 25-28 Οκτωβρί&#, 1995.

**G.Angelopoulos**and**I.Pitas**,**"A Fast Implementation of two-dimensional Weighted Median Filters"**,*Proc. of the ICPR94 Conf., Signal Processing*, pp. 140-142, October, 1994.**G.Angelopoulos**and**I.Pitas**,**"Two-dimensional Vector Median Filters on Mesh Connected Computers"**,*Proc. of the ICIP94 Conf.*, vol. 3, November, 1994.**A.Bors**and**I.Pitas**,**"Robust estimation for radial basis functions"**,*Proc. of IEEE Neural Networks for Signal Processings*, pp. 105-114, September, 1994.**A.Buchowicz**and**I.Pitas**,**"Multichannel distance filters"**,*Proc. of the IEEE Int. Conf. on Image Processing*, vol. 2, November, 1994.**A.Buchowicz**and**I.Pitas**,**"Application of multichannel distance filters to colour image processing"**,*Proc. of the XVII Polish National Conf. on Circuit Theory*, 1994.**D.Coltuc**and**I.Pitas**,**"Morphological signal decomposition in digital image compression"**,*Proc. of the Mathematical Morphology and its Applications, to Image Processing-Poster Constributions, editor J. Sella and P. Soille*, pp. 5-6, 1994.**M.Gabrani**,**C.Kotropoulos**and**I.Pitas**,**"Cellular adaptive LMS L-filters for noise suppression in still images and image sequences"**,*Proc. of the IEEE Int. Conf. on Image Processing (ICIP '94)*, pp. I-358-I-361, November, 1994.**E.Kofidis**,**S.Theodoridis**,**C.Kotropoulos**and**I.Pitas**,**"Segmentation-based L-filtering of speckle-noise in ultrasonic images"**,*Proc. of the SPIE Symposium on Electronic Imaging Science and Technology:Nonlinear Image Processing V*, vol. 2180, February, 1994.**C.Kotropoulos**and**I.Pitas**,**"Multichannel L-filter design based on marginal data ordering"**,*Proc. of the IEEE Int. Conf. on Acoustics,Speech and Signal Processing*, pp. III-93--III-96, April, 1994.**C.Kotropoulos**,**I.Pitas**and**M.Gabbouj**,**"Marginal median Learning Vector Quantizer"**,*Proc. of the European Signal Processing Conf. (EUSIPCO '94)*, pp. 1496-1499, August, 1994.**C.Kotropoulos**and**I.Pitas**,**"Adaptive LMS L-filters for smoothing noisy images"**,*Proc. of the Int. Conf. on Pattern Recognition (ICPR' 94)*, pp. 181-183, October, 1994.**N.Nikolaidis**and**I.Pitas**,**"Application of directional statistics in vector direction estimation"**,*Proc. of the IEEE Int. Conf. on Acoustics, Speech and Signal Processing*, vol. 5, April, 1994.**N.Nikolaidis**and**I.Pitas**,**"Optimal L-filters for vector magnitude filtering"**,*Proc. of European Signal Processing Conf. (Eusipco '94)*, pp. 955-959, 1994.**I.Pitas**,**C.Kotropoulos**,**N.Nikolaidis**,**R.Yang**and**M.Gabbouj**,**"A class of order statistics Learning Vector Quantizers"**,*Proc. of the IEEE Int. Symposium on Circuits and Systems (ISCAS 94)*, pp. 387-390, May, 1994.**I.Pitas**and**A.Karasaridis**,**"Discrete multichannel orthogonal transforms"**,*Proc. of the IEEE Int. Conf. on Acoustics, Speech,and Signal Processing (ICASSP 94)*, pp. 325-328, 1994.**R.Yang**,**M.Gabbouj**,**I.Pitas**and**C.Kotropoulos**,**"A class of Robust Learning Vector Quantizers"**,*Signal Processing VII: Theories and Applications*, pp. 564-567, August, 1994.**K.Lyroudia**,**N.Nikolaidis**,**C.Palakidis**and**I.Pitas**,**"Three-dimensional reconstuction of pulpal blood vessels and nerves"**,*Proc. of the Int. Conf. on Confocal and Near-field Microscopy, joined with three-dimensional Image Processing in Microscopy*, 25-28 April, 1994 (organized by the Society for 3-D Imaging Sciences in Microscopy).

**C.Kotropoulos**,**I.Pitas**and**A.Maglara**,**"Voronoi Tessellation and Delauney Triangulation using Euclidean Disk Growing in Z^2"**,*Proc. of the IEEE Int. Conf. on Acoustics, Speech and Signal Processing*, pp. 29-32, April, 1993.**C.Kotropoulos**and**I.Pitas**,**"Multichannel L-filters based on M-ordering"**,*Proc. of the IEEE Winter Workshop on Nonlinear Digital Signal Processing*, pp. 1.2-3.1--1.2-3.6, 1993.**C.Kotropoulos**and**I.Pitas**,**"Error-analysis of recursive algorithms for computing the correlation matrix of the order statistics"**,*Proc. of the IEEE Winter Workshop on Nonlinear Digital Signal Processing*, pp. 6.2-1.1-6.2-1.6, 1993.**C.Kotropoulos**,**I.Pitas**,**X.Magnisalis**and**M.G.Strintzis**,**"A variant of Learning Vector Quantizer based on the L_2 mean for segmentation of ultrasonic images"**,*Proc. of the IEEE Int. Symposium on Circuits and Systems*, pp. 679-682, 1993.**C.Kotropoulos**and**I.Pitas**,**"A variant of Learning Vector Quantizer based on split-merge statistical tests"**,*Proc. of Lecture Notes in Computer Science:Computer Analysis of Images and Patterns (D. Chetverikov and W. G. Kropatsch, eds.)*, pp. 822-829, 1993.**C.Kotropoulos**,**X.Magnisalis**,**I.Pitas**and**M.G.Strintzis**,**"Signal-adaptive maximum likelihood filtering of ultrasonic speckle"**,*Proc. of the European Conf. on Circuit Theory and Design (ECCTD '93)*, pp. 1635-1638, 1993.**C.Kotropoulos**and**I.Pitas**,**"Split-merge Learning Vector Quantizer algorithm"**,*Proc. of the European Conf. on Circuit Theory and Design (ECCTD '93)*, pp. 465-468, 1993.**S.Malasiotis**,**N.Nikolaidis**,**M.G.Strintzis**and**I.Pitas**,**"A smoothing algorithm with reliability constraints for image motion field coding"**,*Proc. of the Int. Congress on Communication and Control*, August, 1993.**N.Nikolaidis**,**I.Pitas**and**T.Kilindris**,**"Application of directional statistics to nonlinear vector field filtering and analysis"**,*Proc. of IEEE Winter Workshop on Nonlinear digital signal processing*, pp. 1.2.4.1-1.2.4.6, 1993.**N.Nikolaidis**,**I.Pitas**and**M.G.Strintzis**,**"Combined evaluation of motion and disparity vector fields for stereoscopic sequence coding"**,*Proc. of Computer Analysis of Images and Patterns (CAIP93)*, pp. 387-394, 1993.**I.Pitas**and**A.N.Venetsanopoulos**,**"Nonlinear digital signal/image processing:overview and perspectives"**,*Proc. of IEEE Winter Workshop on Nonlinear digital signal processing*, 1993 (invited paper).**I.Pitas**and**A.N.Venetsanopoulos**,**"Application of adaptive order statistic filters in digital image/image sequence filtering"**,*Proc. of IEEE Int. Symposium on circuits and systems*, vol. 1, pp. 327-330, 1993.**I.Pitas**and**C.Lialios**,**"Seismic image segmentation techniques"**,*Proc. of the Int. Conf. on Image processing:theory and applications*, 1993.**I.Pitas**,**"Application of multichannel two-dimensional AR modeling to color image processing"**,*Proc. of Int. Conf. on Image processing: theory and applications*, 1993.**I.Pitas**,**"State of the art of morphological and nonlinear digital image processing"**,*Proc. of IEE Colloquium on morphological and nonlinear image processing techniques*, 1993.**H.Sahinoglou**,**S.Malasiotis**,**N.Nikolaidis**,**N.Grammalidis**,**M.G.Strintzis**and**I.Pitas**,**"A motion/disparity vector field smoothing algorithm"**,*Proc. of 1993 Picture Coding Symposium*, 1993.**D.Tzovaras**,**M.G.Strintzis**,**H.Sahinoglou**and**I.Pitas**,**"Use of multiresolution techniques for vector field coding in motion and disparity estimation"**,*Proc. of the Int. Congress on Communication and Control*, August, 1993.**D.Tzovaras**,**M.G.Strintzis**and**I.Pitas**,**"Multiresolution block matching techniques for motion and disparity estimation"**,*Proc. of 1993 Picture Coding Symposium*, 1993.**K.Lyroudia**,**C.Palakidis**,**I.Pitas**,**A.Manthos**and**N.Nikolaidis**,**"Three-dimensional reconstruction of pulpal vessels and nerve endings using transmission electron microscopy"**,*Proc. of the 6th Biennial Congress,European Society of Endodontology*, pp. 16, 11-13 November, 1993.**K.Lyroudia**,**I.Pitas**,**N.Nikolaidis**and**C.Palakidis**,**"Three-dimensional Computerized Microscopy with Applications in the study of Dental Pulp"**,*Proc. of ICB-NIH Workshop on Image Processing in Medicine and Biology*, May, 1993.

**G.Angelopoulos**and**I.Pitas**,**"2-D FFT algorithms with parallel bit reversion on hypercube computers"**,*Proc. of the EUSIPCO92 Conf.*, pp. 921-924, 1992.**A.Kanlis**,**M.G.Strintzis**and**I.Pitas**,**"Optimum filters in the construction of pyramid image series"**,*Proc. of Int. Symposium on signals,systems and electronics(ISSSE92)*, pp. 142-145, 1992.**C.Kotropoulos**,**E.Auge**and**I.Pitas**,**"Two layer Learning Vector Quantizer for color image quantization"**,*Proc. of Signal Processing VI: Theories and Applications*, pp. 1177-1180, 1992.**I.Pitas**and**P.Kiniklis**,**"Multichannel histogram equalization with applications in the HSI color space"**,*Proc. of the EUSIPCO92 Conf.*, pp. 1469-1472, 1992.**I.Pitas**and**G.Maratos**,**"Adaptation of nonlinear filter length via probabilistic hill climbing algorithms"**,*Proc. of Int. Symposium on signals, systems and electronics(ISSSE92)*, pp. 664-667, 1992.**I.Pitas**and**T.Kilindris**,**"A software package for parallel color and grayscale image processing"**,*Proc. of the ERCIM Workshop on Parallel Architectures for Computer Vision*, pp. 142-148, 1992.**I.Pitas**,**"Digital image processing and analysis in remote sensing"**,1992.**M.G.Strintzis**,**X.Magnisalis**,**C.Kotropoulos**,**I.Pitas**and**N.Maglaveras**,**"Maximum likelihood signal-adaptive filtering of speckle in ultrasound B-mode images"**,*Proc. of IEEE Int. Conf. on Engineering in Medicine and Biology Society Conf. (EMBS '92)*, pp. 1870-1871, November, 1992.**D.Tzovaras**,**M.G.Strintzis**and**I.Pitas**,**"Image coding using nonlinear principal component analysis and vector quantization"**,*Proc. of Int. Symposium on signals,systems and electronics (ISSSE92)*, pp. 883-886, 1992.**K.Lyroudia**,**P.Zervas**,**N.Nikolaidis**and**I.Pitas**,**"Computerized three-dimensional reconstruction of dental pulp vessels and nerve bundles by using light microscope"**,*Proc. of the 12th Hellenic Dental Conf.*, 1992.

**G.Angelopoulos**and**I.Pitas**,**"Multichannel Wiener filters in color image restoration based on AR color image modeling"**,*Proc. of the IEEE Int. Conf. on Acoustics, Speech and Signal Processing*, pp. 2517-2520, 1991.**G.Angelopoulos**and**I.Pitas**,**"Multichannel image modeling in Wiener filter design for color image restoration"**,*Proc. of MELECON 1991*, 1991.**G.Angelopoulos**and**I.Pitas**,**"Two-dimensional FFT algorithms on hypercube machines"**,*Proc. of the 3rd Int. Conf. on Applications of Transputers*, pp. 754-759, August, 1991.**E.Auge**and**I.Pitas**,**"Segmentation of color images by using the Learning Vector Quantizer"**,*Proc. of PCA Bonn Workshop*, 1991.**C.Kotropoulos**and**I.Pitas**,**"Design of the constrained adaptive LMS L-filters"**,*Proc. of the IEEE Mediterranean Electrotechnical Conf. (MELECON '91)*, pp. 379-382, May, 1991.**C.Kotropoulos**and**I.Pitas**,**"Constrained adaptive LMS L-filters"**,*Proc. of the IEEE Int. Conf. on Acoustics, Speech and Signal Processing*, pp. 1665-1668, 1991.**C.Kotropoulos**and**I.Pitas**,**"Nonlinear filtering of speckle noise in ultrasonic images"**,*Proc. of Computer Analysis of Images and Patterns Conf. (CAIP '91)*, pp. 118-123, 1991.**P.Ligdas**and**I.Pitas**,**"Vector radix 2x2 FFT implementation on a transputer machine"**,*Proc. of PCA Bonn Workshop*, 1991.**X.Magnisalis**,**C.Kotropoulos**,**I.Pitas**and**M.G.Strintzis**,**"Use of fractal dimension in signal-adaptive filters for speckle reduction in ultrasound B-mode images"**,*Proc. of the 10th Int. Congress for Medical Informatics (MIE '91)*, pp. 550-554, 1991.**I.Pitas**,**A.Maglara**and**C.Kotropoulos**,**"Morphological Voronoi tessellation and Delauney triangulation"**,*Proc. of Computer Analysis of Images and Patterns Conf. (CAIP '91)*, pp. 184-189, 1991.**I.Pitas**and**A.N.Venetsanopoulos**,**"Morphological shape representation"**,*Proc. of the IEEE Int. Conf. on Acoustics, Speech and Signal Processing*, pp. 2381-2384, 1991.**I.Pitas**,**"ESPRIT Parallel Computing Action:an overview"**,*Proc. ofTransputer applications 91*, 1991.

**G.Angelopoulos**and**I.Pitas**,**"Parallel algorithms in color image restoration"**,*Proc. of ESPRIT PCA Workshop*, pp. 81-85, 1990.**G.Angelopoulos**and**I.Pitas**,**"Parallel implementation of two-dimensional FFT algorithms on a hypercube"**,*Proc. of PCA Ispra Workshop*, pp. 401-405, 1990.**C.Kotropoulos**and**I.Pitas**,**"Texture description rules for geophysical image segmentation"**,*Proc. of Signal Processing V: Theories and Applications*, pp. 597-600, 1990.**N.Maglaveras**,**D.Ziabaras**,**I.Pitas**and**M.G.Strintzis**,**"Parallel solution of multipath wave equation using transputers"**,*Proc. of PCA Ispra Workshop*, 1990.**I.Pitas**and**A.N.Venetsanopoulos**,**"LMS and RLS Adaptive L-filters"**,*Proc. of the IEEE Int. Conf. on Acoustics*, pp. 1389-1392, 1990.**I.Pitas**,**"Morphological signal decomposition"**,*Proc. of the IEEE Int. Conf. on Acoustics*, pp. 2169-2172, 1990.**I.Pitas**,**"Marginal order statistics in color image processing"**,*Proc. of Signal Processing V: Theories and applications*, pp. 809-812, 1990.**I.Pitas**and**S.Vougioukas**,**"Adaptive nonlinear filters based on order statistics"**,*Proc. of Signal Processing V: Theories and applications*, pp. 397-400, 1990.**I.Pitas**and**A.Maglara**,**"Morphological range image decomposition"**,*Proc. of Signal Processing V: Theories and applications*, pp. 1683-1686, 1990.**I.Pitas**,**"ESPRIT PCA:Signal Processing and neural networks group"**,*Proc. of PCA Ispra Workshop*, 1990.

**G.Angelopoulos**and**I.Pitas**,**"Least-squares multichannel filters in color image restoration"**,*Proc. of European Conf. on Circuit Theory and Design*, pp. 114-117, 1989.**C.Kotropoulos**,**I.Pitas**and**P.Tyraskis**,**"Segmentation of seismic images"**,*Proc. 1st Hellenic Conf. Geophysics*, pp. 112-122, 1989 (in Greek).**I.Pitas**and**C.Kotropoulos**,**"Texture analysis and segmentation of seismic images"**,*Proc. of IEEE Int. Conf. on Acoustics, Speech and Signal Processing*, pp. 1337-1340, 1989.**I.Pitas**and**A.N.Venetsanopoulos**,**"Adaptive L-filters"**,*Proc. of European Conf. on Circuit Theory and Design*, pp. 580-584, 1989.**I.Pitas**and**A.N.Venetsanopoulos**,**"Morphological shape representation and recognition"**,*Proc. of the 3rd Int. Workshop on timevarying image processing and moving object recognition*, pp. 49-56, 1989.**I.Pitas**,**"Fast running ordering and max/min selection algorithms"**,*Proc. of CAIP89*, pp. 32-37, 1989.**I.Pitas**,**"A Viterbi algorithm for region segmentation and edge detection"**,*Proc. of CAIP89*, pp. 129-133, 1989.

**I.Pitas**and**A.N.Venetsanopoulos**,**"A general nonlinear filter structure for image processing, Invited tutorial"**,*Proc. of IEEE Int. Symposium on Circuits and Systems*, pp. 949-952, 1988.

**I.Pitas**and**A.N.Venetsanopoulos**,**"Probabilistic seismic migration based on the Bayesian estimation"**,*Proc. of the eleventh GRETSI Int. Conf. on Digital Signal processing*, June, 1987.**I.Pitas**and**A.N.Venetsanopoulos**,**"Shape decomposition by mathematical morphology"**,*Proc. of Int. Conf. on Computer Vision*, pp. 621-625, June, 1987.**I.Pitas**and**A.N.Venetsanopoulos**,**"A novel general class of nonlinear filters for image processing"**,*Proc. of MELECON 87 and 34th Congress on Electronics (joint conf.)*, pp. 433-436, 1987.**I.Pitas**and**A.N.Venetsanopoulos**,**"AGIS: an expert system for automated geophysical interpretation of seismic images"**,*Proc. of the IEEE Int. Conf. on Acoustics*, pp. 2256-2259, 1987.**I.Pitas**and**A.N.Venetsanopoulos**,**"Detection of seismic events in the earth subsurface"**,*Proc. of the Int. Conf. on Digital Signal Processing*, pp. 932-937, 1987.**I.Pitas**,**"A Viterbi algorithm for image edge detection"**,*Proc. of the 11th Int. Conf. GRETSI on Digital Signal Processing*, 1987.**I.Pitas**,**"Computer Vision: an overview"**,*Proc. of the 1st Conf. on Robotics*, 1987.

**I.Pitas**and**A.N.Venetsanopoulos**,**"Knowledge-based image processing for geophysical interpretation"**,*Proc. of European Signal Processing Conf.*, pp. 1211-1214, 1986.**I.Pitas**and**M.G.Strintzis**,**"An efficient and systematic technique for the parallel implementation of DFT algorithms"**,*Proc. of the European Signal Processing Conf.*, pp. 1251-1254, 1986.**I.Pitas**and**A.N.Venetsanopoulos**,**"Edge detectors based on nonlinear filters"**,*Proc. of the European Conf. on Signal Processing*, pp. 937-940, 1986.

**I.Pitas**and**A.N.Venetsanopoulos**,**"Symmetries of three-dimensional digital filters and their application to filter design"**,*Proc. of the IEEE Int. Conf. on Circuits and Systems*, 1985.**I.Pitas**and**A.N.Venetsanopoulos**,**"On the performance of edge detectors based on nonlinear filters"**,*Proc. of the IAESTED Int. Symposium on Applied Signal Processing and Digital Filtering: Applied Signal Processing, M. H. Hamza editor*, pp. 152-154, 1985.**I.Pitas**and**A.N.Venetsanopoulos**,**"Bayesian estimation of medium properties in wavefield inversion techniques"**,*Proc. of the IEEE Int. Conf. on Acoustics*, pp. 830-833, 1985.**A.N.Venetsanopoulos**and**I.Pitas**,**"A class of nonlinear mean filters for image processing"**,*Proc. of the 7th European Conf. on Circuit Theory and Design, Prague*, pp. 594-597, 1985.

**I.Pitas**and**M.G.Strintzis**,**"Two-dimensional convolution algorithms with the minimal multiplications"**,*Proc. of the Int. Conf. on Signal Processing*, pp. 785-788, 1984.**I.Pitas**and**A.N.Venetsanopoulos**,**"Transform decomposition realization of two-dimensional digital filters"**,*Proc. of the 1984 Conf. on Information Sciences and Systems*, 1984.**I.Pitas**and**A.N.Venetsanopoulos**,**"Symmetries in three-dimensional digital filters"**,*Proc. of the 12th Biennial Symposium in communications*, pp. B.2.1-B2.1.5, 1984.**I.Pitas**and**A.N.Venetsanopoulos**,**"Multidimensional filter design through symmetries"**,*Proc. of Telecommunications and control*, pp. 296-299, 1984.**I.Pitas**and**A.N.Venetsanopoulos**,**"Nonlinear statistical means and their application to image processing"**,*Proc. of the IEEE Int. Conf. on Energy and Communications*, pp. 270-273, 1984.

**I.Pitas**and**M.G.Strintzis**,**"On the computation of two-dimensional DFTs under memory constraints"**,*Proc. of Signal processing II: Theories and Applications, H.W. Schuessler editor*, pp. 739-742, 1983.**I.Pitas**and**M.G.Strintzis**,**"Algorithms and structures for convolutions over Galois Fields"**,*Proc. of the 9th Conf. on Signal Processing its Applications*, pp. 341-345, 1983.**I.Pitas**and**M.G.Strintzis**,**"Floating-point error analysis of two efficient algorithms used in the fast computation of two-dimensional DFTs"**,*Proc. of Signal Processing II: Theories and Applications, H.W. Schuessler editor*, pp. 219-222, 1983.**I.Pitas**and**M.G.Strintzis**,**"Techniques for the parallel implementation of DFT algorithms"**,*Proc. of the 1983 IAESTED Symposium on Measurement and Control*, pp. 246-250, 1983.**I.Pitas**,**M.G.Strintzis**,**S.Grippas**and**C.Xerostylides**,**"Machine classification of ishemic electrocardiograms"**,*Proc. of the IEEE Mediterranean Electrotechnical Conf. (MELECON)*, 1983.**I.Pitas**,**M.G.Strintzis**and**N.Maglaveras**,**"Two-dimensional cubic convolution interpolation in computer tomography"**,*Proc. of the IEEE Mediterranean Electrotechnical Conf. (MELECON)*, 1983.

**I.Pitas**and**M.G.Strintzis**,**"On the multiplicative complexity of two-dimensional fast convolution algorithms"**,*Proc. of the IEEE Int. Symposium on Information Theory*, pp. 129-130, 1982.

**I.Pitas**and**M.G.Strintzis**,**"In-place computation of the DFT of multi-indexed sequences"**,*Proc. of the Int. Conf. on Signal Processing*, pp. 600-613, 1981.

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