Publications | IVA
Image and Video Analysis
Publications
2016

Journals

C. Varytimidis, K. Rapantzikos, Y. Avrithis, S. Kollias. α-shapes for local feature detection. In Pattern Recognition, vol 50, no. 1, pp. 56-73, February 2016.
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2014

Journals

G. Tolias, Y. Kalantidis, Y. Avrithis, S. Kollias. Towards large-scale geometry indexing by feature selection. In Computer Vision and Image Understanding, vol 120, no. 3, pp. 31-45, March 2014.
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Conferences

C. Varytimidis, K. Rapantzikos, Y. Avrithis, S. Kollias. Improving local features by dithering-based image sampling. In Proceedings of Asian Conference on Computer Vision (ACCV 2014), Singapore, November 2014.
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2013

Conferences

C. Varytimidis, K. Rapantzikos, S. Kollias. Wα SH-ing visual repositories: searching Europeana using local features. In Proceedings of International Conference on Digital Signal Processing (DSP 2013), July 2013.
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2011

Journals

K. Rapantzikos, Y. Avrithis, S. Kollias. Spatiotemporal features for action recognition and salient event detection. In Cognitive Computation, special issue on Saliency, attention, visual search and picture scanning, vol 3, no. 1, pp. 167-184, 2011.
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Y. Kalantidis, G. Tolias, Y. Avrithis, M. Phinikettos, E. Spyrou, P. Mylonas, S. Kollias. VIRaL: Visual Image Retrieval and Localization. In Multimedia Tools and Applications, 2011.
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2010

Conferences

K. Rapantzikos, Y. Avrithis, S. Kollias. Detecting Regions from Single Scale Edges. In Proceedings of International Workshop on Sign, Gesture and Activity (SGA'10), European Conference on Computer Vision (ECCV 2010), September 2010.
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E. Spyrou, Y. Kalantidis, G. Tolias, Ph. Mylonas, S. Kollias. Intelligent Content Retrieval using a Visual Vocabulary and Geometric Constraints. In Proceedings of FUZZ-IEEE 2010 (IEEE WCCI 2010), in conjunction with The 2010 IEEE World Congress on Computational Intelligence, July 2010.
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P. Tzouveli, K. Raftopoulos, K. Ntalianis, S. Kollias. Semantic Object Watermark Re-Synchronization Based on Skeleton Vertex Corresponds. In Proceedings of ACM Multimedia 2010 Workshop - Multimedia in Forensics, Security and Intelligence (MiFor) (MiFor - ACM Multimedia 2010), October 2010.
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Y. Kalantidis, E. Spyrou, Ph. Mylonas, S. Kollias. Using a Region and Visual Word Approach Towards Semantic Image Retrieval. In Proceedings of 5th Workshop on Semantic Media Adaptation and Personalization (SMAP 2010), Limassol, Cyprus, December 2010.
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Book Chapters

G. Caridakis, P. Tzouveli, L. Malatesta, A. Raouzaiou, K. Karpouzis, S. Kollias. Affective e-Learning System: Analysis of Learners State. In Affective, Interactive and Cognitive Methods for E-Learning Design: Creating an Optimal Education Experience, A. Tzanavari, N. Tsapatsoulis (Eds.), IGI Global , 2010.
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2009

Journals

S. Asteriadis, P. Tzouveli, K. Karpouzis, S. Kollias. Estimation of behavioral user state based on eye gaze and head pose—application in an e-learning environment. In Multimedia Tools and Applications, Springer, vol 41, no. 3, pp. 469-493, February 2009.
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K. Ntalianis, P. Tzouveli, S. Kollias. Protection of Real and Artwork Human Objects Based on a Chaotic Moments Modulation Method. In Journal of Information Assurance and Security, 2009.
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K. Rapantzikos, N. Tsapatsoulis, Y. Avrithis, S. Kollias. Spatiotemporal Saliency for Video Classification. In Signal Processing: Image Communication, vol 24, no. 7, pp. 557-571, August 2009.
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P. Tzouveli, N. Simou, G. Stamou, S. Kollias. Semantic Classification of Byzantine Icons. In IEEE Intelligent Systems, vol 24, no. 2, pp. 35-43, March, April 2009.
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N. Simou, Th. Athanasiadis, S. Kollias, G. Stamou. Semantic Adaptation of Neural Network Classifiers in Image Segmentation. In Neural Network World, vol 19, no. 5, pp. 561-579, October 2009.
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Ph. Mylonas, E. Spyrou, Y. Avrithis, S. Kollias. Using Visual Context and Region Semantics for High-Level Concept Detection. In IEEE Transactions on Multimedia, vol 11, no. 11, pp. 229-243, February 2009.
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Conferences

K. Rapantzikos, Y. Avrithis, S. Kollias. Dense saliency-based spatiotemporal feature points for action recognition. In Proceedings of International Conference on Computer Vision and Pattern Recognition (CVPR 2009), Miami, USA, June 2009.
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Y. Kalantidis, G. Tolias, E. Spyrou, Ph. Mylonas, Y. Avrithis, S. Kollias. Visual Image Retrieval and Localization. In Proceedings of 3ο Πανελλήνιο Συνέδριο Φοιτητών Ηλεκτρολόγων Μηχανικών και Μηχανικών Υπολογιστών, Thessaloniki, Greece, April 2009.
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2008

Journals

P. Tzouveli, Ph. Mylonas, S. Kollias. An intelligent e-learning system based on learner profiling and learning resources adaptation. In Computers and Education, vol 51, no. 1, pp. 224-238, August 2008.
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N. Simou, Th. Athanasiadis, G. Stoilos, S. Kollias. Image Indexing and Retrieval using Expressive Fuzzy Description Logics. In Signal, Image and Video Processing, vol 2, no. 4, pp. 321-335, December 2008.
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Ph. Mylonas, Th. Athanasiadis, M. Wallace, Y. Avrithis, S. Kollias. Semantic Representation of Multimedia Content - Knowledge Representation and Semantic Indexing. In Springer Multimedia Tools and Applications, vol 39, no. 3, pp. 293-327, September 2008.
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Conferences

N. Simou, Th. Athanasiadis, S. Kollias. An Architecture for Multimedia Analysis and Retrieval Based on Fuzzy Description Logics. In Proceedings of 2nd K-Space PhD Students Workshop, Paris, France, July 2008.
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P. Tzouveli, A. Schmidt, M.Schneider, A. Symvonis, S. Kollias. Adaptive Reading Assistance for the Inclusion of Students with Dyslexia: The AGENT-DYSL approach. In Proceedings of 8th IEEE International Conference on Advanced Learning Technologies (ICALT 2008), July 2008.
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V. Giannekou, P. Tzouveli, Y. Avrithis and S.Kollias. Affine invariant curve matching using normalization and curvature scale-space. In Proceedings of 6th International Workshop on Content-Based Multimedia Indexing (CBMI 2008), London, UK, June 2008.
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S. Asteriadis, P. Tzouveli, K. Karpouzis, S. Kollias. A non-intrusive method for user focus of attention estimation in front of a computer monitor. In Proceedings of IEEE Conference on Automatic Face and Gesture Recognition (FG 2008), Amsterdam, The Netherlands, June 2008.
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N. Simou, Th. Athanasiadis, S. Kollias, G. Stamou, A. Stafylopatis. Semantic Adaptation of Neural Network Classifiers in Image Segmentation. In Proceedings of 18th International Conference on Artificial Neural Networks (ICANN 2008), Prague, Czech Republic, September 2008.
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K. Raftopoulos, P. Tzouveli, K. Ntalianis, S. Kollias, D.Kalomoirakis, N. Fyssas, G. Foukaneli. Saint Classification in Byzantine Art. In Proceedings of 14th International Conference on Virtual Systems and MultiMedia (VSMM 2008), October 2008.
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P. Tzouveli, K. Ntalianis and S. Kollias. Semantic Region Protection Using Hu Moments and a Chaotic Pseudo-random Number Generator. In Proceedings of International IEEE Workshop on Computational Intelligence in Security for Information Systems (CISIS 2008), October 2008.
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P. Tzouveli, N. Simou, G. Stamou, S. Kollias, D. Kalomoirakis, G. Foukaneli, N. Fyssas. Sacred Figure Recognition based on Byzantine Iconography Knowledge. In Proceedings of Conference on Digital Heritage in the new knowledge environment: shared spaces & open paths to cultural content, Athens, Greece, November 2008.
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2007

Journals

K. Rapantzikos, N. Tsapatsoulis, Y. Avrithis, S. Kollias. A Bottom-Up Spatiotemporal Visual Attention Model for Video Analysis. In IET Image Processing, vol 1, no. 2, pp. 237-248, June 2007.
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Ph. Mylonas, P. Tzouveli, S. Kollias. E-learning and intelligent content adaptation: an integrated approach. In International Journal of Continuing Engineering Education and Life-Long Learning, vol 17, no. 4/5, pp. 273-293, September 2007.
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Th. Athanasiadis, Ph. Mylonas, Y. Avrithis, S. Kollias. Semantic Image Segmentation and Object Labeling. In IEEE Transactions on Circuits and Systems for Video Technology, vol 17, no. 3, pp. 298 - 312, March 2007.
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Conferences

Th. Athanasiadis, S. Kollias. A Graph Based, Semantic Region Growing Approach in Image Segmentation. In Proceedings of 1st K-Space PhD Students Workshop, Berlin, Germany, September 2007.
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P. Tzouveli, K. Ntalianis, A. Symvonis, S. Kollias. An intelligent adaptable reading system targeting people with learning difficulties. In Proceedings of 4th Greek conference on ICT and Education, Syros, Greece , May 2007.
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P. Tzouveli, E. Mitropoulou, K. Ntalianis, S. Kollias, A. Symvonis. Design of an Accommodative Intelligent Educational Enviroments For Dyslexic Learners. In Proceedings of 11th Conference on Learning Difficulties in the Framework of School Education, Athens, Greece, 2007.
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N. Simou, Th. Athanasiadis, V. Tzouvaras, S. Kollias. Multimedia Reasoning with f-SHIN. In Proceedings of 2nd International Workshop on Semantic Media Adaptation and Personalization (SMAP 2007), London, UK, December 2007.
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S. Asteriadis, P. Tzouveli, K. Karpouzis, S. Kollias. Non-verbal feedback on user interest based on gaze direction and head pose. In Proceedings of 2nd International Workshop on Semantic Media Adaptation and Personalization (SMAP 2007), London, UK, December 2007.
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K. Rapantzikos, Y. Avrithis, S. Kollias. SALIENShrink: Saliency-Based Image Denoising. In Proceedings of 14th International Conference on Image Processing (ICIP 2007), San Antonio, Texas, USA, September 2007.
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K. Rapantzikos, Y.Avrithis, S. Kollias. Spatiotemporal saliency for event detection and representation in the 3D Wavelet Domain: Potential in human action recognition. In Proceedings of ACM International Conference on Image and Video Retrieval (CIVR 2007), Amsterdam, The Netherlands, July 2007.
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Book Chapters

Ph. Mylonas, P. Tzouveli, S. Kollias. An integrated approach towards intelligent educational content adaptation. In Emerging Artificial Intelligence Applications in Computer Engineering, IOS Press, October 2007.
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2006

Journals

M. Wallace, Y. Avrithis, S. Kollias. Computationally efficient sup-t transitive closure for sparse fuzzy binary relations. In Fuzzy Sets and Systems, vol 157, no. 3, pp. 341-372, 2006.
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M. Wallace, Th. Athanasiadis, Y. Avrithis, A. Delopoulos, S. Kollias. Integrating Multimedia Archives: The Architecture and the Content Layer. In IEEE Transactions on Systems, Man, and Cybernetics, Part A, vol 36, no. 1, pp. 34 - 52, January 2006.
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Th. Athanasiadis, M. Wallace, K. Karpouzis, S. Kollias. Utilization of Evidence Theory in the Detection of Salient Regions in Successive CT Images. In Oncology Reports, vol 15, pp. 1071-1076, May 2006.
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Books

P. Tzouveli, S. Kollias. E-questionnaire for innovative adaptive-learning scheme. Idea Group Reference, May 2006.
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Conferences

Th. Athanasiadis, Y. Avrithis, S. Kollias. A Semantic Region Growing Approach in Image Segmentation and Annotation. In Proceedings of 1st International Workshop on Semantic Web Annotations for Multimedia (SWAMM 2006), in conjunction with WWW, Edinburgh, UK, May 2006.
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P. Tzouveli, K. Ntalianis, S. Kollias. Chaotic Encryption Driven Watermarking of Human Video Objects Based on Hu Moments. In Proceedings of 3rd IFIP Conference on Artificial Intelligence Applications & Innovations (AIAI 2006), Athens, Greece, June 2006.
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P. Tzouveli, K. Ntalianis, S. Kollias. Confronting the synchronization problem of semantic region under geometric attacks. In Proceedings of IEEE International Conference on Multimedia & Expo (ICME 2006), Toronto, Canada, July 2006.
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E. Spyrou, G. Koumoulos, Y. Avrithis, S. Kollias. Using Local Region Semantics for Concept Detection in Video. In Proceedings of 1st International Conference on Semantics And digital Media Technology (SAMT 2006), Athens, Greece, December 2006.
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P. Tzouveli, K. Ntalianis, S. Kollias. Video object watermarking using Hu moments . In Proceedings of 13th International Conference on Systems, Signals and Image Processing (IWSSIP 2006), Budapest, Hungary, September 2006.
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Book Chapters

M. Wallace, Ph. Mylonas, G. Akrivas, Y. Avrithis, S. Kollias. Automatic thematic categorization of multimedia documents using ontological information and fuzzy algebra. In Soft Computing in Ontologies and Semantic Web, Ma Z. (Eds.), Springer, 2006.
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A. Raouzaiou, E. Spyrou, K. Karpouzis, S. Kollias. An Intermediate Expressions' Generator System in the MPEG-4 Framework. In Visual Content Processing and Representation, L. Atzori, D. Giusto, R. Leonardi, F. Pereira (Eds.), Springer-Verlag, pp. 129-136, 2006.
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M. Wallace, Y. Avrithis, S. Kollias. Multimedia Archives and Mediators. In Encyclopedia of Multimedia, B. Furht (Eds.), Springer, 2006.
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2005

Conferences

N. Simou, V. Tzouvaras, Y. Avrithis, G. Stamou, S. Kollias. A Visual Descriptor Ontology for Multimedia Reasoning. In Proceedings of Workshop on Image Analysis for Multimedia Interactive Services (WIAMIS 2005), Montreux, Switzerland, April 2005.
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A. Raouzaiou, E. Spyrou, K. Karpouzis, S. Kollias. Emotion Synthesis: an Intermediate Expressions - Generator System in the MPEG-4 Framework. In Proceedings of International Workshop Very Low Bitrate Video Coding (VLBV 2005), Sardinia, Italy, September 2005.
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E. Spyrou, G. Stamou, Y. Avrithis, S. Kollias. Fuzzy Support Vector Machines for Image Classification fusing MPEG-7 Visual Descriptors. In Proceedings of 2nd European Workshop on the Integration of Knowledge,Semantic, and Digital Media Techniques (EWIMT 2005), London, UK, November 2005.
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K. Rapantzikos, Y. Avrithis, S. Kollias. Handling Uncertainty in Video Analysis With Spatiotemporal Visual Attention. In Proceedings of IEEE International Conference on Fuzzy Systems (FUZZ 2005), May 2005.
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P. Tzouveli, K. Ntalianis, S. Kollias. Human Video Object Watermarking Based on HU Moments. In Proceedings of IEEE 2005 Workshop on Signal Processing Systems, November 2005.
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P. Tzouveli, K. Ntalianis, S. Kollias. Human Face Watermarking based on Zernike Moments. In Proceedings of IEEE Symposium on Signal Processing and Information Technology, December 2005.
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Ph. Mylonas, P. Tzouveli, S. Kollias. Intelligent content adaptation in the framework of an integrated e-learning system. In Proceedings of 16th ACM Conf. on Hypertext & Hypermedia - Workshop on Combining Intelligent & Adaptive Hypermedia Methods/Techniques in Web-Based Education Systems, Salzburg, Austria, September 2005.
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K. Rapantzikos, Y. Avrithis, S. Kollias. On the use of spatiotemporal visual attention for video classification. In Proceedings of Int. Workshop on Very Low Bitrate Video Coding (VLBV 2005), Sardinia, Italy, September 2005.
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P.Tzouveli, K. Ntalianis, S. Kollias. Video Objects Watermarking: Hu versus Zernike Moments. In Proceedings of International Workshop Very Low Bitrate Video Coding (VLBV 2005), Sardinia, Italy, July 2005.
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Book Chapters

M. Wallace, Ph. Mylonas, S. Kollias. Detecting and Verifying Dissimilar Patterns in Unlabelled Data. In Soft Computing: Methodologies and Applications, Springer, pp. 247-258, 2005.
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M. Wallace, Y. Avrithis, G. Stamou, S. Kollias. Knowledge-based Multimedia Content Indexing and Retrieval. In Multimedia Content and Semantic Web: Methods, Standards and Tools, Stamou G., Kollias S. (Eds.), Wiley, August 2005.
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2004

Journals

G. Tsechpenakis, K. Rapantzikos, N. Tsapatsoulis, S. Kollias. A Snake Model for Object Tracking in Natural Sequences. In Signal Processing: Image Communication, vol 19, no. 3, pp. 219-238, March 2004.
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G. Tsechpenakis, K. Rapantzikos, N. Tsapatsoulis, S. Kollias. Rule-driven Object Tracking in Clutter and Partial Occlusion with Model-based Snakes. In EURASIP Journal on Applied Signal Processing, vol 6, pp. 841-860, June 2004.
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G. Akrivas, G. B. Stamou, S. Kollias. Semantic Association of Multimedia Document Descriptions through Fuzzy Relational Algebra and Fuzzy Reasoning. In IEEE Transactions on Systems, Man, and Cybernetics, vol 34, no. 2, March 2004.
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P. Tzouveli, S. Kollias. Using e-questionnaire as an improvement to a learners¢ adaptation system. In Learning Technology Newsletter, IEEE Computer Society, vol 6, no. 4, May 2004.
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Conferences

M. Wallace, Th. Athanasiadis, Y. Avrithis, G. Stamou, S. Kollias. A mediator system for hetero-lingual audiovisual content. In Proceedings of International Conference on Multi-platform e-Publishing, Athens, Greece, November 2004.
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M. Wallace, Ph. Mylonas, S. Kollias. Automatic Extraction of Semantic Preferences from Multimedia Documents. In Proceedings of 5th International Workshop on Image Analysis for Multimedia Interactive Services (WIAMIS 2004), Lisboa, Portugal, April 2004.
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A. Raouzaiou, S. Ioannou, G. Akrivas, K. Karpouzis, S. Kollias. Adaptation of Expression Analysis Based on Evaluation Principles. In Proceedings of Fourth European Symposium on Intelligent Technologies and their implementation on Smart Adaptive Systems (EUNITE 2004), Aachen, Germany, June 2004.
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G. Andreou, Ph. Mylonas, M. Wallace, S. Kollias. Offering Access to Personalized Interactive Video. In Proceedings of International Conference on Mathematical Methods and Computational Techniques in Electrical Engineering (1234 2004), Athens, Greece, December 2004.
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Ph. Mylonas, G. Andreou, S. Kollias. Personalised Interactive Video User Experience. In Proceedings of International Conference on Multi-platform e-Publishing, Athens, Greece, November 2004.
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P. Tzouveli, Ph. Mylonas, S. Kollias. SPERO - A personalized integrated e-learning system. In Proceedings of International Association for Development of the Information Society (IADIS 2004), Madrid, Spain, October 2004.
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Tzouveli P., Ntalianis K., Kollias S.. Security of Human Video Objects by Incorporating a Chaos-Based Feedback Cryptographic Scheme. In Proceedings of ACM Multimedia 2004, New York, USA, October 2004.
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Ph. Mylonas, P. Tzouveli, S. Kollias. Towards a personalized e-learning scheme for teachers. In Proceedings of 4th IEEE International Conference on Advanced Learning Technologies (ICALT 2004), Joensuu, Finland, August 2004.
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Ph. Mylonas, K. Karpouzis, G. Andreou, S. Kollias. Towards an integrated personalized interactive video environment. In Proceedings of 6th IEEE International Symposium on Multimedia Software Engineering (ISME 2004), Miami, FL, USA, December 2004.
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Ph. Mylonas, M. Wallace, S. Kollias. Using k-nearest neighbor and feature selection as an improvement to hierarchical clustering. In Proceedings of 3rd Hellenic Conference on Artificial Intelligence (SETN 2004), Samos, Greece, May 2004.
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Tzouveli P., Kollias S.. User adaptation in e-learning enviroments. In Proceedings of IFIP World Computer Congress, Technology Enhanced Learning (IFIP 2004), Toulouse, France, August 2004.
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Book Chapters

P. Tzouveli, G. Andreou, G. Tsechpenakis, Y. Avrithis, S. Kollias. Intelligent Visual Descriptor Extraction from Video Sequences. In Lecture Notes in Computer Science - Adaptive Multimedia Retrieval, Springer-Verlag, pp. 132-146, 2004.
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G. Andreou, Ph. Mylonas, M. Wallace, S. Kollias. Offering Access to Personalized Interactive Video. In WSEAS Transactions on Systems, WSEAS, pp. 3120 - 3124, December 2004.
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Ph. Mylonas, M. Wallace, S. Kollias. Using k-nearest neighbor and feature selection as an improvement to hierarchical clustering. In Methods and Applications of Artificial Intelligence, G. A. Vouros, T. Panayiotopoulos (Eds.), Springer, 2004.
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2003

Journals

P. Daras, I. Kompatsiaris, I. Grinias, G. Akrivas, G. Tziritas, S. Kollias, M. Strintzis. MPEG-4 Authoring Tool Using Moving Object Segmentation and Tracking in Video Shots. In EURASIP Journal of Applied Signal Processing, vol 2003, no. 9, pp. 861-877, February 2003.
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Conferences

P. Tzouveli, K. Ntalianis, S. Kollias. Automatic Videoconference Objects Watermarking Using Object Adapted Qualified Significant Wavelet Trees. In Proceedings of International Workshop Very Low Bitrate Video Coding (VLBV 2003), Madrid, Spain, September 2003.
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Giorgos Akrivas and Stefanos Kollias. Detection of Composite Geometric Structures through Possibilistic Reasoning. In Proceedings of European Symposium on Intelligent Technologies, Hybrid Systems and their implementation on Smart Adaptive Systems (EUNITE 2003), June 2003.
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M. Wallace, Ph. Mylonas, S. Kollias. Detecting and Verifying Dissimilar Patterns in Unlabelled Data. In Proceedings of 8th Online World Conference on Soft Computing in Industrial Applications (WSC8 2003), October 2003.
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P. Tzouveli, G. Andreou, G. Tsechpenakis, Y. Avrithis, S. Kollias. Intelligent Visual Descriptor Extraction from Visual Sequences. In Proceedings of International Workshop on Adaptive Multimedia Retrieval (AMR 2003), Hamburg, Germany, September 2003.
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K. Karpouzis, A. Raouzaiou, P. Tzouveli, S.Ioannou, S. Kollias. MPEG-4: One multimedia standard to unite all. In Proceedings of IEEE International Conference on Multimedia & Expo (ICME 2003), Baltimore, MD, USA, July 2003.
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G. Tsechpenakis, K. Rapantzikos, N. Tsapatsoulis, S. Kollias. Object Tracking in Clutter and Partial Occlusion through Rule-driven Utilization of Snakes. In Proceedings of IEEE International Conference on Multimedia & Expo (ICME 2003), Baltimore, USA, July 2003.
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P.Tzouveli, N. Tsapatsoulis, S. Kollias, M. Michaelidou. On the Development of User Adapted E-learning Schemes. In Proceedings of International Conference on New Horizons in Industry and Education (NHIBE 2003), Santorini, Greece, August 2003.
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G. Stamou, Y. Avrithis, S. Kollias, F. Marques, P. Salembier. Semantic Unification of Heterogenous Multimedia Archives. In Proceedings of 4th European Workshop on Image Analysis for Multimedia Interactive Services (WIAMIS 2003), London, UK, April 2003.
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M. Wallace, G. Akrivas, Ph. Mylonas, Y. Avrithis, S. Kollias. Using context and fuzzy relations to interpret multimedia content. In Proceedings of Third International Workshop on Content-Based Multimedia Indexing (CBMI) (CBMI 2003), Rennes, France, September 2003.
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2002

Journals

A. Doulamis, N. Doulamis, Y. Avrithis, S. Kollias. A Fuzzy Video Content Representation for Video Summarization and Content-Based Retrieval (Erratum). In Signal Processing, vol 80, pp. 1049-1067, June 2002.
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Conferences

P.Tzouveli, K. Ntalianis, N. Tsapatsoulis, S.Kollias. Automatic face region watermarking using qualified significant wavelet trees . In Proceedings of 9th International Workshop on Systems, Signal and Image Processing,Control Systems Centre (IWSSIP 2002), Manchester, UK, November 2002.
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G. Akrivas, M. Wallace, G. Andreou, G. Stamou, S. Kollias. Context - Sensitive Semantic Query Expansion. In Proceedings of IEEE International Conference on Artificial Intelligence Systems (ICAIS 2002), Divnomorskoe, Russia, September 2002.
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G. Akrivas, M. Wallace, G. Stamou, S. Kollias. Context - Sensitive Query Expansion Based on Fuzzy Clustering of Index Terms. In Proceedings of Flexible Query Answering Systems (FQAS 2002), Copenhagen, Denmark, October 2002.
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Y. Avrithis, G. Stamou, A. Delopoulos, S. Kollias. Intelligent Semantic Access to Audiovisual Content. In Proceedings of 2nd Hellenic Conference on Artificial Intelligence (SETN 2002), Thessaloniki, Greece, April 2002.
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G. Tsechpenakis, G. Akrivas, G. Andreou, G. Stamou, S. Kollias. Knowledge - Assisted Video Analysis and Object Detection. In Proceedings of European Symposium on Intelligent Technologies, Hybrid Systems and their implementation on Smart Adaptive Systems (EUNITE 2002), Algarve, Portugal, September 2002.
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M. Wallace, G. Akrivas, G. Stamou, S. Kollias. Representation of user preferences and adaptation to context in multimedia content-based retrieval. In Proceedings of Workshop on Multimedia Semantics, Theory and Practice of Informatics (SOFSEM 2002), Milovy, Czech Republic, November 2002.
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Book Chapters

G. Akrivas, M. Wallace, G. Stamou, S. Kollias. Context - Sensitive Query Expansion Based on Fuzzy Clustering of Index Terms. In Flexible Query Answering Systems, Andreasen T., Motro A., Christiansen H., Larsen H.L. (Eds.), Springer, July 2002.
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S. Ioannou, Y. Avrithis, G. Stamou, S. Kollias. Fuzzy Data Fusion For Multiple Cue Image And Video Segmentation. In Fuzzy Technologies and Applications, E. Kerre (Eds.), Springer-Verlag, May 2002.
[ Abstract ] [ Bibtex ]
Y. Avrithis, G. Stamou, A. Delopoulos, S. Kollias. Intelligent Semantic Access to Audiovisual Content. In Lecture Notes in Artificial Intelligence, Springer-Verlag, pp. 215-224, April 2002.
[ Abstract ] [ Bibtex ] [ PDF ]
2001

Journals

Y. Avrithis, Y. Xirouhakis, S. Kollias. Affine-Invariant Curve Normalization for Object Shape Representation, Classification and Retrieval. In Machine Vision and Applications, vol 13, no. 2, pp. 80-94, 2001.
[ Abstract ] [ Bibtex ] [ PDF ]
N. Tsapatsoulis, Y. Avrithis, S. Kollias. Facial Image Indexing in Multimedia Databases. In Pattern Analysis and Applications, vol 4, no. 2, pp. 93-107, 2001.
[ Abstract ] [ Bibtex ] [ PDF ]

Conferences

G. Akrivas, S. Ioannou, E. Karakoulakis, K. Karpouzis, Y. Avrithis, A. Delopoulos, S. Kollias, I. Varlamis, M. Vaziriannis. An Intelligent System for Retrieval and Mining of Audiovisual Material Based on the MPEG-7 Description Schemes. In Proceedings of European Symposium on Intelligent Technologies, Hybrid Systems and their implementation on Smart Adaptive Systems (EUNITE 2001), Tenerife, Spain, December 2001.
[ Abstract ] [ Bibtex ] [ PDF ]
A. Delopoulos, S. Kollias, Y. Avrithis, W.Haas, K. Majcen. Unified Intelligent Access to Heterogeneous Audiovisual Content. In Proceedings of International Workshop in Content-Based Multimedia Indexing (CBMI 2001), Brescia, Italy, September 2001.
[ Abstract ] [ Bibtex ] [ PDF ]
2000

Journals

A. Doulamis, N. Doulamis, Y. Avrithis, S. Kollias. A Fuzzy Video Content Representation for Video Summarization and Content-Based Retrieval. In Signal Processing Journal, vol 80, no. 6, pp. 1049-1067, June 2000.
[ Abstract ] [ Bibtex ] [ PDF ]
N. Doulamis, A. Doulamis, Y. Avrithis, K. Ntalianis, S. Kollias. Efficient Summarization of Stereoscopic Video Sequences. In IEEE Transactions on Circuits and Systems for Video Technology, vol 10, no. 4, pp. 501-517, June 2000.
[ Abstract ] [ Bibtex ] [ PDF ]

Conferences

Y. Avrithis, Y. Xirouhakis, S. Kollias. Affine-Invariant Curve Normalization for Shape-Based Retrieval. In Proceedings of International Conference on Pattern Recognition (ICPR 2000), Barcelona, Spain, September 2000.
[ Abstract ] [ Bibtex ] [ PDF ]
Y. Avrithis, N. Tsapatsoulis, S. Kollias. Broadcast News Parsing Using Visual Cues: A Robust Face Detection Approach. In Proceedings of IEEE International Conference on Multimedia and Expo (ICME 2000), New York City, NY, USA, July 2000.
[ Abstract ] [ Bibtex ] [ PDF ]
Y. Avrithis, N. Tsapatsoulis, S. Kollias. Color-Based Retrieval of Facial Images. In Proceedings of European Signal Processing Conference (EUSIPCO 2000), Tampere, Finland, September 2000.
[ Abstract ] [ Bibtex ] [ PDF ]
N.Tsapatsoulis, Y. Avrithis, S. Kollias. Face Detection for Multimedia Applications. In Proceedings of Proceedings of the International Conference on Image Processing (ICIP 2000), Vancouver, BC, Canada, September 2000.
[ Abstract ] [ Bibtex ] [ PDF ]
Anastasios D. Doulamis, Nikolaos Doulamis, Georgios Akrivas, Stefanos Kollias. Non-sequential video content representation using temporal variation of feature vectors. In Proceedings of IEEE International Conference on Consumer Electronics (ICCE 2000), 2000.
[ Abstract ] [ Bibtex ] [ PDF ]
G. Akrivas, N. Doulamis, A. Doulamis, S. Kollias. Scene Detection Methods for MPEG- encoded Video Signals. In Proceedings of Mediterranean Electrotechnical Conference (MELECON 2000), Nicosia, Cyprus, May 2000.
[ Abstract ] [ Bibtex ] [ PDF ]
1999

Journals

Y. Avrithis, A. Doulamis, N. Doulamis and S. Kollias. A Stochastic Framework for Optimal Key Frame Extraction from MPEG Video Databases. In Computer Vision and Image Understanding, vol 75, no. 1/2, pp. 3-24, July 1999.
[ Abstract ] [ Bibtex ] [ PDF ]
Gabriel Tsechpenakis, Yannis Avrithis, Stefanos Kollias. Verification Report of Core Experiment on Fast Block-Matching Motion Estimation using Advanced Diamond Zonal Search with Embedded Radar. In ISO/IEC JTC1/SC29/WG11, MPEG99/M5116, October 1999.
[ Abstract ] [ Bibtex ] [ PDF ]

Books

A. Doulamis, Y. Avrithis, N. Doulamis, S. Kollias. A Genetic Algorithm for Efficient Video Content Representation. Computational Intelligence in Systems and Control, Kluwer Academic Publishers, 1999.
[ Abstract ] [ Bibtex ] [ PDF ]

Conferences

Y. Avrithis, Y. Xirouhakis, S. Kollias. Affine Invariant Representation and Classification of Object Contours for Image and Video Retrieval. In Proceedings of 3rd IMACS International Multiconference on Circuits, Systems, Communications and Computers (CSCC 1999), Athens, Greece, 1999.
[ Abstract ] [ Bibtex ] [ PDF ]
N. Doulamis, A. Doulamis, Y. Avrithis, K. Ntalianis, S. Kollias. An Optimal Framework for Summarization of Stereoscopic Video Sequences. In Proceedings of International Workshop on Synthetic - Natural Hybrid Coding and Three Dimensional Imaging (IWSNHC3DI 1999), Santorini, Greece, 1999.
[ Abstract ] [ Bibtex ] [ PDF ]
N. Doulamis, A. Doulamis, Y. Avrithis, S. Kollias. A stochastic framework for optimal key frame extraction from MPEG video databases. In Proceedings of IEEE International Workshop on Multimedia Signal Processing (MMSP 1999), Copenhagen, Denmark, 1999.
[ Abstract ] [ Bibtex ] [ PDF ]
A. Doulamis, Y. Avrithis, N. Doulamis, S. Kollias. Interactive Content-Based Retrieval in Video Databases Using Fuzzy Classification and Relevance Feedback. In Proceedings of IEEE International Conference on Multimedia Computing and Systems (ICMSC 1999), Florence, Italy, 1999.
[ Abstract ] [ Bibtex ] [ PDF ]
N. Tsapatsoulis, Y. Avrithis, S. Kollias. On the use of Radon Transform for Facial Expression Recognition. In Proceedings of 5th International Conference on Information Systems Analysis and Synthesis (ISAS 1999), Orlando, FL, USA, 1999.
[ Abstract ] [ Bibtex ] [ PDF ]

Book Chapters

Y. Avrithis, Y. Xirouhakis, S. Kollias. Affine Invariant Representation and Classification of Object Contours for Image and Video Retrieval. In Computational Intelligence and Applications, World Scientific and Engineering Society Press, pp. 342-347, July 1999.
[ Abstract ] [ Bibtex ] [ PDF ]
1998

Conferences

A. Doulamis, Y. Avrithis, N. Doulamis, S. Kollias. A Genetic Algorithm for Efficient Video Content Representation. In Proceedings of IMACS/IFAC International Symposium on Soft Computing in Engineering Applications (SOFTCOM 1998), Athens, Greece, 1998.
[ Abstract ] [ Bibtex ] [ PDF ]
Y. Avrithis, A. Doulamis, N. Doulamis, S. Kollias. An Adaptive Approach to Video Indexing and Retrieval Using Fuzzy Classification. In Proceedings of International Conference on Very Low Bitrate Video Coding (VLBV 1998), Urbana, IL, USA, 1998.
[ Abstract ] [ Bibtex ] [ PDF ]
Y. Avrithis, N. Doulamis, A. Doulamis, S. Kollias. Efficient Content Representation in MPEG Video Databases. In Proceedings of IEEE Workshop of Content-Based Access of Image and Video Libraries (CBAIVL 1998), Santa Barbara, CA, USA, 1998.
[ Abstract ] [ Bibtex ] [ PDF ]
Y. Xirouhakis, Y. Avrithis, S. Kollias. Image Retrieval and Classification Using Affine Invariant B-Spline Representation and Neural Networks. In Proceedings of IEE Colloquium on Neural Nets and Multimedia (ICNNM 1998), London, UK, 1998.
[ Abstract ] [ Bibtex ] [ PDF ]
N. Doulamis, A. Doulamis, Y. Avrithis, S. Kollias. Video Content Representation Using Optimal Extraction of Frames and Scenes. In Proceedings of IEEE International Conference on Image Processing (ICIP 1998), Chicago, IL, USA, 1998.
[ Abstract ] [ Bibtex ] [ PDF ]
1997

Conferences

Y. Avrithis, S. Kollias. Fuzzy Image Classification Using Multiresolution Neural Networks with Applications to Remote Sensing. In Proceedings of 13th International Conference on Digital Signal Processing (DSP 1997), Santorini, Greece, July 1997.
[ Abstract ] [ Bibtex ] [ PDF ]
A. Doulamis, Y. Avrithis, N. Doulamis, S. Kollias. Indexing and Retrieval of the Most Characteristic Frames / Scenes in Video Databases. In Proceedings of Workshop on Image Analysis for Multimedia Interactive Services (WIAMIS 1997), Louvain-la-Neuve, Belgium, 1997.
[ Abstract ] [ Bibtex ] [ PDF ]
1993

Conferences

Y. Avrithis, A. Delopoulos, S. Kollias. An Efficient Scheme for Invariant Optical Character Recognition Using Triple Correlations. In Proceedings of Intl. Conf. on DSP and II Intl. Conf. on Comp. Applications to Engineering Systems (CAES 1993), Nicosia, Cyprus, July 1993.
[ Abstract ] [ Bibtex ] [ PDF ]