Kostas Karpouzis

I’m currently an Associate Researcher at the Institute of Communication and Computer Systems (ICCS) of the National Technical University of Athens (NTUA) in Greece. My research interests lie in the areas of human computer interaction, emotion understanding, affective and natural interaction, serious games and games based assessment and learning. Since 1998 I have participated in fifteen research projects at Greek and European level; most notably the Humaine Network of Excellence, within which I completed my post-doc in the field of mapping signals to signs of emotion, and the FP7 TeL Siren project (Technical Manager), which was voted Best Learning Game in Europe for 2013 by the Games and Learning Alliance Network of Excellence.

I’m an elected member of the Executive Committee of the Association for the Advancement of Affective Computing (formerly Humaine Association) and the Student Activities Chair for IEEE Greece. I’m also a member of the Editorial Board for the Journal on Multimodal User Interfaces (Springer), Personal and Ubiquitous Computing (Springer) and Journal on Synthetic Emotions. Check out my list of publications (PDFs available here) and invited presentations. Google Scholar reports 1915 citations to my work, h-index=22 and i10-index=51 (May 2014). You can also find me on ResearchGate and Academia.edu.

Beyond research, I’m a regular columnist and blogger at openscience.gr, the leading Greek science communication website, a former finalist and member of the jury for Famelab Greece and member of the jury for Global Game Jam Greece. Check out my presentations on games for learning, affective computing and science communication on Slideshare or connect with me on Facebook, Twitter, or LinkedIn. If all else fails, drop me a line at kkarpou at cs dot ntua dot gr :-)

previous positions

June 04 – Dec 07: Assistant Researcher– Institute of Communication and Computer Systems, National Tech. University of Athens

June 09: Adjunct Lecturer – Department of Informatics, Univ. of Piraeus, Virtual Reality

June 07 – 08: Adjunct Lecturer – School of Electrical and Computer Engineering, National Technical University of Athens, Computer Graphics

Sept 04 – 07: Adjunct Lecturer – Department of Technology Education and Digital Systems, Univ. of Piraeus; 04-05: Digital Image Processing, e-health services; 05-07: Data mining

Sept 09 – 10: Adjunct Lecturer – Department of Informatics, Univ. of Piraeus, Virtual reality

 

 

honours and awards

 

 

12th international workshop on image analysis for multimedia interactive services (WIAMIS) - Best paper award, April 2012

Intel Ultrabook competition finalist, Intel Corp., September 2012

ECGBL Game Competition finalist

Games and Learning Alliance Network, European Learning game of the Year 2013

#4 in the ‘Great Examples’ section of the ‘Games for Impact’ list of the White House Office of Science and Technology Policy (OSTP)

 

 

book publications / journal special issues

 

 

I. Maglogiannis, K. Karpouzis, M. Wallace, “Image And Signal Processing for e‑health Applications”, ISBN: 1-598-29037-1, Morgan & Claypool Publishers, USA.

I. Maglogiannis, K. Karpouzis, M. Bramer, “Artificial Intelligence Applications and Innovations”, ISBN: 0-387-34223-0, Springer, USA.

I. Maglogiannis, K. Karpouzis, M. Wallace, “Image, Signal and Distributed Data Processing for Networked eHealth Applications”, Theme issue of the IEEE Engineering in Medicine and Biology Magazine, 2006.

K. Karpouzis, J. Soldatos, D. Tzovaras, “Emerging Multimodal Interfaces”, Special issue of the Personal and Ubiquitous Computing journal, Elsevier, 2007.

M. Bramer, K. Karpouzis, I. Maglogiannis, “Artificial Intelligence Applications and Innovations”, Special issue of the International Journal of Applied Intelligence journal, Springer, 2007.

M. Bramer, K. Karpouzis, I. Maglogiannis, “Artificial Intelligence Applications and Innovations”, Springer, ISBN: 978-0-387-34223-8, 2006.

I. Maglogiannis, K. Karpouzis, M. Wallace, J. Soldatos, “Emerging Artificial Intelligence Applications in Computer Engineering”, Series in Frontiers in Artificial Intelligence and Applications, IOS Press, 2007.

C. Pelachaud, J.-C. Martin, E. André, G. Chollet, K. Karpouzis, D. Pelé (Eds.): Intelligent Virtual Agents, 7th International Conference, IVA 2007, Paris, France, September 17-19, 2007, Proceedings. Lecture Notes in Computer Science 4722 Springer 2007, ISBN 978-3-540-74996-7

K. Karpouzis, E. Andre, A. Batliner, “Emotion-Aware Natural Interaction”, Special issue of the Advances in Human-Computer Interaction journal, Hindawi 2009.

G. Castellano, K. Karpouzis, C. Peters, J.-C. Martin, “Real-Time Affect Analysis and Interpretation”, Special issue of the Journal of Multimodal User Interfaces, Springer, 2009.

G. Castellano, K. Karpouzis, J.-C. Martin, LP Morency, C. Peters, L. Riek, “Affective Interaction in Natural Environments”, Special issue of the ACM Transactions on Interactive Intelligent Systems, ACM Press, 2011.

C. Peter, K. Karpouzis, “Affect and Behaviour Related Assistance in Support for the Elderly”, Special issue of the Journal of Multimodal User Interfaces, Springer, 2012.

K. Karpouzis, G. Castellano, R. Khaled, L. Dimaraki, “Games for Learning”, Interaction Design and Architecture(s) Journal (IxD&A), 2014.

G. Yannakakis, K. Isbister, A. Paiva, K. Karpouzis, “Emotion in Games”, Special issue of the IEEE Transactions on Affective Computing, IEEE Press, 2014.

 

research and development projects 

 

2001 – 04 IST “ERMIS, Emotionally Rich Man-machine Interaction Systems”

2002 – 03 IST “PISTE, Personalized, Immersive Sports TV Experience”

2003 – 05 IST “MELISA”, Multiplatform e-Publishing for Leisure and Interactive Sports Advertising”

2004 – 07 FP6 NoE “Humaine”, Network of Excellence in Emotion-oriented Computing

2006 – 10 FP6 IP “CALLAS”, Conveying Affectiveness in Leading-edge Living Adaptive  Systems

2006 – 09 FP6 STREP “Feelix Growing”, FEEL, Interact, eXpress: a Global appRoach to develOpment With INterdisciplinary Grounding

2006 – 09 FP6 STREP “AGENT-DYSL”, Accommodative Intelligent Educational Environments for Dyslexic Learners

2010 – 13 FP7 STREP TeL “Siren”, Social games for conflIct REsolution based on natural iNteraction, Technical manager

2012 ERA “Reviving the Ancient Agora, the cradle of the Democracy”, American School of Classical Studies at Athens

2012 – 15 Thales project “Interdisciplinary Research in Affective Computing for Biological Activity Recognition in Assistive Environments”

2012 – 15 FP7 STREP TeL “ILearnRW”, Integrated Intelligent Learning Environment for Reading and Writing

2012 FP7 People CA “Science Night Out”, Researchers’ night 2012

2012 – 15 LLP Comenius “Le-MATH: Learning Mathematics through new communication factors”

2013 – 15 FP7 NoE GALA “Games and Learning Alliance”, associate member

2013 – 15 CARE: a Sentient Context-Aware Recommender system for the Elderly

2013 – 14 GSRT PYXIS: High level operational awareness in urgent situations using smart spaces and augmented reality technologies

participation in technical forums

 

 

1998 – Technical Chamber of Greece (TEE)

2003 – National Representative in the IFIP Working Group 12.5 “Artificial Intelligence Applications” & “Informatics and ICT in Higher Education”

2005 Proposal evaluator – Greek Secretariat of Research and Technology

2009 Member of the Technical Committee on e-learning and vocational learning of the Technical Chamber of Greece

2012 Proposal evaluator for Dutch and Portuguese research projects; 

2012 Project evaluator for Greek (GSRT) SME Innovation projects

 

 

journal articles  

 

 

[J37] S. Asteriadis, K. Karpouzis, S. Kollias, "Visual Focus of Attention in Non-calibrated Environments using Gaze Estimation", International Journal of Computer Vision, Springer, 01/2014; DOI:10.1007/s11263-013-0691-3

[J36] K. Karpouzis, G. Caridakis, R. Cowie, E. Douglas-Cowie, "Induction, recording and recognition of natural emotions from facial expressions and speech prosody", Special Issue on Pervasive Assistance, Journal on Multimodal User Interfaces, Springer-Verlag, pp. 1-12, 10.1007/s12193-013-0122-3.

[J35] G. Goudelis, K. Karpouzis, S. Kollias, "Exploring trace transform for robust human action recognition", Pattern Recognition, Elsevier, http://dx.doi.org/10.1016/j.patcog.2013.06.006

[J34] N. Shaker, S. Asteriadis, G. Yannakakis, K. Karpouzis, "Fusing Visual and Behavioral Cues for Modeling User Experience in Games", IEEE Transactions on Cybernetics, Vol. 43, No. 6, December 2013, pp. 1519-1531.

[J33] S. Asteriadis, K. Karpouzis, N. Shaker, G. Yannakakis, "Towards Detecting Clusters of Players using Visual and Game-play Behavioral Cues", Procedia Computer Science, Special issue on Virtual Worlds for Serious Applications, Volume 15, pp. 140-147 (2012).

[J32] G. Caridakis, K. Karpouzis, A. Drosopoulos, S. Kollias, "Non parametric, self organizing, scalable modeling of spatiotemporal inputs: The Sign Language Paradigm", Neural Networks, Elsevier, Volume 36, December, 2012, pp. 157-166.

[J31] G. Caridakis, J. Wagner, A. Raouzaiou, F. Lingenfelser, K. Karpouzis, E. Andre, "A cross-cultural, multimodal, affective corpus for gesture expressivity analysis", Journal on Multimodal User Interfaces, Springer, Special Issue on Multimodal Corpora, March 2013, Volume 7, Issue 1-2, pp 121-134.

[J30] G. Caridakis, S. Asteriadis, K. Karpouzis, "Non-manual cues in automatic sign language recognition", Special Issue on Assistive Environments for the Disabled and the Senior Citizens, Personal and Ubiquitous Computing, Springer, 10.1007/s00779-012-0615-1.

[J29] G. Caridakis, K. Karpouzis, M. Wallace, L. Kessous, N. Amir, "Multimodal user's affective state analysis in naturalistic interaction", Journal on Multimodal User Interfaces, Springer, Volume 3, Numbers 1-2 / March, 2010, pp 49-66.

[J28] G. Caridakis, K. Karpouzis, A. Drosopoulos, S. Kollias, "Self Organizing Markov Map for gesture recognition", Pattern Recognition Letters, Volume 31, Issue 1, 2010, Pages 52-59.

[J27] K. Karpouzis, I. Maglogiannis, "Modeling and delivering heterogeneous audiovisual content for group consumption", Signal, Image and Video Processing, Elsevier, Volume 4, Number 2 / June, pp. 155-165, 2010.

[J26] 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", Multimedia Tools and Applications, Springer, Volume 41, Number 3 / February, 2009, pp. 469-493.

[J25] G. Caridakis, K. Karpouzis, S. Kollias, "User and Context Adaptive Neural Networks for Emotion Recognition", Neurocomputing, Vol. 71, Iss. 13-15, Aug. 2008, pp. 2553-2562, Elsevier.

[J24] G. Caridakis, A. Raouzaiou, E. Bevacqua, M. Mancini, K. Karpouzis, L. Malatesta and C. Pelachaud, "Virtual agent multimodal mimicry of humans", Language Resources and Evaluation,  41 (3-4), Special issue on Multimodal Corpora, May 2008, pp. 367-388, Springer.

[J23] S. Ioannou, G. Caridakis, K. Karpouzis, S. Kollias, "Robust Feature Detection for Facial Expression Recognition", EURASIP Journal on Image and Video Processing, Special issue on "Facial Image Processing", Hindawi Publishing Corporation, vol. 2007, Article ID 29081, 22 pages, doi:10.1155/2007/29081.

[J22] M. Wallace, S. Ioannou, K. Karpouzis, S. Kollias, "Possibilistic Rule Evaluation: A case study in facial expression analysis", International Journal of Fuzzy Systems, Vol 8(4), pp. 219-223, December 2006.

[J21] L. Malatesta, A. Raouzaiou, K. Karpouzis, "Towards modeling embodied conversational agent character profiles using appraisal theory predictions in expression synthesis", Applied Intelligence, Springer, Volume 30, Number 1 / February, 2009, pp. 58-64.

[J20] J.-C. Martin, G. Caridakis, L. Devillers, K. Karpouzis, S. Abrilian, "Manual Annotation and Image Processing of Multimodal Emotional Behaviors in TV Interviews", Personal and Ubiquitous Computing, Special issue on Emerging Multimodal Interfaces, Volume 13, Number 1 / January, 2009, pp. 69-76.

[J19] S.-E. Fotinea, E. Efthimiou, K. Karpouzis, G. Caridakis, "A Knowledge-based Sign Synthesis Architecture", Universal Access in the Information Society 6 (4), pp. 405-418, Springer, 2008.

[J18] L. Malatesta, A. Raouzaiou, K. Karpouzis, "MPEG-4 Facial Expression Synthesis based on Appraisal Theory", Personal and Ubiquitous Computing, Special issue on Emerging Multimodal Interfaces, Volume 13, Number 1 / January, 2009, pp. 77-83.

[J17] A. Garcia-Rojas, F. Vexo, D. Thalmann, A. Raouzaiou, K. Karpouzis, S. Kollias, L. Moc-cozet, N. Magnenat-Thalmann, "Emotional Face Expression Profiles Supported by Virtual Human Ontology", Computer Animation and Virtual Worlds, vol. 17, num. 3-4, 2006, pp. 259-269, John Wiley & Sons.

[J16] T. Athanasiadis, M. Wallace, K. Karpouzis, Y. Nikolakopoulos, S. Kollias, "Utilization of evidence theory in the detection of salient regions in successive CT images", International Journal of Oncology, Special issue on Computational Analysis and Decision Support Systems in Oncology, pp. 1071-1076, Vol. 15, 969-1108, 2006.

[J15] M. Wallace, S. Ioannou, A. Raouzaiou, K. Karpouzis, S. Kollias, "Dealing with Feature Uncertainty in Facial Expression Recognition Using Possibilistic Fuzzy Rule Evaluation", Intl J. of Intelligent Systems Technologies and Applications, Special issue on "Intelligent Image and Video Processing and Applications: The Role of Uncertainty", pp. 409-429, Vol. 1, Nos. 3/4, 2006.

[J14] S. Ioannou, A. Raouzaiou, V. Tzouvaras, T. Maillis, K. Karpouzis, S. Kollias, "Emotion recognition through facial expression analysis based on a neurofuzzy network", Special Issue on Emotion: Understanding & Recognition, Neural Networks, Elsevier, Volume 18, Issue 4, May 2005, Pages 423-435.

[J13] K. Karpouzis, I. Maglogiannis, E. Papaioannou, D. Vergados, A. Rouskas, "Integrating Heterogeneous Multimedia Content for Personalized Interactive Entertainment using MPEG-21", Special issue on Emerging Middleware for Next Generation Networks, Computer Communications, Elsevier, Vol. 30 (3), pp. 592-607, 2007.

[J12] K. Karpouzis, G. Caridakis, S-E. Fotinea, E. Efthimiou, "Educational Resources and Implementation of a Greek Sign Language Synthesis Architecture", Computers & Education, Special Issue in Web3D Technologies in Learning, Education and Training, Elsevier, Vol. 49, Iss. 1, pp. 54-74, August 2007.

[J11] G. Caridakis, K. Karpouzis, "Design and Implementation of a Greek Sign Language Synthesis System", WSEAS Transactions on Systems, Issue 10, Volume 3, pp. 3108 - 3113, Dec. 2004.

[J10] M. Wallace, K. Karpouzis, M. Stefanou, I. Maglogiannis, S. Kollias, "Electronic Roads in Historical Documents: a Student-oriented Approach", Education and Information Technologies 9(3), Kluwer Academic Publishers, pp. 271-289, 2004.

[J09]  M. Wallace, I. Maglogiannis, K. Karpouzis, G. Kormentzas, S. Kollias, "Intelligent One-Stop-Shop Travel Recommendations Using an Adaptive Neural Network and Clustering of History", Information Technology & Tourism, 6 (3), pp. 181-193, 2004.

[J08]  I. Maglogiannis, C. Bourletidis, K. Karpouzis, P. Petrakis, "Implementation of Distance Learning based on Synchronous Collaboration Methodology for Dispersed Public Organizations", IEEE Learning Technology, Volume 5, Issue 3, July 2003.

[J07]  M. Wallace, K. Karpouzis, G. Stamou, St. Kollias, G. Moschovitis, Ch. Schizas, "The Electronic Road: Personalised Content Browsing", IEEE Multimedia, October - December 2003.

[J06]  A. Raouzaiou, N. Tsapatsoulis, K. Karpouzis, St. Kollias, "Parameterized Facial Expression Synthesis Based on MPEG-4", EURASIP Journal on Applied Signal Processing, Special Issue on Signal Processing for 3D Imaging and Virtual Reality, Vol. 2002, No 10, pp. 1021-1038, 2002.

[J05]  K. Karpouzis, G. Moschovitis, K. Ntalianis, S. Ioannou, St. Kollias, "Web Access To Large Audiovisual Assets Based On User Preferences", Multimedia Tools and Applications, vol. 22, no. 3, pp. 215-234, Kluwer Academic Publishers, March 2004.

[J04]  K. Karpouzis, N. Tsapatsoulis, A. Raouzaiou, G. Moschovitis, St. Kollias, "Enhancing Nonverbal Human Computer Interaction with Expression Recognition", ACM SIGCAPH Bulletin, pp. 1 9, Jun/Jul 2000, ACM Press, New York, NY, 2000.

[J03]  K. Karpouzis, S. Tzavidas, St. Kollias, "Parametric Representation of Basic Human Locomotion", Journal of System Analysis, Modeling and Simulation: Analysis and Control of Technological Systems, Vol. 38 (2), pp. 281 - 293, Gordon and Breach Science Publishers, Inc., 2000.

[J02]  K. Karpouzis, St. Kollias, "The rendering pipeline in the classroom: a diversified approach", ACM SIGCSE Bulletin, Volume 30, Issue 3, pp. 139 - 142, ACM Press, NY, 1999.

[J01]  K. Karpouzis, G. Votsis, N. Tsapatsoulis, St. Kollias, "Compact 3D Model Generation based on 2D Views of Human Faces: Application to Face Recognition", Machine Graphics and Vision, vol. 7, Nos. 1/2, pp. 75-85, 1998.

 

 

book chapters

 

 

[B22]R. Cowie, C. Cox, J.-C. Martin, A. Batliner, D. Heylen, K. Karpouzis, “Issues in Data Labelling”, P. Petta et al. (eds.), Emotion-Oriented Systems, Cognitive Technologies, DOI 10.1007/978-3-642-15184-2_5, Springer-Verlag Berlin Heidelberg 2011.

[B21]K. Karpouzis, “Signals to Signs – Feature Extraction, Recognition, and Multimodal Fusion”, P. Petta et al. (eds.), Emotion-Oriented Systems, Cognitive Technologies, pp. 65-69, Springer.

[B20]K. Karpouzis, “Signals to Signs – Feature Extraction, Recognition, and Multimodal Fusion”, P. Petta et al. (eds.), Emotion-Oriented Systems, Cognitive Technologies, pp. 65-69, Springer.

[B19]G. Castellano, G. Caridakis, A. Camurri, K. Karpouzis, G. Volpe, S. Kollias, “Body gesture and facial expression analysis for automatic affect recognition”, in Scherer, K.R., Banziger, T., Roesch, E. (Eds.), A Blueprint for Affective Computing, pp. 245-255, Oxford University Press.

[B18]C. Peters, G. Castellano, M. Rehm, E. André, A. Raouzaiou, K. Rapantzikos, K. Karpouzis, G. Volpe, A. Camurri, A. Vasalou, “Fundamentals of Agent Perception and Attention Modelling”, Emotion-Oriented Systems, Cognitive Technologies, Springer-Verlag, Part 4, 293-319, 2011.

[B17]M. Pantic, G. Caridakis, E. Andre, J. Kim, K. Karpouzis, S. Kollias, “Multimodal emotion recognition from low-level cues”, in P. Petta, R. Cowie, C. Pelachaud (eds), The HUMAINE Handbook on Emotion-Oriented Systems Technologies, pp. 115-132, Springer, 2011.

[B16]G. Caridakis, P. Tzouveli, L. Malatesta, A. Raouzaiou, K. Karpouzis, S. Kollias, “Affective e-Learning System: Analysis of Learners State”, in A. Tzanavari and N. Tsapatsoulis (eds), Affective, Interactive and Cognitive Methods for E-Learning Design: Creating an Optimal Education Experience, pp. 275-294, IGI Global.

[B15]C. Doukas, I. Maglogiannis, K. Karpouzis, “Introducing Context-Awareness and Adaptation in Telemedicine Systems”, in Wallace, M., Anagnostopoulos, I.E., Mylonas, P., Bielikova, M. (Eds.), Semantics in Adaptive and Personalized Services, Methods, Tools and Applications, pp. 163–185, 2010.

[B14]L. Malatesta, K. Karpouzis, A. Raouzaiou, “Affective Intelligence: The Human Face of AI”, in M. Bramer (Ed.) Artificial Intelligence: An International Perspective, IFIP State of the Art Series, Springer, pp. 53-70.

[B13]L. Malatesta, J. Murray, A. Raouzaiou, A. Hiolle, L. Canamero, K. Karpouzis, “Emotion Modelling and Facial Affect Recognition in Human-Computer and Human-Robot Interaction”, in J. Ponce, A. Karahoca (Eds.), State of the Art in Face Recognition, pp. 231 – 250, In Tech Publ., Vienna.

[B12]Ph. Mylonas, G. Andreou, K. Karpouzis, “A Collaborative Filtering Approach to Personalized Interactive Entertainment using MPEG-21”, Emerging Artificial Intelligence Applications in Computer Engineering, Frontiers in Artificial Intelligence and Applications, vol. 160, IOS Press, Amsterdam, October 2007.

[B11]R. Cowie, E. Douglas-Cowie, K. Karpouzis, G. Caridakis, M. Wallace, S. Kollias, “Recognition of Emotional States in Natural Human-Computer Interaction”, in D. Tzovaras (ed.), Multimodal User Interfaces, pp. 119-153, Springer Berlin Heidelberg, 2008.

[B10]K. Karpouzis, S. Kollias, “Facial Animation and Affective Human-Computer Interaction”, B. Furht (ed.), Encyclopedia of Multimedia, pp. 246-251, Springer US, 2006.

[B09] K. Karpouzis, “Signals to Signs: Feature extraction, recognition and multimodal fusion”, in P. Petta, R. Cowie, C. Pelachaud (eds), The HUMAINE Handbook on Emotion-Oriented Systems Technologies, Springer, in press.

[B08] G. Castellano, G. Caridakis, A. Camurri, K. Karpouzis, G. Volpe, S. Kollias, “Body gesture and facial expression analysis for automatic affect recognition”, in K. Scherer, T. Baenziger, E. Roesch (eds.), A blueprint for an affectively competent agent, Oxford University Press, in print.

[B07] K. Karpouzis, G. Caridakis, L. Kessous, N. Amir,A. Raouzaiou, L. Malatesta, S. Kollias, “Modeling naturalistic affective states via facial, vocal, and bodily expressions recognition”, T. Huang, A. Nijholt, M. Pantic, A. Pentland (eds.), Lecture Notes in Artificial Intelligence 4451, Special Volume on AI for Human Computing, 2007, Springer.

[B06] I. Maglogiannis, K. Karpouzis, “Combining Synchronous and Asynchronous Distance Learning for Adult Traininng in Military Environments: A case study implementation for the Greek Army”, S. Mishra (ed.), Global Cases in E-Learning Practices: Successes and Pitfalls, pp. 22-34, Idea Group Publishers, 2006.

[B05] K. Karpouzis, A. Drosopoulos, S. Ioannou, A. Raouzaiou, N. Tsapatsoulis, S. Kollias, “Facial and Body Feature Extraction for Emotionally-Rich HCI”, in Mehdi Khosrow-Pour (ed.), Encyclopedia of Information Science and Technology, Idea Group Publishers, pp. 1180 - 1185.

[B04] K. Karpouzis, A. Raouzaiou, A. Drosopoulos, S. Ioannou, T. Balomenos, N. Tsapatsoulis and S. Kollias, “Facial expression and gesture analysis for emotionally-rich man-machine interaction”, in N. Sarris, M. Strintzis, (eds.), 3D Modeling and Animation: Synthesis and Analysis Techniques, Idea Group Publishers, 2003.

[B03] K. Karpouzis, A. Raouzaiou, St. Kollias, ““Moving” avatars: emotion synthesis in virtual worlds”, in C. Stephanidis, J. Jacko (eds.), Human – Computer Interaction: Theory and Practice, vol. 2, pp. 503 – 507, Lawrence Erlbaum Associates, Inc., 2003.

[B02] A. Drosopoulos, Th. Balomenos, K. Karpouzis, St. Kollias, “Emotionally-rich Man-machine Interaction Based on Gesture Analysis”, in C. Stephanidis (ed.), Universal Access in HCI: Inclusive Design in the Information Society, vol. 4, pp. 1372 –1376, Lawrence Erlbaum Associates, Inc., 2003.

[B01]  K. Karpouzis, G. Votsis, G. Moschovitis, St. Kollias, “Emotion Recognition Using Feature Extraction and 3–D Models”, Computational Intelligence and Applications, World Scientific and Engineering Academy and Society Press, pp. 348 – 353, 1999.

 

 

conference papers

 

 

[C101] C. Hondrou, E. Tsalapati, A. Raouzaiou, K. Karpouzis, S. Kollias, "Player-Specific Conflict Handling Ontology", Games and Learning Alliance conf. (GALA 2013), Paris, 23-25 Oct. 2013.

[C100] S. Gourgari, G. Goudelis, K. Karpouzis, S. Kollias, "THETIS: THree Dimensional Tennis Shots - A human action dataset", IEEE Workshop on Behaviour Analysis in Games and modern Sensing devices, CVPR 2013, Portland, Oregon, June 2013.

[C99]K. Karpouzis, G. Yannakakis, A. Paiva, J. Herlev Nielsen, A. Vasalou, A. Jhala, "User modelling and adaptive, natural interaction for conflict resolution", workshop on Game based learning for the 21st century: challenges and opportunities, IEEE ICALT 2012, Rome, Italy.

[C98]S. Asteriadis, N. Shaker, K. Karpouzis, G. N. Yannakakis, "Towards Player’s Affective and Behavioral Visual Cues as drives to Game Adaptation", LREC Workshop on Multimodal Corpora for Machine Learning, Istanbul, May, 2012

[C97]S. Asteriadis, K. Karpouzis, N. Shaker, G. Yannakakis, "Towards Detecting Clusters of Players using Visual and Game-play Behavioral Cues", 4th International Conference on Games and Virtual Worlds for Serious Applications (VS-GAMES’12) 29-30-31 October, 2012 Genoa, Italy

[C96]S. Asteriadis, G. Caridakis, L. Malatesta, K. Karpouzis, "Natural interaction multimodal analysis: Expressivity analysis towards adaptive and personalized interfaces", 7th International Workshop on Semantic and Social Media Adaptation and Personalization, SMAP, Luxemburg, December 2012

[C95]S. Asteriadis, K. Karpouzis, N. Shaker, G. N. Yannakakis, "Does your profile say it all? Using demographics to predict expressive head movement during gameplay", 20th conference on User Modeling, Adaptation, and Personalization (UMAP 2012), Workshop on TV and multimedia personalization, Montreal, Canada, 16-20 July, 2012

[C94]C. Grappiolo, G. Yannakakis, S. Asteriadis, K. Karpouzis, "Towards Multimodal Player Adaptivity in a Serious Game for Fair Resource Distribution", IEEE International Conference on Multimedia and Expo (ICME), Barcelona, Spain.

[C93]S. Asteriadis, K. Karpouzis, S. Kollias, "The importance of eye gaze and head pose to estimating levels of attention", 3rd International Conference in Games and Virtual Worlds for Serious Applications (VS-Games), May 4-6 2011, Athens, Greece.

[C92]S. Asteriadis, K. Karpouzis, S. Kollias, "Robust Validation of Visual Focus of Attention using Adaptive Fusion of Head and Eye Gaze patterns", 6th IEEE Workshop on Human Computer Interaction: Real-Time Vision Aspects of Natural User Interfaces, in conjunction with ICCV 2011, 6-13 November, Barcelona, Spain.

[C91]G. Goudelis, K. Karpouzis, S. Kollias, "Robust Human Action Recognition Using History Trace Templates", 12th International Workshop on Image Analysis for Multimedia Interactive Services (WIAMIS), Delft, The Netherlands, 13-15 April.

[C90]G. Caridakis, K. Karpouzis, "Non verbal behavior analysis in gaming and game based learning", 5th European Conference on Games Based Learning, 20-21 October 2011, Athens, Greece.

[C89]G. Caridakis, S. Asteriadis, K. Karpouzis, "Non-manual cues in automatic sign language recognition", ABRA: Affect and Behaviour Related Assistance Workshop, 4th ACM International PETRA Conference, Crete, Greece, May 25-27

[C88]G. Caridakis, K. Karpouzis, S. Asteriadis, "Low-cost affect and behaviour sensing in games", Fourth EUCogII Members Conference, Poster session, Thessaloniki, Greece, April 11-12

[C87]G. Caridakis, K. Karpouzis, "Full body expressivity analysis in 3D Natural Interaction: a comparative study", Affective Interaction in Natural Environments workshop, ICMI 2011 International Conference on Multimodal Interaction. 14-18th November 2011, Alicante, Spain

[C86]G. Caridakis, S. Asteriadis, K. Karpouzis, S. Kollias, "Detecting Human Behavior Emotional Cues in Natural Interaction", 17th International Conference on Digital Signal Processing (DSP), Corfu, Greece, July 6-8

[C85]N. Shaker, S. Asteriadis, G. Yannakakis, K. Karpouzis, "A Game-based Corpus for Analysing the Interplay between Game Context and Player Experience", EmoGames workshop, International Conference on Affective Computing and Intelligent Interaction (ACII2011), October 9, Memphis, USA.

[C84]G. Caridakis, S. Asteriadis, K. Karpouzis, "User modeling via gesture and head pose expressivity features", 5th International Workshop on Semantic Media Adaptation and Personalization, (SMAP 2010), Limassol, Cyprus, 9-10 December 2010.

[C83]G. Yannakakis, J. Togelius, R. Khaled, A. Jhala, K. Karpouzis, A. Paiva, A. Vasalou, "Siren: Towards Adaptive Serious Games for Teaching Conflict Resolution", 4th European Conference on Games Based Learning (ECGBL10), Copenhagen, Denmark, 21-22 October 2010.

[C82]S. Asteriadis, K. Karpouzis, S. Kollias, "Head Pose Estimation with One Camera, in Uncalibrated Environments", International Workshop on Eye Gaze in Intelligent Human Machine Interaction, IUI 2010.

[C81]S. Asteriadis, K. Karpouzis, S. Kollias, "Face Tracking and Head Pose Estimation using Convolutional Neural Networks", Proceedings of the ACM/SSPNET 2nd International Symposium on Facial Analysis and Animation, Edinburgh 2010.

[C80]G. Caridakis, J. Wagner, A. Raouzaiou, Z. Curto, E. Andre, K. Karpouzis, "A multimodal corpus for gesture expressivity analysis", Multimodal Corpora: Advances in Capturing, Coding and Analyzing Multimodality, LREC, Malta, May 17-23, 2010.

[C79]S. Asteriadis, D. Soufleros, K. Karpouzis, S. Kollias, ”A Natural Head Pose and Eye Gaze Dataset”, International Conference on Multimodal Interfaces (ICMI 2009), November 2-6, Boston, MA.

[C78]G. Caridakis, K. Karpouzis, N. Drosopoulos, S. Kollias, “Adaptive gesture recognition in Human Computer Interaction”, International Workshop on Image Analysis for Multimedia Interactive Services (WIAMIS), London, UK, 2009.

[C77]L. Malatesta, A. Raouzaiou, L. Pearce, K. Karpouzis, “Affective Interface Adaptations in the Musickiosk Interactive Entertainment Application”, INTETAIN 09, Amsterdam, June 22-24.

[C76]Σ. Χονδρού, Μ. Περτσελάκης, Γ. Καρυδάκης, Κ. Καρπούζης, Σ. Κόλλιας, “Ανάλυση ευαισθησίας σε αναδρομικό νευρωνικό δίκτυο εκπαιδευμένο για αναγνώριση συναισθήματος”, 3ο Πανελλήνιο Συνέδριο Φοιτητών Ηλεκτρολόγων Μηχανικών και Μηχανικών Υπολογιστών, 2009.

[C75]S. Fotinea, E. Efthimiou, G. Caridakis, O. Diamanti, N. Mitsou, K. Karpouzis, C. Tzafestas, P. Maragos, “DIANOEMA: Visual analysis and sign recognition for GSL modelling and robot teleoperation”, 8th International Gesture Workshop, GW2009, Bielefeld University, Germany.

[C74]S. Asteriadis, K. Karpouzis, S. Kollias, “Feature Extraction and Selection for inferring user engagement in an HCI environment”, HCI International, San Diego, CA, 19-24 July 2009.

[C73]S. Asteriadis, P. Tzouveli, K. Karpouzis, S. Kollias, “A non-intrusive method for user focus of attention estimation in front of a computer monitor”, IEEE Conference on Automatic Face and Gesture Recognition (FG 2008), Amsterdam, The Netherlands.

[C72]S. Asteriadis, K. Karpouzis, S. Kollias, “A Neuro-Fuzzy approach to User Attention”, 18th International Conference on Artificial Neural Networks (ICANN), Prague, 3-6 September 2008.

[C71]G. Caridakis, O. Diamanti, K. Karpouzis, P. Maragos, “Automatic Sign Language Recognition: vision based feature extraction and probabilistic recognition scheme from multiple cues”, 1st ACM International Conference on PErvasive Technologies Related to Assistive Environments (PETRA), July 15-19, Athens, Greece.

[C70]G. Caridakis, K. Karpouzis, C. Pateritsas, A. Drosopoulos, A. Stafylopatis, S. Kollias, “Hand Trajectory-based Gesture Recognition using Self-Organizing Feature Maps and Markov Models”, 2008 IEEE International Conference on Multimedia & Expo (ICME), June 23-26, Hannover, Germany.

[C69]L. Malatesta, A. Raouzaiou, K. Karpouzis and S. Kollias, “Shared virtual training in an affect-sensitive environment”, CHI2008, Workshop on Exertion Interfaces-Florence, Italy.

[C68]C. Peters, S. Asteriadis, K. Karpouzis, E. de Sevin, “Towards a real-time gaze-based Shared Attention for a virtual agent”, International Conference on Multimodal Interfaces (ICMI), Workshop on Affective Interaction in Natural Environments (AFFINE), Chania, Crete, Oct. 2008.

[C67]M. Schroeder, I. Wilson, W. Jarrold, D. Evans, C. Pelachaud, E. Zovato, K. Karpouzis, “What is most important for an Emotion Markup Language?”, Proc. Third Workshop Emotion and Computing, KI 2008, Kaiserslautern, Germany, September, 2008.

[C66]E. Douglas-Cowie, R. Cowie, I. Sneddon, C. Cox, O. Lowry, M. McRorie, J.-C. Martin, L. Devillers, S. Abrilian, A. Batliner, N. Amir, K. Karpouzis, “The HUMAINE Database: Addressing the Collection and Annotation of Naturalistic and Induced Emotional Data”, Proc. 2nd Int. Conference on Affective Computing and Intelligent Interaction (ACII'2007), Lisbon, Portugal.

[C65]S. Asteriadis, P. Tzouveli, K. Karpouzis, S. Kollias, “Non-verbal feedback on user interest based on gaze direction and head pose”, 2nd International Workshop on Semantic Media Adaptation and Personalization (SMAP 2007), London, United Kingdom, 17-18 December 2007.

[C64]M. Schroeder, L. Devillers, K. Karpouzis, J.-C. Martin, C. Pelachaud, C. Peter, H. Pirker, B. Schuller, J. Tao, and I. Wilson, "What should a generic emotion markup language be able to represent?", Proc. 2nd Int. Conference on Affective Computing and Intelligent Interaction (ACII'2007), Portugal.

[C63]L. Malatesta, G. Caridakis, A. Raouzaiou, K. Karpouzis, "Agent Personality Traits in Virtual Environments Based on Appraisal Theory Predictions", AISB'07: Artificial and Ambient Intelligence, Language, Speech and Gesture for Expressive Characters, Newcastle upon Tyne, UK, April 2-4, 2007.

[C62] G. Andreou, Ph. Mylonas and K. Karpouzis, "A collaborative filtering approach to personalized interactive entertainment using MPEG-21", 3rd International Conference on Web Information Systems and Technologies (WEBIST 2007), Barcelona, Spain, 3-7 March 2007.

[C61] G. Caridakis, L. Malatesta, L. Kessous, N. Amir, A. Raouzaiou, K. Karpouzis, "Modeling naturalistic affective states via facial and vocal expressions recognition", International Conference on Multimodal Interfaces (ICMI’06), Banff, Alberta, Canada, November 2-4, 2006.

[C60] C. Pelachaud, E. Bevacqua, G. Caridakis, K. Karpouzis, M. Mancini, C. Peters, A. Raouzaiou, “Mimicking from Perception and Interpretation”, Enactive 2006 Conference, Montpellier, France, November 20-21, 2006.

[C59] J.-C. Martin, G. Caridakis, L. Devillers, K. Karpouzis, S. Abrilian, “Manual Annotation and Image Processing of Multimodal Emotional Behaviors in TV Interviews”, I. Maglogiannis, K. Karpouzis, M. Bramer (Eds.), Artificial Intelligence Applications and Innovations – AIAI 2006, pp. 369-377, Springer, 2006.

[C58] A. Garcia-Rojas, F. Vexo, D. Thalmann, A. Raouzaiou, K. Karpouzis, S. Kollias, L. Moccozet, N. Magnenat-Thalmann, “Emotional Face Expression Profiles Supported by Virtual Human Ontology”, Computer Animation and Social Agents (CASA) 2006, Geneva, July 2006.

[C57] A. Garcia-Rojas, F. Vexo, D. Thalmann, A. Raouzaiou, K. Karpouzis, S. Kollias, “Emotional Body Expression Parameters in Virtual Human Ontology”, 1st Int. Workshop on Shapes and Semantics, Matsushima, Japan, June 2006.

[C56] S. Ioannou, L. Kessous, G. Caridakis, K. Karpouzis, V. Aharonson, S. Kollias, “Adaptive On-Line Neural Network Retraining for Real Life Multimodal Emotion Recognition”, ICANN 2006, LNCS Vol. 4131, pp. 81-92, Springer-Verlag, 2006.

[C55] A. Raouzaiou, C. Peters, E. Bevacqua, G. Caridakis, K. Karpouzis, M. Mancini, C. Pelachaud, “Multimodal feedback using virtual agents”, Perception and Interactive Technologies, Kloster Irsee, Germany, June 19 - 21, 2006.

[C54] G. Caridakis, A. Raouzaiou, K. Karpouzis, S. Kollias, “Synthesizing Gesture Expressivity Based on Real Sequences”, Workshop on multimodal corpora: from multimodal behavior theories to usable models, LREC 2006 Conference, Genoa, Italy, 24-26 May.

[C53] J.-C. Martin, G. Caridakis, L. Devillers, K. Karpouzis, S. Abrilian, “Manual Annotation and Image Processing of Multimodal Emotional Behaviours in TV Interviews”, 5th Conference on Language Resources and Evaluation (LREC 2006), Genoa, Italy, May 2006.

[C52] S. Ioannou, M. Wallace, K. Karpouzis and S. Kollias, “A Robust Scheme for Facial Analysis and Expression Recognition”, Measuring Behavior 2005, 5th International Conference on Methods and Techniques in Behavioral Research, Wagenigen, The Netherlands, Sept. 2005.

[C51] S. Ioannou, M. Wallace, K. Karpouzis, A. Raouzaiou and S. Kollias, “Confidence-Based Fusion of Multiple Feature Cues for Facial Expression Recognition”, FUZZ-IEEE 2005, May 22-25, Reno, Nevada, USA.

[C50] M. Mancini, B. Hartmann, C. Pelachaud, A. Raouzaiou, K. Karpouzis, “Expressive Avatars in MPEG-4”, IEEE International Conference on Multimedia & Expo (ICME) 2005, July 6-8, Amsterdam, The Netherlands.

[C49] A. Raouzaiou, E. Spyrou, K. Karpouzis and S. Kollias, “An Intermediate Expressions’ Generator System in the MPEG-4 Framework”, L. Atzori, D. Giusto, R. Leonardi, F. Pereira. (Eds.): Visual Content Processing and Representation 2005 – VLBV05, LNCS 3893, pp. 129 – 136, Springer-Verlag, 2006.

[C48] S. Ioannou, M. Wallace, K. Karpouzis, A. Raouzaiou and S. Kollias, “Combination of Multiple Extraction Algorithms in the Detection of Facial Features”, Proceedings of the IEEE International Conference on Image Processing (ICIP), Genova, Italy, September 2005.

[C47] M. Papaioannou, K. Pardalis, K. Karpouzis, G. Andreou, N. Ioannidis, "Possible usages of MPEG-21 to improve the MELISA sports broadcasting system", ISO/IEC JTC1/SC29/WG11/M11675, 71st MPEG meeting, Hong Kong, China, January 2005.

[C46] S. E. Fotinea, E. Efthimiou, K. Karpouzis, G. Caridakis, "Dynamic GSL synthesis to support access to e-content", HCI International 2005, July 2005, Las Vegas, Nevada, USA.

[C45] S. Ioannou, M. Wallace, K. Karpouzis, A. Raouzaiou and S. Kollias, "Confidence-Based Fusion of Multiple Feature Cues for Facial Expression Recognition", FUZZ-IEEE 2005, May 22-25, Reno, Nevada, USA.

[C44] G. Caridakis, K. Karpouzis, G. Sapountzaki, S-E. Fotinea, E. Efthimiou, "A dynamic environment for Greek Sign Language Synthesis using virtual characters", ACM Web3D 2005 Symposium, March 29 - April 1 2005, Bangor, UK.

[C43] P. Mylonas, K. Karpouzis, G. Andreou and S. Kollias, “Towards an integrated personalized interactive video environment”, Proceedings of the 6th IEEE International Symposium on Multimedia Software Engineering, Miami, Florida, USA, December 2004.

[C42] M. Wallace, K. Karpouzis, “Personalized Content Browsing Based on Notions of Context”, Proceedings of the International Conference on Multi-platform e-Publishing, November 2004, Athens, Greece.

[C41] A. Raouzaiou, K. Karpouzis, S. Kollias, “Emotion Synthesis in the MPEG-4 Framework”, IEEE International workshop on Multimedia Signal Processing (MMSP) 2004, Siena, Italy.

[C40] A. Raouzaiou, K. Karpouzis and S. Kollias, “Emotion Synthesis in Virtual Environments”, 6th International Conference on Enterprise Information Systems, April 2004, Porto, Portugal.

[C39] T. Balomenos, A. Raouzaiou, S. Ioannou, A. Drosopoulos, K. Karpouzis, S. Kollias, “Emotion Analysis in Man-Machine Interaction Systems”, in Samy Bengio, Hervé Bourlard (Eds.), Machine Learning for Multimodal Interaction - MLMI04, LNCS 3361, pp. 318 - 328, Springer-Verlag.

[C38] K. Karpouzis, G. Caridakis, S-E. Fotinea, E. Efthimiou, “Educational Resources and Implementation of a Greek Sign Language Synthesis Architecture”, International Workshop on Web3D Technologies in Learning, Education and Training, Udine, Italy

[C37] G. Caridakis, K. Karpouzis, “Design and Implementation of a Greek Sign Language Synthesis System”, 6th WSEAS International Conference on Μathematical methods and computational techniques in electrical engineering (MMACTEE 2004), Athens, Greece.

[C36] A. Raouzaiou, S. Ioannou, G. Akrivas, K. Karpouzis and S. Kollias, “Adaptation of Expression Analysis Based on Evaluation Principles”, Fourth European Symposium on Intelligent Technologies and their implementation on Smart Adaptive Systems (Eunite 2004), Aachen, Germany, June 2004.

[C35] G. Sapountzaki, E. Efthimiou, K. Karpouzis, V. Kourbetis, “Developing an e-Learning Platform for Greek Sign Language”, 4th International Conference on Language Resources and Evaluation (LREC) 2004, Lisbon, Portugal.

[C34] E. Efthimiou, G. Sapountzaki, K. Karpouzis and S-E. Fotinea, “Developing an e-Learning Platform for the Greek Sign Language”, in K. Miesenberger, J. Klaus, W. Zagler (Eds.), Computer Helping People with Special Needs - 9th International Conference on Computers Helping People with Special Needs, LNCS 3118, pp. 1107 - 1113, Springer-Verlag, 2004.

[C33] E. Papaioannou, K. Karpouzis, P. De Cuetos, H. Guillemot, A. Demiris, N. Ioannidis, “MELISA - A Distributed Multimedia System for Multi-Platform Interactive Sports Content Broadcasting”, IEEE EUROMICRO Conference, August 31st – September 3rd , Rennes, France, 2004.

[C32] A. Raouzaiou, K. Karpouzis, S. Kollias, “Emotion synthesis in virtual environments”, I. Seruca, J. Cordeiro, S. Hammoudi, J. Filipe, (eds.), Enterprise Information Systems VI - 6th International Conf. on Enterprise Information Systems, Part V, Kluwer Academic Publishers, 2006.

[C31] S. Ioannou, A. Raouzaiou, K. Karpouzis and S. Kollias, “Adaptation of Facial Feature Extraction and Rule Generation in Emotion-Analysis Systems”, International Joint Conference on Neural Networks (IJCNN 2004), Budapest, Hungary, July 2004.

[C30] S. Ioannou, A. Raouzaiou, K. Karpouzis, M. Pertselakis, N. Tsapatsoulis, S.Kollias, “Adaptive Rule-Based Facial Expression Recognition”, in G. Vouros, T. Panayiotopoulos (Eds.), 3rd Hellenic Conf. on Artificial Intelligence – LNAI 3025, Springer-Verlag, pp. 466 - 475, 2004.

[C29] A. Raouzaiou, K. Karpouzis, St. Kollias, “Online gaming and emotion representation”, in N. Garcia, J. Martinez, L. Salgado, (eds.), VLBV 03 – Visual Content Processing and Representation, LNCS 2849, Springer, pp. 298 – 305, 2003.

[C28] K. Karpouzis, A. Raouzaiou, S. Kollias, “Emotionally-rich Virtual Environments”, 9th Panhellenic Conference on Informatics (PCI'2003), Thessaloniki, Greece, 2003.

[C27] K. Karpouzis, A. Raouzaiou, N. Tsapatsoulis and S. Kollias, “Emotion Representation for Virtual Environments”, ConTEL 2003, 7th International Conference on Telecommunications, Zagreb, Croatia, June 11-13, 2003.

[C26] A. Raouzaiou, S. Ioannou, K. Karpouzis, S. Kollias, R. Cowie, “Facial Expression Analysis”, Eunite 2003, Third European Symposium on Intelligent Technologies, Hybrid Systems and their implementation on Smart Adaptive Systems, Oulu, Finland, 2003.

[C25] I. Maglogiannis, C. Bourletidis, K. Karpouzis, “Combining Synchronous and Asynchronous Distance Learning for Adult Education: The Greek Army Case”, 3rd IEEE International Conference on Advanced Learning Technologies (ICALT), Athens, Greece, July 2003.

[C24] M. Wallace, M. Stefanou, K. Karpouzis, S. Kollias, “Towards supporting the teaching of history using an intelligent information system that relies on the electronic road metaphor”, 3rd IEEE International Conf. on Advanced Learning Technologies (ICALT), Athens, Greece, July 03.

[C23] Th. Balomenos, A. Raouzaiou, K. Karpouzis, S. Kollias and R. Cowie, “An Introduction to Emotionally Rich Man-Machine Intelligent Systems”, Eunite 2003, Third European Symposium on Intelligent Technologies, Hybrid Systems and their implementation on Smart Adaptive Systems, Oulu, Finland, 2003.

[C22] K. Karpouzis, A. Raouzaiou, P. Tzouveli and S. Kollias, “MPEG-4: One multimedia standard to unite all”, IEEE International Conf. on Multimedia & Expo (ICME), Baltimore, USA, 2003.

[C21] A. Raouzaiou, S. Ioannou, K. Karpouzis, N. Tsapatsoulis, S. Kollias, R. Cowie, “An Intelligent Scheme for Facial Expression Recognition”, in O. Kaynak, E. Alpaydin, E. Oja, L. Xu, (eds.), ICANN 2003 – Artificial Neural Networks and Neural Information Processing, LNCS 2714, Springer, pp. 1109 – 1116, 2003.

[C20] A. Raouzaiou, K. Karpouzis and S. Kollias, “Emotion Representation for Online Gaming”, IEEE International Conference on Multimedia & Expo (ICME), pp. 417 – 420, Baltimore, 2003.

[C19] A. Drosopoulos, Th. Balomenos, K. Karpouzis, St. Kollias, “Emotionally-rich Man‑machine Interaction Based on Gesture Analysis”, Human-Computer Interaction International 2003, Crete, Greece, 2003.

[C18] K. Karpouzis, A. Raouzaiou, St. Kollias, “"Moving" avatars: emotion synthesis in virtual worlds”, Human-Computer Interaction International 2003, Crete, Greece, 2003.

[C17] Th. Balomenos, A. Drosopoulos, A. Raouzaiou, K. Karpouzis, St. Kollias, “Use of the finite element method in 3D structure and motion estimation of non-rigid objects”, SPIE Electronic Imaging 2003, Santa Clara, CA, 2003.

[C16]G. Akrivas, S. Ioannou, El. Karakoulakis, K. Karpouzis, Y. Avrithis, An. Delopoulos, St. Kollias, H. Varlamis, M. Vazirgiannis, “An Intelligent System for Retrieval and Mining of Audiovisual Material Based on the MPEG-7 Description Schemes”, Eunite 2001, European Symposium on Intelligent Technologies, Hybrid Systems and their implementation on Smart Adaptive Systems, Tenerife, Spain, 2001.

[C15]K. Ntalianis, S. Ioannou, K. Karpouzis, G. Moschovitis, St. Kollias, “Visual Information Retrieval from Annotated Large Audiovisual Assets Based on User Profiling and Collaborative Recommendations”, Proceedings of the IEEE International Conference on Multimedia and Exposition (ICME 01), Tokyo, Japan, 2001.

[C14]A. Raouzaiou, K. Karpouzis, St. Kollias, “Facial Expression Analysis in MPEG-4 Sequences", International Conference on Augmented Virtual Environments and 3D Imaging (ICAV3D), Mykonos, Greece, August 2001.

[C13]S. Ioannou, G. Moschovitis, K. Ntalianis, K. Karpouzis, St. Kollias, “Effective Access to Large Audiovisual Assets Based on User Preferences”, ACM Multimedia 2000, Los Angeles, USA, November 2000.

[C12]A. Doulamis, K. Ntalianis, N. Doulamis, K. Karpouzis, St. Kollias, “Unsupervised Tracking of Stereoscopic Video Objects Employing Neural Networks Retraining”, Congress Conference on Artificial Intelligence, Barcelona, Spain, 2000.

[C11]N. Tsapatsoulis, K. Karpouzis, G. Stamou, F. Piat, St. Kollias, “A Fuzzy System for Emotion Classification Based on the MPEG–4 Facial Definition Parameter Set”, European Signal Processing Conference (EUSIPCO), September 2000, Tampere, Finland, 2000.

[C10] G. Moschovitis, K. Karpouzis, St. Kollias, “Virtual Worlds Modeling for Web Deployment”, IEEE Melecom 00, Cyprus, 2000.

[C09] K. Karpouzis, N. Tsapatsoulis, St. Kollias, ”Moving to Continuous Facial Expression Space using the MPEG–4 Facial Definition Parameter (FDP) Set”, SPIE Electronic Imaging 00, San Jose, CA, USA, 2000.

[C08] K. Karpouzis, G. Votsis, J. Xirouhakis, G. Stamou, St. Kollias, “An Intelligent Multimedia System for Efficient Image Browsing and retrieval”, CBMI 99, France, 1999.

[C07] K. Karpouzis, G. Votsis, G. Moschovitis, St. Kollias, “Emotion Recognition Using Feature Extraction and 3–D Models”, in Proc. of 3rd WSEAS/IEEE/IMCS World Multiconference on Circuits and Systems Communications and Computers, pp. 5371-5376, Athens, Greece, 1999.

[C06] K. Karpouzis, G. Votsis, J. Xirouhakis, St. Kollias, “Efficient Use of Content–Based Retrieval in Quick Browsing: a Realization”, IEEE Workshop on Multimedia Signal Proc., Denmark, 1999.

[C05] J. Xirouhakis, G. Votsis, K. Karpouzis, St. Kollias, “Efficient Browsing in Multimedia Databases Using Intelligent Agents and Content–Based Retrieval Schemes”, IEEE Workshop on Multimedia Signal Processing (MMSP 98), Los Angeles, USA, 1998.

[C04] K. Karpouzis, St. Kollias, “The Rendering Pipeline in the Classroom: A Diversified Approach”, 3rd ACM Conf. on Integrating Technology into CS Education, Dublin, Ireland, 1998.

[C03] St. Tzavidas, K. Karpouzis, St. Kollias, “Parametric Representation of Basic Human Locomotion”, IEEE European Robotics and Intelligent Systems Conference, Athens, 1998.

[C02] G. Votsis, N. Tsapatsoulis, K. Karpouzis, St. Kollias, “A Simplified Representation of 3D Human Faces Adapted from 2D Images”, Noblesse Workshop on Non–Linear Model Based Image Analysis, Glasgow, Scotland, 1998.

[C01] N. Tsapatsoulis, K. Karpouzis, G. Votsis, St. Kollias, “Analysis by Synthesis of Facial Images Based on Frontal and Profile Views”, IWSNHC3DI ’97, Greece, 1997.