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Publications
Projects
Team
Courses
Vacancies
News
Contact

Publications

Journals

Book Chapters

Conferences

Preprints

Journals

Ilias Siniosoglou, Vasileios Argyriou, George Fragulis, Panagiotis Fouliras, Georgios Th. Papadopoulos, Anastasios Lytos, Panagiotis Sarigiannidis, “Applied Federated Model Personalisation in the Industrial Domain: A Comparative Study”, IEEE Open Journal of the Communications Society, 2024.
Ν. Rodis, C. Sardianos and G. Th. Papadopoulos, “Current Challenges and Future Research Directions in Multimodal Explainable Artificial Intelligence”, ERCIM News 134, 2023.
R. King, G. Kioumourtzis and G. Th. Papadopoulos, “Countering Terrorist Financing”, ERCIM News 129, 2022.
N. Adaloglou, T. Chatzis, I. Papastratis, A. Stergioulas, G. Th. Papadopoulos, V. Zacharopoulou, G. Xydopoulos, K. Atzakas, D. Papazachariou and P. Daras, “A comprehensive study on deep learning-based methods for sign language recognition”, IEEE Transactions on Multimedia, Vol. 24, pp. 1750-1762, 2021.
G. Th. Papadopoulos, M. Antona and C. Stephanidis, “Towards open and expandable cognitive AI architectures for large-scale multi-agent human-robot collaborative learning”, IEEE Access, 9, 2021.
S. Thermos, G. Th. Papadopoulos, P. Daras and G. Potamianos, “Deep sensorimotor learning for RGB-D object recognition”, Elsevier Computer Vision and Image Understanding (CVIU) 190, 2020.
G. Th. Papadopoulos and P. Daras, “Human Action Recognition Using 3D Reconstruction Data”, IEEE Transactions on Circuits and Systems for Video Technology, 2016.
G. Th. Papadopoulos, K. C. Apostolakis and P. Daras, “Gaze-based Relevance Feedback for Realizing Region-based Image Retrieval”, IEEE Transactions on Multimedia, Vol. 16, No. 2, pp. 440-454, February 2014.
G. Th. Papadopoulos, V. Mezaris, I. Kompatsiaris and M. G. Strintzis, “Joint Modality Fusion and Temporal Context Exploitation for Semantic Video Analysis”, EURASIP Journal on Advances in Signal Processing 2011.
G. Th. Papadopoulos, C. Saathoff, H. J. Escalante, V. Mezaris, I. Kompatsiaris and M. G. Strintzis, “A Comparative Study of Object-level Spatial Context Techniques for Semantic Image Analysis”, Computer Vision and Image Understanding, Elsevier, vol. 115, no. 9, pp. 1288-1307, September 2011.
S. Nikolopoulos, G. Th. Papadopoulos, I. Kompatsiaris and I. Patras, “Evidence driven image interpretation by combining implicit and explicit knowledge in a bayesian network”, IEEE Transactions on Systems, Man and Cybernetics – Part B: Cybernetics, vol.41, no.5, pp.1366-1381, Oct. 2011.
V. Mezaris, S. Gidaros, G. Th. Papadopoulos, W. Kasper, J. Steffen, R. Ordelman, M. Huijbregts, F. de Jong, I. Kompatsiaris and M. G. Strintzis, “A System for the Semantic Multimodal Analysis of News Audio-Visual Content”, EURASIP Journal on Advances in Signal Processing, vol. 2010 (2010), Article ID 645052.
G. Th. Papadopoulos, A. Briassouli, V. Mezaris, I. Kompatsiaris and M. G. Strintzis: “Statistical Motion Information Extraction and Representation for Semantic Video Analysis”, IEEE Transactions on Circuits and Systems for Video Technology (TCSVT), Vol. 19, No. 10, pp. 1513-1528, October 2009.
G. Th. Papadopoulos, V. Mezaris, I. Kompatsiaris and M. G. Strintzis: “Combining Global and Local Information for Knowledge-Assisted Image Analysis and Classification”, EURASIP Journal on Advances in Signal Processing, Special Issue on Knowledge-Assisted Media Analysis for Interactive Multimedia Applications, vol. 2007 (2007), Article ID 45842.
G. Th. Papadopoulos, Ph. Mylonas, V. Mezaris, Y. Avrithis, I. Kompatsiaris: “Knowledge-Assisted Image Analysis Based on Context and Spatial Optimization”, International Journal on Semantic Web and Information Systems, Vol. 2, Issue 3, pp. 17-36, July-September 2006.

Book Chapters

J. Freeman, A. Miotto, J. Lessiter, P. Verschure, P. Omedas, A. K. Seth, G. Th. Papadopoulos, A. Caria, E. André, M. Cavazza, L. Gamberini, A. Spagnolli, J. Jost, S. Kouider, B. Takács, A. Sanfeliu, D. De Rossi, C. Cenedese, J. L. Bintliff and G. Jacucci, “The Human as the Mind in the Machine: Addressing Big Data”, in Human Computer Confluence, 198-212, Publ. Sciendo Migration, 2015.
Th. Athanasiadis, Ph. Mylonas, G. Th. Papadopoulos, V. Mezaris, Y. Avrithis, I. Kompatsiaris and M. G. Strintzis, “Knowledge-Driven Segmentation and Classification”, Multimedia Semantics: Metadata, Analysis and Interaction, R. Troncy, B. Huet and S. Schenk (Editors), pp. 163-182, Wiley, July 2011.
V. Mezaris, G. Th. Papadopoulos, A. Briassouli, I. Kompatsiaris, M. G. Strintzis: “Semantic Video Analysis and Understanding”, in Encyclopedia of Information Science and Technology (2nd Edition), Mehdi Khosrow-Pour (Editor), vol. VII, pp. 3419-3425, IGI Global, October 2008.

Conferences

Manousos Linardakis, Iraklis Varlamis, Georgios Th. Papadopoulos, “Multi-robot maze exploration using an efficient cost-utility method”, EETN Conference on Artificial Intelligence (SETN), 2024.
Kyriaki Miniadou, Asterios Leonidis, Georgios Th. Papadopoulos, Constantine Stephanidis, “Enhancing Secure Cross-Border Collaboration among Law Enforcement Agencies for Facial Biometric Search”, 5th International Conference in Electronic Engineering, Information Technology & Education (EEITE), 2024.
Christos Sardianos, Chrysostomos Symvoulidis, Matthias Schlogl, Iraklis Varlamis, Georgios Th. Papadopoulos, “Exploring Machine Learning Algorithms for Infection Detection Using GC-IMS Data: A Preliminary Study”, 5th International Conference in Electronic Engineering, Information Technology & Education (EEITE), 2024.
Jorgen Cani, Ioannis Mademlis, Adamantia Anna Rebolledo Chrysochoou, Georgios Th Papadopoulos, “Illicit object detection in X-ray images using Vision Transformers”, 5th International Conference in Electronic Engineering, Information Technology & Education (EEITE), 2024.
Kyriaki Miniadou, Eirini Kyriakou, Spyridon Tzagkarakis, Asterios Leonidis, Georgios Th. Papadopoulos, Constantine Stephanidis, “Investigating visual analytics against terrorist financing in Dark Web marketplaces”, IEEE Int. Conf. on Big Data 2023, 2024.
Sotirios Konstantakos, Despina Ioanna Chalkiadaki, Ioannis Mademlis, Adamantia Anna Rebolledo Chrysochoou, Georgios Th. Papadopoulos, “Self-supervised visual learning for analyzing firearms trafficking activities on the Web”, IEEE Int. Conf. on Big Data 2023, 2024.
Ioannis Mademlis, Georgios Batsis, Adamantia Anna Rebolledo Chrysochoou, Georgios Th. Papadopoulos, “Visual inspection for illicit items in X-ray images using Deep Learning”, IEEE Int. Conf. on Big Data 2023, 2024.
G. Batsis, I. Mademlis and G. Th. Papadopoulos, “Illicit item detection in X-ray images for security applications”, IEEE International Conference on Big Data Service, 2023.
G. Th. Papadopoulos, A. Leonidis, M. Antona and C. Stephanidis, “User profile-driven large-scale multi-agent learning from demonstration in federated human-robot collaborative environments”, International Conference on Human-Computer Interaction (HCI International), pp. 548-563, 2022.
C. Chatzikonstantinou, G. Th. Papadopoulos, K. Dimitropoulos and P. Daras, “Neural Network Compression Using Higher-Order Statistics and Auxiliary Reconstruction Losses”, IEEE/CVF Conference on Computer Vision and Pattern Recognition (IEEE CVPR), pp. 716-717, 2020.
A. Psaltis, G. Th. Papadopoulos and P. Daras, “Cross-domain Knowledge Transfer Schemes for 3D Human Action Recognition”, 27th European Signal Processing Conference, EUSIPCO, 2019.
K. Stavridis, A. Psaltis, A. Dimou, G. Th. Papadopoulos and P. Daras, “Deep Spatio-Temporal Modeling for Object-Level Gaze-Based Relevance Assessment”, 27th European Signal Processing Conference, EUSIPCO, 2019.
G. Th. Papadopoulos, A. Axenopoulos, D. Giakoumis, I. Kostavelis, A. Papadimitriou, S. Sillaurren, L. Bastida, O. S. Oguz, D. Wollherr, E. Garnics, V. Vouloutsi, P. Verschure, D. Tzovaras and P. Daras, “A hybrid human-robot collaborative environment for recycling electrical and electronic equipment”, 5th IEEE Int. Conf. on Internet of People (IoP 2019), 19-23 August, Leicester, UK, 2019.
K. Gkountakos, A. Dimou, G. Th. Papadopoulos and P. Daras, “Incorporating Textual Similarity in Video Captioning Schemes”, IEEE International Conference on Engineering, Technology and Innovation (ICE), 2019.
K. Gkountakos, T. Semertzidis, G. Th. Papadopoulos and P. Daras, “A Reliability Object Layer for Deep Hashing-Based Visual Indexing”, In International Conference on Multimedia Modeling, pp. 132-143, Springer, 2019.
S. Thermos, G. Th. Papadopoulos, P. Daras and G. Potamianos, “Attention-enhanced sensorimotor object recognition”, IEEE International Conference on Image Processing (ICIP), Athens, Greece, October 2018.
A. Psaltis, G. Th. Papadopoulos, P. Daras, “Deep 3D Flow Features for Human Action Recognition.”, IEEE Int. Conf. on Content-Based Multimedia Indexing (CBMI 2018), pp. 1-6, La Rochelle, France, September 2018.
M. Savva, F. Yu, H. Su, A. Kanezaki, T. Furuya, R. Ohbuchi, Z. Zhou, R. Yu, S. Bai, X. Bai, M. Aono, A. Tatsuma, S. Thermos, A. Axenopoulos, G. Th. Papadopoulos, P. Daras, X. Deng, Z. Lian, B. Li, H. Johan, Y. Lu and S. Mk, “SHREC’17 Track: Large-Scale 3D Shape Retrieval from ShapeNet Core55”, Eurographics Workshop on 3D Object Retrieval, 2017.
G. Th. Papadopoulos and P. Daras, “Global Flow and Temporal-Shape Descriptors for Human Action Recognition from 3D Reconstruction Data”, International Conference on Machine Learning and Data Mining in Pattern Recognition (MLDM), 2017.
S. Thermos, G. Th. Papadopoulos, P. Daras and G. Potamianos, “Deep Affordance-grounded Sensorimotor Object Recognition”, IEEE Conference on Computer Vision and Pattern Recognition (CVPR 2017), Honolulu, Hawaii, USA, July 2017.
M. Savva, F. Yu, H. Su, A. Kanezaki, T. Furuya, R. Ohbuchi, Z. Zhou, R. Yu, S. Bai, X. Bai, M. Aono, A. Tatsuma, S. Thermos, A. Axenopoulos, G. Th. Papadopoulos, P. Daras, X. Deng, Z. Lian, B. Li, H. Johan, Y. Lu, S. Mk, “SHREC’17 track: Large-Scale 3D Shape Retrieval from ShapeNet Core55”, Eurographics Workshop on 3D Object Retrieval, 2017.
K. Gkountakos, T. Semertzidis, G. Th. Papadopoulos and P. Daras, “Incorporation of Semantic Segmentation Information in Deep Hashing Techniques for Image Retrieval”, IEEE International Conference on Engineering, Technology and Innovation (23rd ICE/ITMC), Madeira Island, Portugal, 27-29 June, 2017.
G. Th. Papadopoulos, E. Machairidou and P. Daras, “Deep cross-layer activation features for visual recognition”, IEEE International Conference on Image Processing (ICIP), Phoenix, Arizona, USA, September 2016.
G. Th. Papadopoulos and P. Daras, “Local Descriptions for Human Action Recognition from 3D Reconstruction Data”, IEEE International Conference on Image Processing (ICIP 2014), pp. 2814-2818, Paris, France, November 2014.
G. Th. Papadopoulos, A. Axenopoulos and P. Daras, “Real-time Skeleton-tracking-based Human Action Recognition Using Kinect Data”, 20th International Conference on MultiMedia Modeling (MMM 2014), pp. 473-483, Dublin, Ireland, January 2014.
S. Nikolopoulos, G. Th. Papadopoulos, I. Kompatsiaris and I. Patras, “Image Interpretation by Combining Ontologies and Bayesian Networks”, 7th Hellenic Conference on Artificial Intelligence (SETN 2012), Lamia-Greece, May 2012.
G. Th. Papadopoulos, V. Mezaris, I. Kompatsiaris and M. G. Strintzis, “Probabilistic Combination of Spatial Context with Visual and Co-occurrence Information for Semantic Image Analysis”, IEEE International Conference on Image Processing (ICIP 2010), Hong Kong Convention and Exhibition Centre, Hong Kong, accepted for publication.
G. Th. Papadopoulos, V. Mezaris, I. Kompatsiaris and M. G. Strintzis, “A Statistical Learning Approach to Spatial Context Exploitation for Semantic Image Analysis”, 20th International Conference on Pattern Recognition (ICPR 2010), pp. 3138-3142, Istanbul, Turkey, August 2010.
G. Th. Papadopoulos, V. Mezaris, I. Kompatsiaris and M. G. Strintzis, “Combining Multimodal and Temporal Contextual Information for Semantic Video Analysis”, IEEE International Conference on Image Processing (ICIP 2009), pp. 4325-4328, Cairo, Egypt, November 2009.
S. Nikolopoulos, G. Th. Papadopoulos, I. Kompatsiaris and I. Patras, “An evidence-driven probabilistic inference framework for semantic image understanding”, 6th International Conference on Machine Learning and Data Mining in Pattern Recognition (MLDM 2009), pp. 525-539, Leipzig, Germany, July 2009.
G. Th. Papadopoulos, C. Saathoff, M. Grzegorzek, V. Mezaris, I. Kompatsiaris, S. Staab and M. G. Strintzis, “Comparative Evaluation of Spatial Context Techniques for Semantic Image Analysis”, 10th International Workshop on Image Analysis for Multimedia Interactive Services (WIAMIS 2009), pp. 161-164, London, UK, May 2009.
T. Athanasiadis, N. Simou, G. Th. Papadopoulos, R. Benmokhtar, K. Chandramouli, V. Tzouvaras, V. Mezaris, M. Phiniketos, Y. Avrithis, Y. Kompatsiaris, B. Huet and E. Izquierdo, “Integrating Image Segmentation and Classification for Fuzzy Knowledge-based Multimedia Indexing”, 15th International Multimedia Modeling Conference (MMM ’09), Sophia-Antipolis, France, January 2009.
G. Th. Papadopoulos, T. Athanasiadis, N. Simou, R. Benmokhtar, K. Chandramouli, V. Tzouvaras, V. Mezaris, M. Phiniketos, Y. Avrithis, Y. Kompatsiaris, B. Huet and E. Izquierdo, “Combining Segmentation and Classification Techniques for Fuzzy Knowledge-based Semantic Image Annotation”, 3rd International Conference on Semantics And digital Media Technologies (SAMT ’08), Poster and Demos research track, Koblenz, Germany, December 2008.
G. Th. Papadopoulos, A. Briassouli, V. Mezaris, I. Kompatsiaris and M. G. Strintzis, “Semantic Video Analysis Based on Estimation and Representation of Higher-Order Motion Statistics”, 3rd International Workshop on Semantic Media Adaptation and Personalization (SMAP ’08), pp. 21-26, Prague, Czech Republic, December 2008.
J. Molina, V. Mezaris, P. Villegas, G. Tolias, E. Spyrou, N. Sofou, J. Rodríguez-Benito, G. Th. Papadopoulos, S. Nikolopoulos, J. M. Martínez, I. Kompatsiaris, P. Kapsalas, A. Dimou, E. Bru, Y. Avrithis, T. Adamek, “MESH participation to TRECVID2008 HLFE” Proc. TRECVID 2008 Workshop, Gaithersburg, MD, USA, November 2008.
P. Wilkins, D. Byrne, G. J. F. Jones, H. Lee, G. Keenan, K. McGuinness, G. Th. Papadopoulos, V. Mezaris, I. Kompatsiaris, “K-Space at TRECVid 2008” Proc. TRECVID 2008 Workshop, Gaithersburg, MD, USA, November 2008.
G. Th. Papadopoulos, V. Mezaris, I. Kompatsiaris and M. G. Strintzis, “Estimation and Representation of Accumulated Motion Characteristics for Semantic Event Detection”, IEEE International Conference on Image Processing, Workshop on Multimedia Information Retrieval (ICIP-MIR 2008), pp. 41-44, San Diego, California, USA, October 2008.
G. Th. Papadopoulos, V. Mezaris, I. Kompatsiaris and M. G. Strintzis, “Accumulated Motion Energy Fields Estimation and Representation for Semantic Event Detection”, Proc. International Conference on Image and Video Retrieval (CIVR 2008), Niagara Falls, Canada, July 2008.
V. Mezaris, S. Gidaros, G. Th. Papadopoulos, W. Kasper, R. Ordelman, F.M.G. de Jong and I. Kompatsiaris, “Knowledge-assisted cross-media analysis of audio-visual content in the news domain”, 6th International Workshop on Content-Based Multimedia Indexing (CBMI 2008), pp. 280-287, London, UK, July 2008.
G. Th. Papadopoulos, K. Chandramouli, V. Mezaris, I. Kompatsiaris, E. Izquierdo and M.G. Strintzis, “A Comparative Study of Classification Techniques for Knowledge-Assisted Image Analysis”, 9th International Workshop on Image Analysis for Multimedia Interactive Services (WIAMIS 2008), pp. 4-7, Klagenfurt, Austria, May 2008.
G. Akrivas, G. Th. Papadopoulos, M. Douze, J. Heinecke, N. O’Connor, C. Saathoff and S. Waddington, “Knowledge-based Semantic Annotation and Retrieval of Multimedia Content”, Proc. Second International Conference on Semantics and Digital Media Technologies (SAMT 2007), pp. 5-6, Genova, Italy, December 2007.
G. Th. Papadopoulos, V. Mezaris, I. Kompatsiaris and M. G. Strintzis, “Ontology-Driven Semantic Video Analysis Using Visual Information Objects”, Proc. Second International Conference on Semantics and Digital Media Technologies (SAMT 2007), pp. 56-69, Genova, Italy, December 2007.
P. Wilkins, T. Adamek, D. Byrne, G. J. F. Jones, H. Lee, G. Keenan, G. Th. Papadopoulos, S. Vrochidis, V. Mezaris, I. Kompatsiaris, et al, “K-Space at TRECVid 2007” 5th TRECVID Workshop, Gaithersburg, MD, USA, November 2007.
G. Th. Papadopoulos, V. Mezaris, I. Kompatsiaris and M. G. Strintzis, “Combining Content and Context Information for Semantic Image Analysis and Classification”, 15th European Signal Processing Conference (EUSIPCO 2007), special session on The Semantic Gap in Visual Information Retrieval, pp. 708-712, Poznan, Poland, September 2007.
G. Th. Papadopoulos, V. Mezaris, S. Dasiopoulou and I. Kompatsiaris, “Semantic Image Analysis Using a Learning Approach and Spatial Context”, 1st International Conference on Semantics and Digital Media Technologies (SAMT, formely EWIMT), special session on Context-based Multimedia Analysis and Representation, pp. 199-211, Athens, Greece, December 2006.
S. Dasiopoulou, G. Th. Papadopoulos, Ph. Mylonas, Y. Avrithis and I. Kompatsiaris, “Using Context and a Genetic Algorithm for Knowledge-Assisted Image Analysis”, 1st International Conference on Semantics And digital Media Technologies (SAMT, formely EWIMT), Athens, Greece, 2006.
G. Th. Papadopoulos, P. Panagi, S. Dasiopoulou, V. Mezaris and I. Kompatsiaris, “A Learning Approach to Semantic Image Analysis”, 2nd International Mobile Multimedia Communications Conference (Mobimedia, formely MSAN), K-Space special session on Automatic Annotation and Retrieval of Multimedia Content, Alghero, Sardinia, Italy, September 2006.
P. Panagi, S. Dasiopoulou, G. Th. Papadopoulos, I. Kompatsiaris and M.G. Strintzis, “A Genetic Algorithm Approach to Ontology-Driven Semantic Image Analysis”, 3rd IEE International Conference of Visual Information Engineering (VIE), K-Space Research on Semantic Multimedia Analysis for Annotation and Retrieval special session, Bangalore, India, 2006.

Preprints

Artemis Stefanidou, Jorgen Cani, Thomas Papadopoulos, Panagiotis Radoglou-Grammatikis, Panagiotis Sarigiannidis, Iraklis Varlamis, Georgios Th. Papadopoulos, “Leveraging Digital Twin Technologies for Public Space Protection and Vulnerability Assessment”, arXiv preprint arXiv:2408.17136, 2024.
Panagiotis Alimisis, Ioannis Mademlis, Panagiotis Radoglou-Grammatikis, Panagiotis Sarigiannidis, Georgios Th. Papadopoulos, “Advances in Diffusion Models for Image Data Augmentation: A Review of Methods, Models, Evaluation Metrics and Future Research Directions”, arXiv preprint arXiv:2407.04103, 2024.
Ioannis Mademlis, Jorgen Cani, Marina Mancuso, Caterina Paternoster, Emmanouil Adamakis, George Margetis, Sylvie Chambon, Alain Crouzil, Loubna Lechelek, Georgia Dede, Spyridon Evangelatos, George Lalas, Franck Mignet, Pantelis Linardatos, Konstantinos Kentrotis, Henryk Gierszal, Piotr Tyczka, Sophia Karagiorgou, George Pantelis, Georgios Stavropoulos, Konstantinos Votis, Georgios Th. Papadopoulos, “CEASEFIRE: An AI-powered system for combatting illicit firearms trafficking”, arXiv preprint arXiv:2406.14949, 2024.
Pavlos S. Bouzinis, Panagiotis Radoglou-Grammatikis, Ioannis Makris, Thomas Lagkas, Vasileios Argyriou, Georgios Th. Papadopoulos, Panagiotis Sarigiannidis, George K. Karagiannidis, “StatAvg: Mitigating Data Heterogeneity in Federated Learning for Intrusion Detection Systems”, arXiv preprint arXiv:2405.13062, 2024.
Sotirios Konstantakos, Despina Ioanna Chalkiadaki, Ioannis Mademlis, Yuki M. Asano, Efstratios Gavves, Georgios Th. Papadopoulos, “Self-supervised visual learning in the low-data regime: a comparative evaluation”, arXiv preprint arXiv:2404.17202, 2024.
N. Rodis, C. Sardianos, G. Th. Papadopoulos, P. Radoglou-Grammatikis, P. Sarigiannidis and I. Varlamis, “Multimodal Explainable Artificial Intelligence: A Comprehensive Review of Methodological Advances and Future Research Directions”, arXiv preprint, 2023.
D. Tsirmpas, I. Gkionis, G. Th. Papadopoulos and I. Mademlis, “Neural Natural Language Processing for Long Texts: A Survey of the State-of-the-Art”, arXiv preprint, 2023.
Ioannis Mademlis, Marina Mancuso, Caterina Paternoster, Spyridon Evangelatos, Emma Finlay, Joshua Hughes, Panagiotis Radoglou-Grammatikis, Panagiotis Sarigiannidis, Georgios Stavropoulos, Konstantinos Votis, Georgios Th. Papadopoulos, “The invisible arms race: digital trends in illicit goods trafficking and AI-enabled responses”, techRxiv preprint, 2023

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