Publications | MeVer

Publications

Ioannis Sarridis, Christos Koutlis, Symeon Papadopoulos, and Christos Diou (2024). FLAC: Fairness-Aware Representation Learning by Suppressing Attribute-Class Associations. IEEE Transactions on Pattern Analysis and Machine Intelligence.

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Christos Koutlis, and Symeon Papadopoulos (2024). Leveraging representations from intermediate encoder-blocks for synthetic image detection. European Conference on Computer Vision.

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Vasileios Arailopoulos, Christos Koutlis, Symeon Papadopoulos, and Panagiotis C. Petrantonakis (2024). PolyMeme: Fine-Grained Internet Meme Sensing. Sensors.

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Georgia Baltsou, Ioannis Sarridis, Christos Koutlis, and Symeon Papadopoulos (2024). SDFD: Building a Versatile Synthetic Face Image Dataset with Diverse Attributes. 2024 IEEE 18th International Conference on Automatic Face and Gesture Recognition (FG).

Arjun Roy, Christos Koutlis, Symeon Papadopoulos, and Eirini Ntoutsi (2024). FairBranch: Mitigating Bias Transfer in Fair Multi-task Learning. 2024 International Joint Conference on Neural Networks (IJCNN).

Javier Huertas-Tato, Christos Koutlis, Symeon Papadopoulos, David Camacho, and Ioannis Kompatsiaris (2024). A CLIP-based siamese approach for meme classification. 2024 International Joint Conference on Neural Networks (IJCNN).

Ioulietta Lazarou, Anna-Maria Krooupa, Spiros Nikolopoulos, Lazaros Apostolidis, Nikos Sarris, Symeon Papadopoulos, and Ioannis Kompatsiaris (2024). Cancer Patients’ Perspectives and Requirements of Digital Health Technologies: A Scoping Literature Review. MDPI, Cancers. 2024; 16(13):2293.

Manos Schoinas, and Symeon Papadopoulos (2024). SIDBench: A Python framework for reliably assessing synthetic image detection methods. Proceedings of the 3rd ACM International Workshop on Multimedia AI against Disinformation..

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Zacharias Chrysidis, Stefanos-Iordanis Papadopoulos, Symeon Papadopoulos, and Panagiotis Petrantonakis (2024). Credible, Unreliable or Leaked?: Evidence verification for enhanced automated fact-checking. MAD ‘24 Proceedings of the 3rd ACM International Workshop on Multimedia AI against Disinformation.

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Ioannis Sarridis, Christos Koutlis, Symeon Papadopoulos, and Christos Diou (2024). FaceX: Understanding Face Attribute Classifiers through Summary Model Explanations. Proceedings of the 2024 International Conference on Multimedia Retrieval.

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Pietro Melzi, Ruben Tolosana, Ruben Vera-Rodriguez, Minchul Kim, Christian Rathgeb, Xiaoming Liu, Ivan DeAndres-Tame, Aythami Morales, Julian Fierrez, Javier Ortega-Garcia, Weisong Zhao, Xiangyu Zhu, Zheyu Yan, Xiao-Yu Zhang, Jinlin Wu, Zhen Lei, Suvidha Tripathi, Mahak Kothari, Md Haider Zama, Debayan Deb, Bernardo Biesseck, Pedro Vidal, Roger Granada, Guilherme Fickel, Gustavo Fuhr, David Menotti, Alexander Unnervik, Anjith George, Christophe Ecabert, Hatef Otroshi Shahreza, Parsa Rahimi, Sebastien Marcel, Ioannis Sarridis, Christos Koutlis, Georgia Baltsou, Symeon Papadopoulos, Christos Diou, Nicolo Di Domenico, Guido Borghi, Lorenzo Pellegrini, Enrique Mas-Candela, Angela Sanchez-Perez, Andrea Atzori, Fadi Boutros, Naser Damer, Gianni Fenu, and Mirko Marras (2024). FRCSyn-onGoing: Benchmarking and comprehensive evaluation of real and synthetic data to improve face recognition systems. Information Fusion.

Pietro Melzi, Ruben Tolosana, Ruben Vera-Rodriguez, Minchul Kim, Christian Rathgeb, Xiaoming Liu, Ivan DeAndres-Tame, Aythami Morales, Julian Fierrez, Javier Ortega-Garcia, Weisong Zhao, Xiangyu Zhu, Zheyu Yan, Xiao-Yu Zhang, Jinlin Wu, Zhen Lei, Suvidha Tripathi, Mahak Kothari, Md Haider Zama, Debayan Deb, Bernardo Biesseck, Pedro Vidal, Roger Granada, Guilherme Fickel, Gustavo Fuhr, David Menotti, Alexander Unnervik, Anjith George, Christophe Ecabert, Hatef Otroshi Shahreza, Parsa Rahimi, Sebastien Marcel, Ioannis Sarridis, Christos Koutlis, Georgia Baltsou, Symeon Papadopoulos, Christos Diou, Nicolo Di Domenico, Guido Borghi, Lorenzo Pellegrini, Enrique Mas-Candela, Angela Sanchez-Perez, Andrea Atzori, Fadi Boutros, Naser Damer, Gianni Fenu, and Mirko Marras (2024). FRCSyn challenge at WACV 2024: Face recognition challenge in the era of synthetic data. Proceedings of the IEEE/CVF Winter Conference on Applications of Computer Vision.

Ioannis Sarridis, Jochen Spangenberg, Olga Papadopoulou, and Symeon Papadopoulos (2024). Mitigating Viewer Impact From Disturbing Imagery Using AI Filters: A User-Study. International Journal of Human-Computer Interaction.

Simone Fabbrizzi, Xuan Zhao, Emmanouil Krasanakis, Symeon Papadopoulos, and Eirini Ntoutsi (2024). Studying bias in visual features through the lens of optimal transport. Data Mining and Knowledge Discovery.

Stefanos-Iordanis Papadopoulos, Christos Koutlis, Symeon Papadopoulos, and Panagiotis Petrantonakis (2024). VERITE: a Robust benchmark for multimodal misinformation detection accounting for unimodal bias. International Journal of Multimedia Information Retrieval.

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Pantalona Georgia, Barachanou Anna, Loukas Nikolaos, Apostolidis Lazaros, Tsalakanidou Filareti, and Papadopoulos Symeon (2023). Online Behaviour Indicator Extraction for Enhanced Cancer Patient Management using Real-World Data. 20th International Conference on Content-based Multimedia Indexing, CBMI 2023.

Emmanouil Krasanakis, Symeon Papadopoulos, and Ioannis Kompatsiaris (2023). JGNN: Graph Neural Networks on native Java. SoftwareX.

Stefanos-Iordanis Papadopoulos, Christos Koutlis, Symeon Papadopoulos, and Panagiotis Petrantonakis (2023). Synthetic Misinformers: Generating and Combating Multimodal Misinformation. Proceedings of the 2nd ACM International Workshop on Multimedia AI against Disinformation.

Luca Cuccovillo, Bogdan Ionescu, Giorgos Kordopatis-Zilos, Symeon Papadopoulos, and Adrian Popescu (2023). MAD’23 Workshop: Multimedia AI against Disinformation. Proceedings of the 2023 ACM International Conference on Multimedia Retrieval.

Manos Schinas, Panagiotis Galopoulos, and Symeon Papadopoulos (2023). MAAM: Media Asset Annotation and Management. Proceedings of the 2023 ACM International Conference on Multimedia Retrieval.

Pantelis Dogoulis, Giorgos Kordopatis-Zilos, Ioannis Kompatsiaris, and Symeon Papadopoulos (2023). Improving Synthetically Generated Image Detection in Cross-Concept Settings. Proceedings of the 2nd ACM International Workshop on Multimedia AI against Disinformation.

Vasileios Mazaris, Symeon Papadopoulos, Adrian Popescu, and Zi Helen Huang (2023). ICMR 2023 Program Chairs Welcome Message. ICMR 2023-Proceedings of the 2023 ACM International Conference on Multimedia Retrieval.

Frederik Temmermans, Sabrina Caldwell, Symeon Papadopoulos, Fernando Pereira, and Philippe Rixhon (2023). Towards an international standard to establish trust in media production, distribution and consumption. 2023 24th International Conference on Digital Signal Processing (DSP).

Christos Koutlis, Manos Schinas, and Symeon Papadopoulos (2023). MemeTector: Enforcing deep focus for meme detection. International Journal of Multimedia Information Retrieval.

Dimitrios Giomelakis, Olga Papadopoulou, Symeon Papadopoulos, and Andreas Veglis (2023). Verification of news video content: Findings from a study of journalism students. Journalism Practice.

Giorgos Kordopatis-Zilos, Giorgos Tolias, Christos Tzelepis, Ioannis Kompatsiaris, Ioannis Patras, and Symeon Papadopoulos (2023). Self-Supervised Video Similarity Learning. Proceedings of the IEEE/CVF Conference on Computer Vision and Pattern Recognition.

Christos Koutlis, Manos Schinas, and Symeon Papadopoulos (2023). MemeFier: Dual-stage Modality Fusion for Image Meme Classification. Proceedings of the 2023 ACM International Conference on Multimedia Retrieval.

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Vasileios Iosifidis, Symeon Papadopoulos, Bodo Rosenhahn, and Eirini Ntoutsi (2023). AdaCC: cumulative cost-sensitive boosting for imbalanced classification. Knowledge and Information Systems.

Stefanos-Iordanis Papadopoulos, Christos Koutlis, Polychronis Charitidis, Symeon Papadopoulos, and Ioannis Kompatsiaris (2023). VICTOR: Visual Incompatibility Detection with Transformers and Fashion-specific contrastive pre-training. Journal of Visual Communication and Image Representation.

Asbjørn Følstad, Theo Araujo, Symeon Papadopoulos, Effie L-C Law, Ewa Luger, Morten Goodwin, and Petter Bae Brandtzaeg (2023). Chatbot Research and Design: 6th International Workshop, CONVERSATIONS 2022, Amsterdam, The Netherlands, November 22–23, 2022, Revised Selected Papers. Chatbot Research and Design.

Maria Siopi, Giorgos Kordopatis-Zilos, Polychronis Charitidis, Ioannis Kompatsiaris, and Symeon Papadopoulos (2023). A Multi-Stream Fusion Network for Image Splicing Localization. International Conference on Multimedia Modeling.

Ioannis Sarridis, Christos Koutlis, Olga Papadopoulou, and Symeon Papadopoulos (2022). Leveraging Large-scale Multimedia Datasets to Refine Content Moderation Models. 2022 IEEE Eighth International Conference on Multimedia Big Data (BigMM).

Stefanos-Iordanis Papadopoulos, Christos Koutlis, Symeon Papadopoulos, and Ioannis Kompatsiaris (2022). Multimodal Quasi-AutoRegression: Forecasting the visual popularity of new fashion products. International Journal of Multimedia Information Retrieval.

Emmanouil Krasanakis, Symeon Papadopoulos, Ioannis Kompatsiaris, and Andreas L Symeonidis (2022). pygrank: A Python package for graph node ranking. SoftwareX.

Olga Papadopoulou, Evangelia Kartsounidou, and Symeon Papadopoulos (2022). COVID-Related Misinformation Migration to BitChute and Odysee. Future Internet.

Emmanouil Krasanakis, Symeon Papadopoulos, and Ioannis Kompatsiaris (2022). Autogf: Runtime graph filter tuning for community node ranking. International Conference on Complex Networks and Their Applications.

Noémie Krack, Lidia Dutkiewicz, Emine Ozge Yildirim, Symeon Papadopoulos, Filareti Tsalakanidou, Ioannis Kompatsiaris, Anna Schjøtt Hansen, Lucile Sassatelli, Atia Cortés, Dario Garcia-Gasulla, Patrick Aichroth, Andreas Steenpass, Luca Cuccovillo, Birgit Gray, Birgit Baris Schlicht, Rasa Bocyte, Emine Yildirim, Daniel Gatica-Perez, Georgi Kostadinov, and Chris Georgiev (2022). Pilot Policy Recommendations for the use of AI in the Media Sector. Pilot Policy Recommendations for the use of AI in the Media Sector.

Giorgos Kordopatis-Zilos, Christos Tzelepis, Symeon Papadopoulos, Ioannis Kompatsiaris, and Ioannis Patras (2022). DnS: Distill-and-select for efficient and accurate video indexing and retrieval. International Journal of Computer Vision.

Simone Fabbrizzi, Symeon Papadopoulos, Eirini Ntoutsi, and Ioannis Kompatsiaris (2022). A survey on bias in visual datasets. Computer Vision and Image Understanding.

Anastasios Papazoglou Chalikias, Elias Kouslis, Orestis Sarakatsanos, Andromachi Boikou, Stefanos-Iordanis Papadopoulos, Christos Koutlis, Symeon Papadopoulos, Spiros Nikolopoulos, Ioannis Kompatsiaris, David Gavilan, Dongjoe Shin, Yu Chen, Axl François, Michaela Jauk, and Jamie Sutherland (2022). Novel Paradigms of Human-Fashion Interaction. Proceedings of the 12th Hellenic Conference on Artificial Intelligence.

Nikolaos Giatsoglou, Emmanouil Krasanakis, Symeon Papadopoulos, and Ioannis Kompatsiaris (2022). A Graph Diffusion Scheme for Decentralized Content Search based on Personalized PageRank. 2022 IEEE 42nd International Conference on Distributed Computing Systems Workshops (ICDCSW).

Spiros Baxevanakis, Giorgos Kordopatis-Zilos, Panagiotis Galopoulos, Lazaros Apostolidis, Killian Levacher, Ipek Baris Schlicht, Denis Teyssou, Ioannis Kompatsiaris, and Symeon Papadopoulos (2022). The mever deepfake detection service: Lessons learnt from developing and deploying in the wild. Proceedings of the 1st International Workshop on Multimedia AI against Disinformation.

Bogdan Ionescu, Giorgos Kordopatis-Zilos, Adrian Popescu, Luca Cuccovillo, and Symeon Papadopoulos (2022). MAD'22 Workshop: Multimedia AI against Disinformation. Proceedings of the 2022 International Conference on Multimedia Retrieval.

B Ionescu, G Kordopatis-Zilos, S Papadopoulos, A Popescu, and Luca Cuccovillo (2022). Mad'22 Workshop Chairs' Welcome Message. MAD 2022, 1st International Workshop on Multimedia AI against Disinformation. Proceedings.

Olga Papadopoulou, Themistoklis Makedas, Lazaros Apostolidis, Francesco Poldi, Symeon Papadopoulos, and Ioannis Kompatsiaris (2022). Mever networkx: Network analysis and visualization for tracing disinformation. Future Internet.

Apostolos Panagiotopoulos, Giorgos Kordopatis-Zilos, and Symeon Papadopoulos (2022). Leveraging Selective Prediction for Reliable Image Geolocation. International Conference on Multimedia Modeling.

Emmanouil Krasanakis, Symeon Papadopoulos, and Ioannis Kompatsiaris (2022). p2pgnn: A decentralized graph neural network for node classification in peer-to-peer networks. IEEE Access.

Symeon Papadopoulos, Giorgos Kordopatis-Zilos, Markos Zampoglou, and Olga Papadopoulou (2022). Dataset column: Datasets for online multimedia verification. ACM SIGMultimedia Records.

Stefanos-Iordanis Papadopoulos, Christos Koutlis, Manjunath Sudheer, Martina Pugliese, Delphine Rabiller, Symeon Papadopoulos, and Ioannis Kompatsiaris (2022). Attentive hierarchical label sharing for enhanced garment and attribute classification of fashion imagery. Recommender Systems in Fashion and Retail: Proceedings of the Third Workshop at the Recommender Systems Conference (2021).

Ioannis Sarridis, Vasiliki Gkatziaki, Emmanouil Krasanakis, Nikos Giatsoglou, Nikos Sarris, Symeon Papadopoulos, and Ioannis Kompatsiaris (2022). Helios. TALK: A decentralised messaging framework that preserves the privacy of users. Open Research Europe.

Olga Papadopoulou, and Symeon Papadopoulos (2021). MeVer team tackling Corona virus and Conspiracies using Ensemble Classification. MediaEval 2021 Workshop, MediaEval 2021.

Asbjørn Følstad, Theo Araujo, Effie Lai-Chong Law, Petter Bae Brandtzaeg, Symeon Papadopoulos, Lea Reis, Marcos Baez, Guy Laban, Patrick McAllister, Carolin Ischen, Rebecca Wald, Fabio Catania, Raphael Meyer von Wolff, Sebastian Hobert, and Ewa Luger (2021). Future directions for chatbot research: an interdisciplinary research agenda. Computing.

Ioannis Politis, Ioannis Fyrogenis, Efthymis Papadopoulos, Anastasia Nikolaidou, Eleni Verani, Lazaros Apostolidis, Symeon Papadopoulos, Maria Liatsikou, Ioannis Kompatsiaris, George Keikoglou, Konstantinos Alexiou, Nasos Chondros, Ioannis Tsampouris, Rafail Katkadigkas, Maria-Vasilia Ioannidou, and Vasilios Mplesios (2021). A holistic approach to optimize and promote Bike-Sharing Systems, through an integrated action plan. 2021 21st International Conference on Computational Science and Its Applications (ICCSA).

Giorgos Kordopatis-Zilos, Panagiotis Galopoulos, Symeon Papadopoulos, and Ioannis Kompatsiaris (2021). Leveraging efficientnet and contrastive learning for accurate global-scale location estimation. Proceedings of the 2021 International Conference on Multimedia Retrieval.

Kostas Georgiadis, Giorgos Kordopatis-Zilos, Fotis Kalaganis, Panagiotis Migkotzidis, Elisavet Chatzilari, Valasia Panakidou, Kyriakos Pantouvakis, Savvas Tortopidis, Symeon Papadopoulos, Spiros Nikolopoulos, and Ioannis Kompatsiaris (2021). Products-6K: a large-scale groceries product recognition dataset. The 14th PErvasive Technologies Related to Assistive Environments Conference.

Panagiotis Galopoulos, Chryssanthi Iakovidou, Vasiliki Gkatziaki, Symeon Papadopoulos, and Yiannis Kompatsiaris (2021). Towards a Privacy Respecting Image-based User Profiling Component. 2021 International Conference on Content-Based Multimedia Indexing (CBMI).

Polychronis Charitidis, Giorgos Kordopatis-Zilos, Symeon Papadopoulos, and Ioannis Kompatsiaris (2021). Operation-wise attention network for tampering localization fusion. 2021 International Conference on Content-Based Multimedia Indexing (CBMI).

Filareti Tsalakanidou, Symeon Papadopoulos, Vasileios Mezaris, Ioannis Kompatsiaris, Birgit Gray, Danae Tsabouraki, Maritini Kalogerini, Fulvio Negro, Maurizio Montagnuolo, Jesse De Vos, Philo Van Kemenade, Daniele Gravina, Rémi Mignot, Alexey Ozerov, Francois Schnitzler, Artur Garcia-Saez, Georgios N Yannakakis, Antonios Liapis, and Georgi Kostadinov (2021). The AI4Media project: use of next-generation artificial intelligence technologies for media sector applications. Artificial Intelligence Applications and Innovations: 17th IFIP WG 12.5 International Conference, AIAI 2021, Hersonissos, Crete, Greece, June 25–27, 2021, Proceedings 17.

Maria Liatsikou, Symeon Papadopoulos, Lazaros Apostolidis, and Ioannis Kompatsiaris (2021). A Denoising Hybrid Model for Anomaly Detection in Trajectory Sequences.. EDBT/ICDT Workshops.

Asbjørn Følstad, Theo Araujo, Symeon Papadopoulos, Effie L-C Law, Ewa Luger, Morten Goodwin, and Petter Bae Brandtzaeg (2021). Chatbot Research and Design: 4th International Workshop, CONVERSATIONS 2020, Virtual Event, November 23–24, 2020, Revised Selected Papers. Springer Nature.

P. Avgoustinakis, G. Kordopatis-Zilos, S. Papadopoulos, A. L. Symeonidis, and I. Kompatsiaris (2021). Audio-based Near-Duplicate Video Retrieval with Audio Similarity Learning. In Proceedings of the IEEE International Conference on Pattern Recognition..

Emmanouil Krasanakis, Symeon Papadopoulos, and Ioannis Kompatsiaris (2021). Applying fairness constraints on graph node ranks under personalization bias. Complex Networks & Their Applications IX: Volume 2, Proceedings of the Ninth International Conference on Complex Networks and Their Applications COMPLEX NETWORKS 2020.

O. Papadopoulou, G. Kordopatis-Zilos, and S. Papadopoulos (2020). MeVer team tackling Coronavirus and 5G conspiracy using ensemble classification based on BERT. In Proceedings of the MediaEval 2020..

Emmanouil Krasanakis, Symeon Papadopoulos, and Ioannis Kompatsiaris (2020). Stopping personalized PageRank without an error tolerance parameter. 2020 IEEE/ACM International Conference on Advances in Social Networks Analysis and Mining (ASONAM).

Christos Koutlis, Symeon Papadopoulos, Manos Schinas, and Ioannis Kompatsiaris (2020). LAVARNET: Neural network modeling of causal variable relationships for multivariate time series forecasting. Applied Soft Computing.

P. Charitidis, G. Kordopatis-Zilos, S. Papadopoulos, and Y. Kompatsiaris (2020). Investigating the Impact of Pre-processing and Prediction Aggregation on the DeepFake Detection Task. In Proceedings of the Conference for Truth and Trust Online..

Lazaros Apostolidis, Symeon Papadopoulos, Maria Liatsikou, Ioannis Fyrogenis, Efthymis Papadopoulos, George Keikoglou, Konstantinos Alexiou, Nasos Chondros, Ioannis Kompatsiaris, and Ioannis Politis (2020). i-CHANGE: A platform for managing dockless bike sharing systems. Computational Science and Its Applications–ICCSA 2020: 20th International Conference, Cagliari, Italy, July 1–4, 2020, Proceedings, Part II 20.

Emmanouil Krasanakis, Symeon Papadopoulos, and Yiannis Kompatsiaris (2020). Unsupervised evaluation of multiple node ranks by reconstructing local structures. Applied Network Science.

Christos Koutlis, Manos Schinas, Symeon Papadopoulos, and Ioannis Kompatsiaris (2020). GAP: Geometric Aggregation of Popularity Metrics. Information.

Z. Marinova, J. Spangenberg, D. Teyssou, S. Papadopoulos, N. Sarris, A. Alaphilippe, and K. Bontcheva (2020). Weverify: Wider and Enhanced Verification for You Project Overview and Tools. In 2020 IEEE International Conference on Multimedia & Expo Workshops (ICMEW) (pp. 1-4). IEEE..

C. Iakovidou, S. Papadopoulos, and I. Kompatsiaris (2020). Knowledge-Based Fusion for Image Tampering Localization. In IFIP International Conference on Artificial Intelligence Applications and Innovations (pp. 177-188). Springer, Cham..

Emmanouil Krasanakis, Emmanouil Schinas, Symeon Papadopoulos, Yiannis Kompatsiaris, and Andreas Symeonidis (2020). Boosted seed oversampling for local community ranking. Information Processing & Management.

E. Ntoutsi, P. Fafalios, U. Gadiraju, V. Iosifidis, W. Nejdl, M.E. Vidal, S. Ruggieri, F. Turini, S. Papadopoulos, Emmanouil Krasanakis, and I. Kompatsiaris (2020). Bias in data‐driven artificial intelligence systems—An introductory survey. Wiley Interdisciplinary Reviews: Data Mining and Knowledge Discovery, 10(3), e1356..

Chryssanthi Iakovidou, Panagiotis Galopoulos, Symeon Papadopoulos, Yiannis Kompatsiaris, Barbara Guidi, Andrea Michienzi, Laura Ricci, Fabrizio Baiardi, Pau Pamplona, Estella Oncins, and Rolf Nyffenegger (2020). Mining the social graph. HELIOS.

Emmanouil Krasanakis, Symeon Papadopoulos, and Yiannis Kompatsiaris (2020). LinkAUC: unsupervised evaluation of multiple network node ranks using link prediction. Complex Networks and Their Applications VIII: Volume 1 Proceedings of the Eighth International Conference on Complex Networks and Their Applications COMPLEX NETWORKS 2019 8.

Panagiotis Galopoulos, Chryssanthi Iakovidou, Symeon Papadopoulos, Yiannis Kompatsiaris, Kristina Kapanova, Barbara Guidi, Andrea Michienzi, and Laura Ricci (2020). Development of content-aware social graphs. HELIOS.

Asbjørn Følstad, Theo Araujo, Symeon Papadopoulos, Effie Lai-Chong Law, Ole-Christoffer Granmo, Ewa Luger, and Petter Bae Brandtzaeg (2020). Chatbot Research and Design: Third International Workshop, CONVERSATIONS 2019, Amsterdam, The Netherlands, November 19-20, 2019, Revised Selected Papers. Information Systems. Springer.

Asbjørn Følstad, Theo Araujo, Symeon Papadopoulos, Effie Lai-Chong Law, Ole-Christoffer Granmo, Ewa Luger, and Petter Bae Brandtzaeg (2020). Chatbot research and design. Springer International Publishing.

Christos Koutlis, Manos Schinas, Vasiliki Gkatziaki, Symeon Papadopoulos, and Yiannis Kompatsiaris (2019). Data-Driven Song Recognition Estimation Using Collective Memory Dynamics Models. ISMIR.

G. Kordopatis-Zilos, S. Papadopoulos, I. Patras, and I. Kompatsiaris (2019). ViSiL: Fine-grained Spatio-Temporal Video Similarity Learning. In Proceedings of the IEEE International Conference on Computer Vision (pp. 6351-6360).

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Polychronis Charitidis, Symeon Papadopoulos, Lazaros Apostolidis, and Ioannis Kompatsiaris (2019). Social media monitoring tools for air quality accounts. IEEE/WIC/ACM International Conference on Web Intelligence-Companion Volume.

Barbara Guidi, Andrea Michienzi, Laura Ricci, Chrysanthi Iakovidou, and Symeon Papadopoulos (2019). Define a time-dependent social graph. Networks.

O. Papadopoulou, M. Zampoglou, S. Papadopoulos, and I. Kompatsiaris (2019). Verification of Web Videos Through Analysis of Their Online Context. In book “Video Verification in the Fake News Era”, V. Mezaris, L. Nixon, S. Papadopoulos, D. Teyssou (Eds.), pp 191-221, Springer, 2019. DOI:10.1007⁄978-3-030-26752-0_7.

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F. Markatopoulou, M. Zampoglou, E. Apostolidis, S. Papadopoulos, V. Mezaris, I. Patras, and I. Kompatsiaris (2019). Finding Semantically Related Videos in Closed Collections. In book ‘Video Verification in the Fake News Era’, V. Mezaris, L. Nixon, S. Papadopoulos, D. Teyssou (Eds.), pp. 127-159, Springer, 2019. DOI:10.1007 / 978-3-030-26752-0_5.

G. Mercier, F. Markatopoulou, R. Cozien, M. Zampoglou, E. Apostolidis, A. Metsai, S. Papadopoulos, V. Mezaris, I. Patras, and I. Kompatsiaris (2019). Detecting Manipulations in Video. In book “Video Verification in the Fake News Era”, V. Mezaris, L. Nixon, S. Papadopoulos, D. Teyssou (Eds.), pp. 161-189, Springer, 2019. DOI:10.1007 / 978-3-030-26752-0_6.

G. Kordopatis-Zilos, S. Papadopoulos, I. Patras, and I. Patras (2019). Finding Near-Duplicate Videos in Large-Scale Collections. In Video Verification in the Fake News Era (pp. 91-126), Springer, 2019. DOI: 10.1007⁄978-3-030-26752-0_4.

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Thomas Lidy, Adrian Lecoutre, Khalil Boulkenafet, Manos Schinas, Christos Koutlis, Symeon Papadopoulos, and Polychronis Charitidis (2019). D3. 2–Predictive analytics and recommendation framework v2. Proceedings of the IEEE/CVF international conference on computer vision.

Giorgos Kordopatis-Zilos, Symeon Papadopoulos, Ioannis Patras, and Ioannis Kompatsiaris (2019). Visil Fine-grained spatio-temporal video similarity learning. Proceedings of the IEEE/CVF international conference on computer vision.

Vasileios Mezaris, Lyndon Nixon, Symeon Papadopoulos, and Denis Teyssou (2019). Video verification in the fake news era. Springer.

Barbara Guidi, Andrea Michienzi, Chrysanthi Iakovidou, Symeon Papadopoulos, Kristina Kapanova, Kylänpää Markku, and Kuusijärvi Jarkko (2019). Heterogeneous Social Network Graph topology and lifecycle. Helios.

O. Papadopoulou, D. Giomelakis, L. Apostolidis, S. Papadopoulos, and I. Kompatsiaris (2019). Context Aggregation and Analysis: A Tool for User-Generated Video Verification. In ROME: Workshop on Reducing Online Misinformation Exposure - colocated with SIGIR 2019.

O. Papadopoulou, G. Kordopatis-Zilos, M. Zampoglou, S. Papadopoulos, and I. Kompatsiaris (2019). Hyperpartisan News Detection. In Proceedings of the 13th International Workshop on Semantic Evaluation (pp. 924-928).

Olga Papadopoulou, Giorgos Kordopatis-Zilos, Markos Zampoglou, Symeon Papadopoulos, and Yiannis Kompatsiaris (2019). Brenda starr at SemEval-2019 task 4: hyperpartisan news detection. Proceedings of the 13th International Workshop on Semantic Evaluation.

Asbjorn Folstad, Symeon Papadopoulos, Ole-Christoffer Granmo, Effie L-C Law, Ewa Luger, and Petter Bae Brandtzaeg (2019). Preface for CONVERSATIONS 2018-2nd International Workshop on Chatbot Research. Internet Science: INSCI 2018 International Workshops, St. Petersburg, Russia, October 24–26, 2018, Revised Selected Papers.

G. Kordopatis-Zilos, S. Papadopoulos, I. Patras, and I. Kompatsiaris (2019). FIVR: Fine-grained incident video retrieval. IEEE Transactions on Multimedia, 21(10), 2638-2652..

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O. Papadopoulou, M. Zampoglou, S. Papadopoulos, and I. Kompatsiaris (2019). A Corpus of Debunked and Verified User-Generated Videos. Online Information Review, Feb. 2019.

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M. Zampoglou, F. Markatopoulou, G. Mercier, D. Touska, E. Apostolidis, S. Papadopoulos, R. Cozien, I. Patras, V. Mezaris, and I. Kompatsiaris (2019). Detecting tampered videos with multimedia forensics and deep learning. Proc. 25th Int. Conf. on Multimedia Modeling (MMM2019), Thessaloniki, Greece, Springer LNCS vol. 11295, pp. 361-373, Jan. 2019.

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Adam Tsakalidis, Symeon Papadopoulos, Rania Voskaki, Kyriaki Ioannidou, Christina Boididou, Alexandra I Cristea, Maria Liakata, and Yiannis Kompatsiaris (2018). Building and evaluating resources for sentiment analysis in the Greek language. Language resources and evaluation.

Sonja Zillner, Jon Ander Gomez, Ana García Robles, Edward Curry, Caj Södergård, Nozha Boujemaa, Andreas Metzger, Zoheir Sabeur, Martin Kaltenböck, Thomas Hahn, Marija Despenic, Natalie Bertels, Ivo Emanuilov, Simon Scerri, Andrejs Vasiljevs, Tatjana Gornosttaja, Axel Ngongo, Freek Bomhof, Yannis Kompatasiaris, Symeon Papadopoulos, Juan-Carlos Perez-Cortes, Oscar Lázaro, and Aitor Amáiz (2018). Data-driven artificial intelligence for european economic competitiveness and societal progress: BDVA position statement, November 2018.

Emmanouil Krasanakis, Emmanouil Schinas, Symeon Papadopoulos, Yiannis Kompatsiaris, and Pericles Mitkas (2018). VenueRank: Identifying Venues that Contribute to Artist Popularity. 19th International Society for Music Information Retrieval Conference (ISMIR 2018), Paris, France.

Eleftherios Spyromitros-Xioufis, Anastasia Moumtzidou, Symeon Papadopoulos, Stefanos Vrochidis, Yiannis Kompatsiaris, Aristeidis K Georgoulias, Georgia Alexandri, and Konstantinos Kourtidis (2018). Towards improved air quality monitoring using publicly available sky images. Multimedia Tools and Applications for Environmental & Biodiversity Informatics.

S. E. Middleton, G. Kordopatis-Zilos, S. Papadopoulos, and I. Kompatsiaris (2018). Location extraction from social media: Geoparsing, location disambiguation, and geotagging. ACM Transactions on Information Systems (TOIS), 36(4), 40.

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Christina Boididou, Stuart E Middleton, Zhiwei Jin, Symeon Papadopoulos, Duc-Tien Dang-Nguyen, Giulia Boato, and Yiannis Kompatsiaris (2018). Verifying information with multimedia content on twitter: a comparative study of automated approaches. Multimedia tools and applications.

Polychronis Charitidis, Eleftherios Spyromitros-Xioufis, Symeon Papadopoulos, and Yiannis Kompatsiaris (2018). Twitter-based sensing of city-level air quality. 2018 IEEE 13th Image, Video, and Multidimensional Signal Processing Workshop (IVMSP).

Evangelos Kosmidis, Panagiota Syropoulou, Stavros Tekes, Philipp Schneider, Eleftherios Spyromitros-Xioufis, Marina Riga, Polychronis Charitidis, Anastasia Moumtzidou, Symeon Papadopoulos, Stefanos Vrochidis, Ioannis Kompatsiaris, Ilias Stavrakas, George Hloupis, Andronikos Loukidis, Konstantinos Kourtidis, Aristeidis K Georgoulias, and Georgia Alexandri (2018). hackAIR: Towards raising awareness about air quality in Europe by developing a collective online platform. ISPRS International Journal of Geo-Information.

C. Iakovidou, M. Zampoglou, S. Papadopoulos, and I. Kompatsiaris (2018). Content-aware Detection of JPEG Grid Inconsistencies for Intuitive Image Forensics. Journal of Visual Communication and Image Representation, Volume 54, Jul. 2018, Pages 155-170, Elsevier 2018.

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Vasiliki Gkatziaki, Symeon Papadopoulos, Richard Mills, Sotiris Diplaris, Ioannis Tsampoulatidis, and Ioannis Kompatsiaris (2018). easIE: Easy-to-use information extraction for constructing CSR databases from the web. ACM Transactions on Internet Technology (TOIT).

Emmanouil Krasanakis, Eleftherios Spyromitros-Xioufis, Symeon Papadopoulos, and Yiannis Kompatsiaris (2018). Adaptive sensitive reweighting to mitigate bias in fairness-aware classification. Proceedings of the 2018 world wide web conference.

C. Boididou, S. E. Middleton, Z. Jin, S. Papadopoulos, D.-T. Dang-Nguyen, G. Boato, and I. Kompatsiaris (2018). Verifying information with multimedia content on Twitter. Multimedia Tools and Applications, Mar. 2018, Pages 1-27, Springer 2017.

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C. Boididou, S. Papadopoulos, M. Zampoglou, L. Apostolidis, O. Papadopoulou, and I. Kompatsiaris (2018). Detection and visualization of misleading content on Twitter. International Journal of Multimedia Information Retrieval, Mar. 2018, Volume 7, Issue 1, Pages 71–86, Springer 2017.

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George Kalpakis, Theodora Tsikrika, Ilias Gialampoukidis, Symeon Papadopoulos, Stefanos Vrochidis, and Ioannis Kompatsiaris (2018). Analysis of suspended terrorism-related content on social media. Community-oriented policing and technological innovations.

S. E. Middleton, S. Papadopoulos, and I. Kompatsiaris (2018). Social computing for verifying social media content in breaking news. IEEE Internet Computing, 22(2), 83-89.

Vasiliki Gkatziaki, Symeon Papadopoulos, Sotiris Diplaris, and Ioannis Kompatsiaris (2017). Large-scale open corporate data collection and analysis as an enabler of corporate social responsibility research. Internet Science: 4th International Conference, INSCI 2017, Thessaloniki, Greece, November 22-24, 2017, Proceedings 4.

Maria Vogiatzi, Christodoulos Keratidis, Manos Schinas, Sotiris Diplaris, Serdar Yümlü, Paula Forbes, Symeon Papadopoulos, Panagiota Syropoulou, Lazaros Apostolidis, Ioannis Kompatsiaris, and Machi Symeonidou (2017). The step project: Societal and political engagement of young people in environmental issues. Internet Science: 4th International Conference, INSCI 2017, Thessaloniki, Greece, November 22-24, 2017, Proceedings 4.

Manos Schinas, Symeon Papadopoulos, Lazaros Apostolidis, Yiannis Kompatsiaris, and Pericles A Mitkas (2017). Open-source monitoring, search and analytics over social media. Internet Science: 4th International Conference, INSCI 2017, Thessaloniki, Greece, November 22-24, 2017, Proceedings 4.

D. Teyssou, J.-M. Leung, E. Apostolidis, K. Apostolidis, S. Papadopoulos, M. Zampoglou, O. Papadopoulou, and V. Mezaris (2017). The InVID Plug-in:Web Video Verification on the Browser. 1st International Workshop on Multimedia Verification at the ACM Multimedia Conference, Mountain View, CA, USA, Oct. 2017.

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G. Kordopatis-Zilos, S. Papadopoulos, I. Patras, and I. Kompatsiaris (2017). Near-Duplicate Video Retrieval with Deep Metric Learning. 5th Workshop on Web-scale Vision and Social Media (ICCV 2017), Venice, Italy, Oct. 2017.

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V. Mezaris, L. Nixon, S. Papadopoulos, and J. Spangenberg (2017). MuVer17 – First International Workshop on Multimedia Verification. Proc. ACM Multimedia 2017, Mountain View, CA, USA, Oct. 2017.

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Emmanouil Krasanakis, Eleftherios Spyromitros-Xioufis, Symeon Papadopoulos, and Yiannis Kompatsiaris (2017). Tunable plug-in rules with reduced posterior certainty loss in imbalanced datasets. First International Workshop on Learning with Imbalanced Domains: Theory and Applications.

Bo Wang, Maria Liakata, Adam Tsakalidis, Agelos Georgakopoulos, Orestis Papadopoulos, Lazaros Apostolidis, Arkaitz Zubiaga, Rob Procter, and Yiannis Kompatsiaris (2017). TOTEMSS: Topic-based, temporal sentiment summarisation for Twitter. Proceedings of the IJCNLP 2017.

Stelios Andreadis, Ilias Gialampoukidis, George Kalpakis, Theodora Tsikrika, Symeon Papadopoulos, Stefanos Vrochidis, and Ioannis Kompatsiaris (2017). A monitoring tool for terrorism-related key-players and key-communities in social media networks. 2017 European Intelligence and Security Informatics Conference (EISIC).

G. Kordopatis-Zilos, S. Papadopoulos, and I. Kompatsiaris (2017). Geotagging text content with language models and feature mining. Proceedings of the IEEE, 105(10), 1971-1986.

O. Papadopoulou, M. Zampoglou, S. Papadopoulos, and I. Kompatsiaris (2017). Web Video Verification using Contextual Cues. 2nd International Workshop on Multimedia Forensics and Security (MFSec), co-located with the ACM International Conference on Multimedia Retrieval (ICMR) 2017, Bucharest, Romania, Jun. 2017.

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C. Boididou, S. Papadopoulos, L. Apostolidis, and I. Kompatsiaris (2017). Learning to Detect Misleading Content on Twitter.. ACM International Conference on Multimedia Retrieval (ICMR) 2017, Bucharest, Romania, Jun. 2017.

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Ilias Gialampoukidis, George Kalpakis, Theodora Tsikrika, Symeon Papadopoulos, Stefanos Vrochidis, and Ioannis Kompatsiaris (2017). Detection of terrorism-related twitter communities using centrality scores. Proceedings of the 2nd international workshop on multimedia forensics and security.

Dimitrios Ververidis, Spiros Nikolopoulos, Symeon Papadopoulos, and Ioannis Kompatsiaris (2017). Reality Mining in Urban Spaces by Using Citizens as Living Sensors. Network Design and Optimization for Smart Cities.

Georgios Petkos, Manos Schinas, Symeon Papadopoulos, and Yiannis Kompatsiaris (2017). Graph-based multimodal clustering for social multimedia. Multimedia Tools and Applications.

G. Rizos, S. Papadopoulos, and I. Kompatsiaris (2017). Multilabel user classification using the community structure of online networks. PloS one, 12(3), e0173347.

K. Konstantinidis, S. Papadopoulos, and I. Kompatsiaris (2017). Exploring Twitter communication dynamics with evolving community analysis. PeerJ Computer Science, 3, e107.

M. Zampoglou, S. Papadopoulos, and I. Kompatsiaris (2017). Large-scale evaluation of splicing localization algorithms for web images. Multimedia Tools and Applications, 76(4), 4801-4834.

G. Kordopatis-Zilos, S. Papadopoulos, I. Patras, and I. Kompatsiaris (2017). Near-Duplicate Video Retrieval by Aggregating Intermediate CNN Layers. Proc. 23rd Int. Conf. on MultiMedia Modeling (MMM’17), Reykjavik, Iceland, Jan. 2017.

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Markos Zampoglou, Symeon Papadopoulos, Yiannis Kompatsiaris, and Jochen Spangenberg (2016). A web-based service for disturbing image detection. International Conference on Multimedia Modeling.

G. Kordopatis-Zilos, A. Popescu, S. Papadopoulos, and I. Kompatsiaris (2016). Placing Images with Refined Language Models and Similarity Search with PCA-reduced VGG Features. In MediaEval 2016.

C. Boididou, S. E. Middleton, S. Papadopoulos, D. Nguyen, D. Tien, M. Riegler, and I. Kompatsiaris (2016). The VMU participation @ verifying multimedia use 2016. In MediaEval 2016.

G. Kordopatis-Zilos, S. Papadopoulos, and I. Kompatsiaris (2016). In-depth exploration of geotagging performance using sampling strategies on yfcc100m. In Proceedings of the 2016 ACM Workshop on Multimedia COMMONS (pp. 3-10). ACM.

Gerald Friedland, Symeon Papadopoulos, Julia Bernd, and Yiannis Kompatsiaris (2016). Multimedia privacy. Proceedings of the 24th ACM international conference on Multimedia.

Eleftherios Spyromitros-Xioufis, Georgios Petkos, Symeon Papadopoulos, Rob Heyman, and Yiannis Kompatsiaris (2016). Perceived versus actual predictability of personal information in social networks. Internet Science: Third International Conference, INSCI 2016, Florence, Italy, September 12-14, 2016, Proceedings 3.

Richard Mills, Stefano De Paoli, Sotiris Diplaris, Vasiliki Gkatziaki, Symeon Papadopoulos, Srivigneshwar R Prasad, Ethan McCutchen, Vishal Kapadia, and Philipp Hirche (2016). WikiRate. org–Leveraging collective awareness to understand companies’ environmental, social and governance performance. Internet Science: Third International Conference, INSCI 2016, Florence, Italy, September 12-14, 2016, Proceedings 3.

Anastasia Moumtzidou, Symeon Papadopoulos, Stefanos Vrochidis, Ioannis Kompatsiaris, Konstantinos Kourtidis, George Hloupis, Ilias Stavrakas, Konstantina Papachristopoulou, and Christodoulos Keratidis (2016). Towards air quality estimation using collected multimodal environmental data. Collective Online Platforms for Financial and Environmental Awareness: First International Workshop on the Internet for Financial Collective Awareness and Intelligence, IFIN 2016 and First International Workshop on Internet and Social Media for Environmental Monitoring, ISEM 2016, Florence, Italy, September 12, 2016, Revised Selected Papers 1.

Anna Satsiou, Georgios Panos, Ioannis Praggidis, Stefanos Vrochidis, Symeon Papadopoulos, Christodoulos Keratidis, Panagiota Syropoulou, and Hai-Ying Liu (2016). Collective Online Platforms for Financial and Environmental Awareness. First International Workshop on Internet and Social Media for Environmental Monitoring, ISEM 2016.

M. Zampoglou, S. Papadopoulos, Y. Kompatsiaris, R. Bouwmeester, and J. Spangenberg (2016). Web and social media image forensics for news professionals. In Tenth International AAAI Conference on Web and Social Media.

Eleftherios Spyromitros-Xioufis, Symeon Papadopoulos, Adrian Popescu, and Yiannis Kompatsiaris (2016). Personalized privacy-aware image classification. Proceedings of the 2016 ACM on international conference on multimedia retrieval.

Manos Schinas, Symeon Papadopoulos, Georgios Petkos, Yiannis Kompatsiaris, and Pericles A Mitkas (2016). Multimodal event detection and summarization in large scale image collections. Proceedings of the 2016 ACM on International Conference on Multimedia Retrieval.

S. Papadopoulos, K. Bontcheva, E. Jaho, M. Lupu, and C. Castillo (2016). Overview of the special issue on trust and veracity of information in social media. ACM Transactions on Information Systems (TOIS), 34(3), 14.

Georgios Rizos, Symeon Papadopoulos, and Yiannis Kompatsiaris (2016). Predicting news popularity by mining online discussions. Proceedings of the 25th international conference companion on world wide web.

Adrian Popescu, Mireille Hildebrandt, Jonas Breuer, Laurence Claeys, Symeon Papadopoulos, Georgios Petkos, Theodoros Michalareas, David Lund, Rob Heyman, Shenja van der Graaf, Etienne Gadeski, Hervé Le Borgne, K deVries, Timotheos Kastrinogiannis, Apostolos Kousaridas, and Ali Padyab (2016). Increasing transparency and privacy for online social network users–USEMP value model, scoring framework and legal. Privacy Technologies and Policy: Third Annual Privacy Forum, APF 2015, Luxembourg, Luxembourg, October 7-8, 2015, Revised Selected Papers 3.

Manos Schinas, Symeon Papadopoulos, Yiannis Kompatsiaris, and Pericles A Mitkas (2016). Mgraph: multimodal event summarization in social media using topic models and graph-based ranking. International Journal of Multimedia Information Retrieval.

Theodora Tsikrika, Symeon Papadopoulos, Stefanos Vrochidis, and Yiannis Kompatsiaris (2016). 10th European Summer School in Information Retrieval (ESSIR 2015). ACM SIGIR Forum.

Adrian Popescu, Eleftherios Spyromitros-Xioufis, Symeon Papadopoulos, Hervé Le Borgne, and Ioannis Kompatsiaris (2015). Toward an automatic evaluation of retrieval performance with large scale image collections. Proceedings of the 2015 Workshop on Community-Organized Multimodal Mining: Opportunities for Novel Solutions.

Georgios Paliouras, Symeon Papadopoulos, and Dimitrios Vogiatzis (2015). Discovery of complex user communities. User Community Discovery.

Georgios Paliouras, Symeon Papadopoulos, Dimitrios Vogiatzis, and Yiannis Kompatsiaris (2015). User Community Discovery. Human-Computer Interaction Series.

Manos Schinas, Symeon Papadopoulos, Georgios Petkos, Yiannis Kompatsiaris, and Pericles A Mitkas (2015). Multimodal graph-based event detection and summarization in social media streams. Proceedings of the 23rd ACM international conference on Multimedia.

Sándor Darányi, Peter Wittek, K Konstantinidis, and S Papadopoulos (2015). A Potential Surface Underlying Meaning. Yandex School of Data Analysis Conference, Machine Learning: Prospects and Applications.

George Mourikas, Symeon Papadopoulos, Georgios Petkos, Yiannis Kompatsiaris, Tom Seymoens, Adrian Popescu, Katja De Vries, Mireille Hildebrandt, Ali Padyab, Theodoros Michalareas, Andreas Drakos, and Alexandru Ginsca (2015). Report on Standardisation and Dissemination-v2. User USEMP.

C. Boididou, K. Andreadou, S. Papadopoulos, D. T. Dang-Nguyen, G. Boato, M. Riegler, and I. Kompatsiaris (2015). Verifying Multimedia Use at MediaEval 2015. In MediaEval 2015.

C. Boididou, S. Papadopoulos, D. T. Dang-Nguyen, G. Boato, and I. Kompatsiaris (2015). The CERTH-UNITN Participation@ Verifying Multimedia Use 2015. In MediaEval 2015.

G. Kordopatis-Zilos, A. Popescu, S. Papadopoulos, and I. Kompatsiaris (2015). CERTH/CEA LIST at MediaEval Placing Task 2015. In MediaEval 2015.

Eleftherios Spyromitros-Xioufis, Adrian Popescu, Symeon Papadopoulos, and I Kompatsiaris (2015). Usemp: Finding diverse images at mediaeval 2015. Multimedia Benchmark Workshop, MediaEval 2015.

Georgios Petkos, Symeon Papadopoulos, and Yiannis Kompatsiaris (2015). Social circle discovery in ego-networks by mining the latent structure of user connections and profile attributes. Proceedings of the 2015 IEEE/ACM International Conference on Advances in Social Networks Analysis and Mining 2015.

Georgios Petkos, Symeon Papadopoulos, and Yiannis Kompatsiaris (2015). PScore: a framework for enhancing privacy awareness in online social networks. 2015 10th International conference on availability, reliability and security.

Symeon Papadopoulos, Pablo Cesar, David A Shamma, Aisling Kelliher, and Ramesh Jain (2015). Social Multimedia and Storytelling (Guest editors' introduction). IEEE MultiMedia.

M. Zampoglou, S. Papadopoulos, and I. Kompatsiaris (2015). Detecting image splicing in the wild (web). In 2015 IEEE International Conference on Multimedia & Expo Workshops (ICMEW) (pp. 1-6). IEEE..

Manos Schinas, Symeon Papadopoulos, Yiannis Kompatsiaris, and Pericles A Mitkas (2015). Visual event summarization on social media using topic modelling and graph-based ranking algorithms. Proceedings of the 5th ACM on International Conference on Multimedia Retrieval.

Eleftherios Spyromitros-Xioufis, Symeon Papadopoulos, Alexandru Lucian Ginsca, Adrian Popescu, Yiannis Kompatsiaris, and Ioannis Vlahavas (2015). Improving diversity in image search via supervised relevance scoring. Proceedings of the 5th ACM on International Conference on Multimedia Retrieval.

Katerina Andreadou, Symeon Papadopoulos, and Yiannis Kompatsiaris (2015). Web image size prediction for efficient focused image crawling. 2015 13th International Workshop on Content-Based Multimedia Indexing (CBMI).

Katerina Iliakopoulou, Symeon Papadopoulos, and Yiannis Kompatsiaris (2015). News-oriented multimedia search over multiple social networks. 2015 13th International Workshop on Content-Based Multimedia Indexing (CBMI).

Eleni Mantziou, Symeon Papadopoulos, and Yiannis Kompatsiaris (2015). Learning to detect concepts with Approximate Laplacian Eigenmaps in large-scale and online settings. International Journal of Multimedia Information Retrieval.

K. Andreadou, S. Papadopoulos, L. Apostolidis, A. Krithara, and I. Kompatsiaris (2015). Media REVEALr A social multimedia monitoring and intelligence system for web multimedia verification. In Pacific-Asia Workshop on Intelligence and Security Informatics (pp. 1-20). Springer..

G. Kordopatis-Zilos, S. Papadopoulos, and I. Kompatsiaris (2015). Geotagging social media content with a refined language modelling approach. In Pacific-Asia Workshop on Intelligence and Security Informatics (pp. 21-40). Springer, Cham..

Thomas Theodoridis, Symeon Papadopoulos, and Yiannis Kompatsiaris (2015). Assessing the reliability of facebook user profiling. Proceedings of the 24th International Conference on World Wide Web.

Adam Tsakalidis, Symeon Papadopoulos, Alexandra I Cristea, and Yiannis Kompatsiaris (2015). Predicting elections for multiple countries using Twitter and polls. IEEE Intelligent Systems.

Theodora Tsikrika, Katerina Andreadou, Anastasia Moumtzidou, Emmanouil Schinas, Symeon Papadopoulos, Stefanos Vrochidis, and Ioannis Kompatsiaris (2015). A unified model for socially interconnected multimedia-enriched objects. MultiMedia Modeling: 21st International Conference, MMM 2015, Sydney, NSW, Australia, January 5-7, 2015, Proceedings, Part I 21.

Apostolos Kousaridas, Timotheos Kastrinogiannis, Symeon Papadopoulos, Adrian Popescu, Tom Seymoens, Marita Holst, Mireille Hildebrandt, and George Mourikas (2014). D9. 3-Market Analysis. USEMP.

G. Kordopatis-Zilos, G. Orfanidis, S. Papadopoulos,, and I. Kompatsiaris (2014). SocialSensor at MediaEval Placing Task 2014. In MediaEval 2014.

Georgios Petkos, Symeon Papadopoulos, Vasileios Mezaris, and Yiannis Kompatsiaris (2014). Social Event Detection at MediaEval 2014: Challenges, Datasets, and Evaluation. MediaEval.

Tom Seymoens, George Mourikas, Apostolos Kousaridas, Adrian Popescu, Symeon Papadopoulos, and Yiannis Kompatsiaris (2014). D9. 2-Report on Standardisation and Dissemination-v1. USEMP.

Adam Tsakalidis, Symeon Papadopoulos, and Ioannis Kompatsiaris (2014). An ensemble model for cross-domain polarity classification on twitter. Web Information Systems Engineering–WISE 2014: 15th International Conference, Thessaloniki, Greece, October 12-14, 2014, Proceedings, Part II 15.

Adrian Popescu, Symeon Papadopoulos, and Ioannis Kompatsiaris (2014). USEMP at MediaEval Placing Task 2014. Proc. Proceedings of Mediaeval 2014.

Eleftherios Spyromitros-Xioufis, Symeon Papadopoulos, Yiannis Kompatsiaris, and Ioannis Vlahavas (2014). SocialSensor: Finding Diverse Images at MediaEval 2014. Proceedings of Mediaeval 2014.

Marina Riga, Georgios Petkos, Symeon Papadopoulos, Emmanouil Schinas, and Yiannis Kompatsiaris (2014). CERTH@ MediaEval 2014 Social Event Detection Task. Proceedings of Mediaeval 2014.

Sotirios Beis, Symeon Papadopoulos, and Yiannis Kompatsiaris (2014). Benchmarking graph databases on the problem of community detection. New Trends in Database and Information Systems II.

Eleftherios Spyromitros-Xioufis, Symeon Papadopoulos, Ioannis Yiannis Kompatsiaris, Grigorios Tsoumakas, and Ioannis Vlahavas (2014). A comprehensive study over VLAD and product quantization in large-scale image retrieval. IEEE Transactions on Multimedia.

Georgios Petkos, Symeon Papadopoulos, Luca Aiello, Ryan Skraba, and Yiannis Kompatsiaris (2014). A soft frequent pattern mining approach for textual topic detection. Proceedings of the 4th international conference on web intelligence, mining and semantics (WIMS14).

Christos Zigkolis, Symeon Papadopoulos, George Filippou, Yiannis Kompatsiaris, and Athena Vakali (2014). Collaborative event annotation in tagged photo collections. Multimedia Tools and Applications.

Symeon Papadopoulos, and Yiannis Kompatsiaris (2014). Social multimedia crawling for mining and search. Computer.

Georgios Petkos, Symeon Papadopoulos, and Yiannis Kompatsiaris (2014). Two-level Message Clustering for Topic Detection in Twitter. SNOW-DC@ WWW.

Symeon Papadopoulos, David PA Corney, and Luca Maria Aiello (2014). SNOW 2014 Data Challenge: Assessing the Performance of News Topic Detection Methods in Social Media. Snow-dc@ www.

C. Boididou, S. Papadopoulos, I. Kompatsiaris, S. Schifferes, and N. Newman (2014). Challenges of computational verification in social multimedia. In Proceedings of the 23rd International Conference on World Wide Web (pp. 743-748). ACM.

Emmanouil Schinas, Symeon Papadopoulos, Periklis Mitkas, and Yiannis Kompatsiaris (2014). StreamGrid. Proceedings of the 1st International Workshop on Social Multimedia and Storytelling (SoMuS 2014).

Symeon Papadopoulos, Pablo Cesar, David A Shamma, Aisling Kelliher, and Ramesh Jain (2014). SoMuS: Social Multimedia and Storytelling. Proc. First Int’l Workshop Social Multimedia and Storytelling.

Ioannis Kompatsiaris, Sotiris Diplaris, and Symeon Papadopoulos (2014). Social Data and Multimedia Analytics for News and Events Applications. EDBT/ICDT Workshops.

Timo Reuter, Symeon Papadopoulos, Vasilios Mezaris, and Philipp Cimiano (2014). Reseed: social event detection dataset. Proceedings of the 5th ACM Multimedia Systems Conference.

Georgios Petkos, Symeon Papadopoulos, Vasileios Mezaris, Raphael Troncy, Philipp Cimiano, Timo Reuter, and Yiannis Kompatsiaris (2014). Social Event Detection at MediaEval: a three-year retrospect of tasks and results. Proceedings of International Workshop on Social Events in Web Multimedia (co-located with ICMR 2014).

Symeon Papadopoulos, Adrian Popescu, and Ioannis Kompatsiaris (2014). Tourism Knowledge Discovery in Social Multimedia. Encyclopedia of Information Science and Technology, Third Edition.

Yiannis Kompatsiaris, Sotiris Diplaris, and Symeon Papadopoulos (2014). Collective Intelligence, Overview. Encyclopedia of Social Network Analysis and Mining.

Georgios Petkos, Symeon Papadopoulos, Emmanouil Schinas, and Yiannis Kompatsiaris (2014). Graph-based multimodal clustering for social event detection in large collections of images. MultiMedia Modeling: 20th Anniversary International Conference, MMM 2014, Dublin, Ireland, January 6-10, 2014, Proceedings, Part I 20.

I Kompatsiaris, S Diplaris, D Corney, N Heise, M Klusch, E Jaho, J Geurts, Y Liu, G Petkos, S Papadopoulos, N Sarris, A Goker, and J Spangenberg (2014). Real-time social media indexing and search. IBC2014 Conference, Amsterdam, Netherlands, 11-15 Sept. 2014.

Eleni Mantziou, Symeon Papadopoulos, and Yiannis Kompatsiaris (2013). Scalable training with approximate incremental laplacian eigenmaps and pca. Proceedings of the 21st ACM international conference on Multimedia.

Timo Reuter, Symeon Papadopoulos, Giorgos Petkos, Vasileios Mezaris, Yiannis Kompatsiaris, Philipp Cimiano, Christopher De Vries, and Shlomo Geva (2013). Social event detection at mediaeval 2013: Challenges, datasets, and evaluation. Proceedings of the MediaEval 2013 Multimedia Benchmark Workshop Barcelona, Spain, October 18-19, 2013.

Symeon Papadopoulos, Emmanouil Schinas, Theodoros Mironidis, Katerina Iliakopoulou, Eleftherios Spyromitros-Xioufis, Ioannis Tsampoulatidis, and Ioannis Kompatsiaris (2013). Social Multimedia Crawling and Search IEEE Computer Society Special Technical Community on Social Networking E-Letter.

David Corney, Carlos Martin, Ayse Göker, Eleftherios Spyromitros-Xioufis, Symeon Papadopoulos, Yiannis Kompatsiaris, Luca Aiello, and Bart Thomee (2013). SocialSensor: Finding Diverse Images at MediaEval 2013. MediaEval 2013 Workshop, Barcelona, Spain.

Emmanouil Schinas, Symeon Papadopoulos, Sotiris Diplaris, Yiannis Kompatsiaris, Yosi Mass, Jonathan Herzig, and Lazaros Boudakidis (2013). Eventsense: Capturing the pulse of large-scale events by mining social media streams. Proceedings of the 17th Panhellenic Conference on Informatics.

Konstantinos Konstantinidis, Symeon Papadopoulos, and Yiannis Kompatsiaris (2013). Community structure and evolution analysis of osn interactions around real-world social phenomena. Proceedings of the 17th Panhellenic Conference on Informatics.

Dimitris Kastrinakis, Symeon Papadopoulos, and Athena Vakali (2013). Compact and Distinctive Visual Vocabularies for Efficient Multimedia Data Indexing. Advances in Databases and Information Systems: 17th East European Conference, ADBIS 2013, Genoa, Italy, September 1-4, 2013. Proceedings 17.

Spiros Nikolopoulos, Symeon Papadopoulos, and Yiannis Kompatsiaris (2013). Reality mining in urban space. IISA 2013.

Eleni Mantziou, Symeon Papadopoulos, and Yiannis Kompatsiaris (2013). Large-scale semi-supervised learning by approximate laplacian eigenmaps, VLAD and pyramids. 2013 14th International Workshop on Image Analysis for Multimedia Interactive Services (WIAMIS).

Luca Maria Aiello, Georgios Petkos, Carlos Martin, David Corney, Symeon Papadopoulos, Ryan Skraba, Ayse Göker, Ioannis Kompatsiaris, and Alejandro Jaimes (2013). Sensing trending topics in Twitter. IEEE Transactions on multimedia.

Dorothea Tsatsou, Paul C Davis, Jianguo Li, Ioannis Kompatsiaris, Symeon Papadopoulos, and MOTOROLA MOBILITY, INC. (2013). Ontology Construction. Proceedings of the 4th ACM Multimedia Systems Conference.

Symeon Papadopoulos, Emmanouil Schinas, Vasileios Mezaris, Raphaël Troncy, and Ioannis Kompatsiaris (2013). The 2012 social event detection dataset. Proceedings of the 4th ACM Multimedia Systems Conference.

Symeon Papadopoulos, Christos Sagonas, Ioannis Kompatsiaris, and Athena Vakali (2013). Semi-supervised concept detection by learning the structure of similarity graphs. Advances in Multimedia Modeling: 19th International Conference, MMM 2013, Huangshan, China, January 7-9, 2013, Proceedings, Part I 19.

Symeon Papadopoulos, Emmanouil Schinas, Vasileios Mezaris, Raphael Troncy, and Ioannis Kompatsiaris (2012). Social Event Detection at MediaEval 2012: Challenges, Dataset and Evaluation. Working Notes Proceedings of the MediaEval 2012 Workshop.

Sotiris Diplaris, Giorgos Petkos, Symeon Papadopoulos, Yiannis Kompatsiaris, Nikos Sarris, Carlos Martin, Ayse Goker, David Corney, Joost Geurts, Yaning Liu, and Jean-Charles Point (2012). SocialSensor: Surfacing real-time trends and insights from multiple social networks. In Proceedings of the 2012 NEM Summit.

Emmanouil Schinas, Georgios Petkos, Symeon Papadopoulos, and Yiannis Kompatsiaris (2012). CERTH @ MediaEval 2012 Social Event Detection Task. Proceedings of MediaEval 2012 Workshop.

Symeon Papadopoulos, Yiannis Kompatsiaris, Athena Vakali, and Ploutarchos Spyridonos (2012). Community detection in Social Media: Performance and application considerations. Data mining and knowledge discovery.

Georgios Petkos, Symeon Papadopoulos, and Yiannis Kompatsiaris (2012). Social event detection using multimodal clustering and integrating supervisory signals. Proceedings of the 2nd ACM International Conference on Multimedia Retrieval.

Symeon Papadopoulos, Juxhin Bakalli, Yiannis Kompatsiaris, and Emmanouil Schinas (2012). Cluster-based photo browsing and tagging on the go. Proceedings of the 2nd ACM International Conference on Multimedia Retrieval.

E Spyromitros-Xioufis, Symeon Papadopoulos, Ioannis Kompatsiaris, Grigorios Tsoumakas, and I Vlahavas (2012). An empirical study on the combination of SURF features with VLAD vectors for image search. 2012 13th International Workshop on Image Analysis for Multimedia Interactive Services.

Sotiris Diplaris, Symeon Papadopoulos, Ioannis Kompatsiaris, Ayse Goker, Andrew Macfarlane, Jochen Spangenberg, Hakim Hacid, Linas Maknavicius, and Matthias Klusch (2012). Socialsensor: sensing user generated input for improved media discovery and experience. Proceedings of the 21st international conference on World Wide Web.

Sotiris Diplaris, Symeon Papadopoulos, Ioannis Kompatsiaris, Nicolaus Heise, Jochen Spangenberg, Nic Newman, and Hakim Hacid (2012). " Making sense of it all" an attempt to aid journalists in analysing and filtering user generated content. Proceedings of the 21st International Conference on World Wide Web.

Symeon Papadopoulos, Athena Vakali, and Ioannis Kompatsiaris (2012). The dynamics of content popularity in social media. Exploring Advances in Interdisciplinary Data Mining and Analytics: New Trends.

Eleni Mantziou, Georgios Petkos, Symeon Papadopoulos, Christos Sagonas, and Yiannis Kompatsiaris (2012). CERTH's Participation at the Photo Annotation Task of ImageCLEF 2012. CLEF (Online Working Notes/Labs/Workshop).

Milan Mirkovic, Dubravko Culibrk, Symeon Papadopoulos, Christos Zigkolis, Yiannis Kompatsiaris, Gavin McArdle, and Vladimir Crnojevic (2011). A comparative study of spatial, temporal and content-based patterns emerging in YouTube and Flickr. 2011 International Conference on Computational Aspects of Social Networks (CASoN).

Yiannis Kompatsiaris, Sotiris Diplaris, and Symeon Papadopoulos (2011). Extracting Emergent Semantics from Large-Scale User-Generated Content. ICT Innovations.

Symeon Papadopoulos, Christos Zigkolis, Yiannis Kompatsiaris, and Athena Vakali (2011). CERTH@ MediaEval 2011 Social Event Detection Task. CEUR-ws.org.

Symeon Papadopoulos, Raphael Troncy, Vasileios Mezaris, Benoit Huet, and Ioannis Kompatsiaris (2011). Social Event Detection at MediaEval 2011 Challenges, Dataset and Evaluation. MediaEval 2011 Workshop, Pisa, Italy.

Elisavet Chatzilari, Spiros Nikolopoulos, Symeon Papadopoulos, Christos Zigkolis, and Yiannis Kompatsiaris (2011). Semi-supervised object recognition using flickr images. 2011 9th International Workshop on Content-Based Multimedia Indexing (CBMI).

Christos Zigkolis, Symeon Papadopoulos, Yiannis Kompatsiaris, and Athena Vakali (2011). Detecting the long-tail of points of interest in tagged photo collections. 2011 9th International Workshop on Content-Based Multimedia Indexing (CBMI).

Spiros Nikolopoulos, Elisavet Chatzilari, Eirini Giannakidou, Symeon Papadopoulos, Ioannis Kompatsiaris, and Athena Vakali (2011). Leveraging massive user contributions for knowledge extraction. Next Generation Data Technologies for Collective Computational Intelligence.

Symeon Papadopoulos, Christos Zigkolis, Stefanos Kapiris, Yiannis Kompatsiaris, and Athena Vakali (2011). City exploration by use of spatio-temporal analysis and clustering of user contributed photos. Proceedings of the 1st ACM International Conference on Multimedia Retrieval.

Symeon Papadopoulos, Athena Vakali, and Yiannis Kompatsiaris (2011). Community detection in collaborative tagging systems. Community-Built Databases: Research and Development.

Maria Giatsoglou, Symeon Papadopoulos, and Athena Vakali (2011). Massive graph management for the web and web 2.0. New Directions in Web Data Management 1.

Sotiris Diplaris, Andreas Sonnenbichler, Tomasz Kaczanowski, Phivos Mylonas, Ansgar Scherp, Maciej Janik, Symeon Papadopoulos, Michael Ovelgoenne, and Yiannis Kompatsiaris (2011). Emerging, collective intelligence for personal, organisational and social use. Next generation data technologies for collective computational intelligence.

Dorothea Tsatsou, Symeon Papadopoulos, Ioannis Kompatsiaris, and Paul C Davis (2011). Distributed technologies for personalized advertisement delivery. Online Multimedia Advertising: Techniques and Technologies.

Symeon Papadopoulos, Christos Zigkolis, Yiannis Kompatsiaris, and Athena Vakali (2011). Cluster-based landmark and event detection for tagged photo collections IEEE Multimedia Magazine.

Symeon Papadopoulos, Ansgar Scherp, Neil Ireson, Ioannis Tsampoulatidis, and Yiannis Kompatsiaris (2010). Using event representation and semantic enrichment for managing and reviewing emergency incident logs. Proceedings of the 2nd ACM international workshop on Events in multimedia.

Symeon Papadopoulos, Christos Zigkolis, Stefanos Kapiris, Yiannis Kompatsiaris, and Athena Vakali (2010). ClustTour City exploration by use of hybrid photo clustering. Proceedings of the 18th ACM international conference on Multimedia.

Symeon Papadopoulos, Christos Zigkolis, Giorgos Tolias, Yannis Kalantidis, Phivos Mylonas, Yiannis Kompatsiaris, and Athena Vakali (2010). Image clustering through community detection on hybrid image similarity graphs. 2010 IEEE International Conference on Image Processing.

Symeon Papadopoulos, Yiannis Kompatsiaris, and Athena Vakali (2010). A graph-based clustering scheme for identifying related tags in folksonomies. Data Warehousing and Knowledge Discovery: 12th International Conference, DAWAK 2010, Bilbao, Spain, August/September 2010. Proceedings 12.

Stefanos Vrochidis, Symeon Papadopoulos, Anastasia Moumtzidou, Panagiotis Sidiropoulos, Emanuelle Pianta, and Ioannis Kompatsiaris (2010). Towards content-based patent image retrieval A framework perspective. World Patent Information.

Yiannis Kompatsiaris, Eirini Yannakidou, Symeon Papadopoulos, Spyros Nikolopoulos, and Elisavet Chatzilari (2010). Information Extraction from Social Sites SSMS.

Symeon Papadopoulos, Fotis Menemenis, Athena Vakali, and Ioannis Kompatsiaris (2010). Analysis of Content Popularity in Social Bookmarking Systems. Social Computing: Concepts, Methodologies, Tools, and Applications.

Symeon Papadopoulos, Yiannis Kompatsiaris, and Athena Vakali (2009). Leveraging collective intelligence through community detection in tag networks. Proceedings of CKCaR.

Simon Waddington, Ioannis Kompatsiaris, Fotis Menemenis, and Symeon Papadopoulos (2009). Selection of Associated Content for Content Items. US.

and Symeon Papadopoulos (2009). Key success factors in internet advertising. Blekinge Institute of Technology, School of Management. Independent thesis Advanced level.

Dorothea Tsatsou, Paul C Davis, Symeon Papadopoulos, Fotis Menemenis, Ben M Bratu, George Kalfas, Ioannis Kompatsiaris, and MOTOROLA, INC. (2009). Method and System for Recommendation of Content Items. US.

Symeon Papadopoulos, Fotis Menemenis, Yiannis Kompatsiaris, and Ben Bratu (2009). Lexical graphs for improved contextual ad recommendation. Advances in Information Retrieval: 31th European Conference on IR Research, ECIR 2009, Toulouse, France, April 6-9, 2009. Proceedings 31.

Symeon Papadopoulos, Andre Skusa, Athena Vakali, Yiannis Kompatsiaris, and Nadine Wagner (2009). Bridge bounding A local approach for efficient community discovery in complex networks. arXiv preprint arXiv:0902.0871.

A Scherp, F Schwagereit, N Ireson, V Lanfranchi, S Papadopoulos, A Kritikos, Y Kopatsiaris, and P Smrs (2009). Leveraging web 2.0 communities in professional organisations. W3C Workshop on the Future of Social Networking; Barcelona, Spain.

Fotis Menemenis, Symeon Papadopoulos, Ben Bratu, Simon Waddington, and Yiannis Kompatsiaris (2008). AQUAM: automatic query formulation architecture for mobile applications. Proceedings of the 7th international Conference on Mobile and Ubiquitous Multimedia.

Joan Codina, Emanuele Pianta, Stefanos Vrochidis, and Symeon Papadopoulos (2008). Integration of Semantic, Metadata and Image Search Engines with a Text Search Engine for Patent Retrieval SemSearch.

Leo Wanner, Ricardo Baeza-Yates, Sören Brügmann, Joan Codina, Barrou Diallo, Enric Escorsa, Mark Giereth, Yiannis Kompatsiaris, Symeon Papadopoulos, Emanuele Pianta, Gemma Piella, Ingo Puhlmann, Gautam Rao, Martin Rotard, Pia Schoester, Luciano Serafini, and Vasiliki Zervaki (2008). Towards content-oriented patent document processing. World Patent Information.

Symeon Papadopoulos, Athena Vakali, and Ioannis Kompatsiaris (2008). Digg it Up! Analyzing Popularity Evolution in a Web 2.0 Setting Proceedings of the Workshop on Mining Social Data (MSoDa 2008).

Mark Giereth, Steffen Koch, Yiannis Kompatsiaris, Symeon Papadopoulos, Emanuele Pianta, Luciano Serafini, and Leo Wanner (2007). A modular framework for ontology-based representation of patent information Legal Knowledge and Information Systems-JURIX 2007: The Twentieth Annual Conference.

Symeon Papadopoulos, Vasileios Mezaris, Ioannis Kompatsiaris, and Michael C Strintzis (2005). A region-based approach to conceptual image classification. IEE International Conference on Visual Information Engineering (VIE 2005).