Multimedia retrieval

Big Data Collections (e.g. Earth Observation data, social media streams, large video collections, etc.) are characterised by large volumes, velocity and variety, due to their high heterogeneous nature and timeliness. Multimedia retrieval requires efficient indexing of the available raw data and extracted metadata, such as concepts, visual features, textual features and mutually semantically linked multimodal objects. The multimodal character of Big Multimedia Data requires an effective combination of multiple modalities for similarity search and retrieval using compound queries. Our research focuses on the design and development of domain-specific and focused search engines with novel user interfaces, taking into account the AI-based extracted and indexed metadata per multimedia object.

PROJECTS

PUBLICATIONS

  1. K. Gkountakos, D. Galanopoulos, A. Leventakis, G. Tsionkis, K. Stavrothanasopoulos, K. Ioannidis, S. Vrochidis, V. Mezaris, I. Kompatsiaris, “ITI-CERTH participation in ActEV and AVS Tracks of TRECVID 2024”, Proc. TRECVID 2024 Workshop, Gaithersburg, MD, USA, Nov. 2024.
  2. M. Pegia, B. Þ. Jónsson, A. Moumtzidou, S. Dimplaris, I. Gialampoukidis, S. Vrochidis, I. Kompatsiaris, "Descriptor Impact on Multimodal 3D Retrieval", in Content-based Multimedia Indexing (CBMI), Reykjavik, Iceland, 18-20 September 2024 OPEN ACCESS
  3. M. Pegia, D. Georgalis, N. Pantelidis, B. Þ. Jónsson, A. Moumtzidou, S. Diplaris, I. Gialampoukidis, S. Vrochidis, I. Kompatsiaris. "3DMSE: An Interactive 3D Media Search Engine", in Proceedings of the 2024 International Conference on Multimedia Retrieval (ICMR 2024), Phuket, Thailand, June 10-14, 2024. OPEN ACCESS
  4. M. Pegia, S. Diplaris, S. Vrochidis, H. Schuldt, F. Spiess, R. Arnold, W. Bailer. "Multimedia Retrieval in and for XR" In in Proceedings of the 2024 International Conference on Multimedia Retrieval (ICMR 2024), Phuket, Thailand, June 10-14, 2024.
  5. M. Pegia. "Multimodality in Media Retrieval", in Proceedings of the 2024 International Conference on Multimedia Retrieval (ICMR 2024), Phuket, Thailand, June 10-14, 2024. OPEN ACCESS
  6. M. Pegia, B. Þ. Jónsson, A. Moumtzidou, I. Gialampoukidis, S. Vrochidis, and I. Kompatsiaris, ”MuseHash: Super- vised Bayesian Hashing for Multimodal Image Representation” in ACM ICMR ’23: ACM International Conference on Multimedia Retrieval, June 10– 15, 2023, Thessaloniki, Greece. Proceedings of the 2023 ACM International Conference on Multimedia Retrieval, pp. 434–442, https://doi.org/10.1145/3591106.3592228. OPEN ACCESS
  7. N. Pantelidis, S. Andreadis, M. Pegia, A. Moumtzidou, D. Galanopoulos, K. Apostolidis, D. Touska, K. Gkountakos, I. Gialampoukidis, S. Vrochidis, V. Mezaris, and I. Kompatsiaris, “VERGE in VBS 2023” in MultiMedia Modeling: 29th International Conference. MMM 2023, Bergen, Norway, January 9–12, 2023, Proceedings, Part I. Springer-Verlag, Berlin, Heidelberg, 2023, pp. 658–664. https://doi.org/10.1007/978-3-031-27077-2_55. OPEN ACCESS
  8. K. Gkountakos, D. Galanopoulos, D. Touska, K. Ioannidis, S. Vrochidis, V. Mezaris, I. Kompatsiaris, “ITI-CERTH participation in ActEV and AVS Tracks of TRECVID 2022”, Proc. TRECVID 2022 Workshop, Gaithersburg, MD, USA, 6 Dec. 2022. OPEN ACCESS
  9.  A-M. Koufakis, T. Tsikrika, S. Vrochidis, I. Kompatsiaris, “M4D-MKLab/ITI-CERTH Participation in TREC Deep Learning Track 2022” in Proc. Text REtrieval Conference (TREC) 2022 Workshop, Gaithersburg, MD, USA, 14-18 Nov. 2022. OPEN ACCESS
  10. M. Pegia, A. Moumtzidou, I.Gialampoukidis, B. T. Johnsson, S. Vrochidis, and I. Kompatsiaris "BiasHash: A Bayesian Hashing Framework for Image Retrieval", In the proceedings of the 2022 IEEE 14th Image, Video, and Multidimensional Signal Processing Workshop (IVMSP 2022), 26-29 June 2022, Nafplio, Greece. DOI: 10.1109/IVMSP54334.2022.9816233
  11. J. Lokoc, L. Rossetto, W. Bailer, K. Schoeffmann, S. Vrochidis, C. Gurrin, S. Heller, L. Vadicamo, K. Barthel, L. Peška, J. Wu, B. Jónsson, "A Task Category Space for User-Centric Comparative Multimedia Search Evaluations", In Proceedings of the 28th International Conference on Multimedia Modelling (MMM2022), Phu Quoc, Vietnam, 6-10 June, 2022. OPEN ACCESS
  12. S. Andreadis, A. Moumtzidou, D. Galanopoulos, N. Pantelidis, K. Apostolidis, D. Touska, K. Gkountakos, M. Pegia, I. Gialampoukidis, S. Vrochidis, V. Mezaris and I. Kompatsiaris, "VERGE in VBS 2022", In Proceedings of the 28th International Conference on Multimedia Modelling (MMM2022),  5-8 April 2022, Phu Quoc, Vietnam. OPEN ACCESS
  13. K. Gkountakos, D. Galanopoulos, D. Touska, K. Ioannidis, S. Vrochidis, V. Mezaris, I. Kompatsiaris, "ITI-CERTH participation in ActEV and AVS Tracks of TRECVID 2021" in Proc. TRECVID 2021 Workshop, Gaithersburg, MD, USA (Virtual), 2021. OPEN ACCESS
  14. A-Μ Koufakis, T. Tsikrika, S. Vrochidis, & I. Kompatsiaris,  "M4D-MKLab/ITI-CERTH Participation in TREC Deep Learning Track 2021". Text REtrieval Conference (TREC). OPEN ACCESS
  15. S. Heller, V. Gsteiger, W. Bailer, C. Gurrin, B. Þ. Jónsson, Jakub Loko, Andreas Leibetseder, F. Mejzlík, L. Peška, L. Rossetto, K. Schall, K. Schoeffmann, H. Schuldt, F. Spiess, L.-D. Tran, L. Vadicamo, P. Veselý, S. Vrochidis, and J. Wu, "Interactive Video Retrieval Evaluation at a Distance - Comparing Sixteen Interactive Video Search Systems in a Remote Setting at the 10th Video Browser Showdown", International Journal of Multimedia Information Retrieval, 11, pages 1–18, 2022.
  16. J. Lokoč, P. Veselý, F. Mejzlík, G. Kovalčík, T. Souček, K. Schoeffmann, W. Bailer, C. Gurrin, L. Sauter, J. Song, S. Vrochidis, J. Wu, B. Þór Jónsson. “Is the Reign of Interactive Search Eternal?Findings from the Video Browser Showdown 2020”. Transactions on Multimedia Computing Communications and Applications, Volume 17, Issue 3, August 2021, Article No.: 91pp 1–26. DOI:https://doi.org/10.1145/3445031.
  17. I. Gialampoukidis , A. Moumtzidou, M. Bakratsas , S. Vrochidis, I. Kompatsiaris, "A multimodal tensor-based late fusion approach for satellite image search in Sentinel 2 images", In Proceedings of the 27th International Conference on Multimedia Modeling, (MMM 2021), Prague, Czech Republic, 22-24 June, 2021. DOI:10.1007/978-3-030-67832-6. OPEN ACCESS
  18. S. Andreadis, A. Moumtzidou, K. Gkountakos, N. Pantelidis, K. Apostolidis, D. Galanopoulos, I. Gialampoukidis, S. Vrochidis, V. Mezaris, I. Kompatsiaris, "VERGE in VBS 2021", Proc. 27th Int. Conf. on Multimedia Modeling (MMM2021), Prague, CZ, Springer LNCS vol. 12573, pp. 398–404, 22-24 June 2021. DOI:10.1007/978-3-030-67835-7_35 OPEN ACCESS
  19. S. Andreadis, I. Gialampoukidis, V. Sitokonstantinou, B. Coloru, H. Vervaeren, E. López, V. Kalogirou, P. Syropoulou, E. B. Kosmatopoulos, S. Vrochidis, E. Li Santi, G. Vingione, I. Kompatsiaris, "CALLISTO: Copernicus Artificial Intelligence Services and data fusion with other distributed data sources and processing at the edge to support DIAS and HPC infrastructures",In Proceedings of the Big Data from Space 2021,Virtual, 18-20 May 2021. OPEN ACCESS
  20. W. Yao, A. Moumtzidou , C. O. Dumitru, S. Andreadis, I. Gialampoukidis, S. Vrochidis, M. Datcu, I. Kompatsiaris, "Early and Late Fusion of Multiple Modalities in Sentinel Imagery and Social Media Retrieval" , in 11th IAPR International Workshop on Pattern Recognition in Remote Sensing (PRRS 2020/2021), in conjunction with the International Conference on Pattern Recognition (ICPR 2020), 10 January 2021. OPEN ACCESS
  21. K. Gkountakos, D. Galanopoulos, M. Mpakratsas, D. Touska, A. Moumtzidou, K. Ioannidis, I. Gialampoukidis, S. Vrochidis, V. Mezaris, I. Kompatsiaris, "ITI-CERTH participation in TRECVID 2020", Proc. TRECVID 2020 Workshop, Gaithersburg, MD, USA, Dec. 2020. OPEN ACCESS
  22. A. Arampatzis, L. Cappellato, L., E. Kanoulas, T. Tsikrika, S. Vrochidis, H. Joho, C. Lioma, A. N ev eol, L. Cappellato, and N. Ferro. Report on CLEF 2020. ACM SIGIR Forum, Vol. 54 No. 2 December 2020. OPEN ACCESS
  23. A. Arampatzis, E. Kanoulas, T. Tsikrika, S. Vrochidis, H. Joho, C. Lioma, K. Eickhoff, A. N ev eol, L. Cappellato, and N. Ferro, editors. Experimental IR Meets Multilinguality, Multimodality, and Interaction. Proceedings of the Eleventh International Conference of the CLEF Association (CLEF 2020). Lecture Notes in Computer Science (LNCS) 12260, Springer, Heidelberg, Germany, 22-25 September 2020.
  24. A. Karakostas, E. Nikolaidis, S. Vrochidis, S. Demetriadis, Y. Kompatsiaris, "colMOOC – an Innovative Conversational Agent Platform to Support MOOCs", In 2020 IEEE 20th International Conference on Advanced Learning Technologies (ICALT), July 2020. OPEN ACCESS
  25. S. Andreadis, A. Moumtzidou, K. Apostolidis, K. Gkountakos, D. Galanopoulos, E. Michail, I. Gialampoukidis, S. Vrochidis, V. Mezaris, I. Kompatsiaris, "VERGE in VBS 2020", Proc. 26th Int. Conf. on Multimedia Modeling (MMM2020), 5-8 January 2020, Daejeon Convention Center (DCC), Korea OPEN ACCESS
  26. P. Panagiotou, G. Kalpakis, T. Tsikrika, S. Vrochidis, I. Kompatsiaris. "Query reformulation based on word embeddings: A comparative study". Technology Advances and Support for Security Practitioners of the Security Informatics and Law Enforcement book series. OPEN ACCESS
  27. E. Kamateri, T. Tsikrika, S. Symeonidis, S. Vrochidis, W. Minker and Y. Kompatsiaris, "A Test Collection for Passage Retrieval Evaluation of Spanish Health-Related Resources", 41st European Conference on Information Retrieval (ECIR 2019), 14-18 April 2019, Cologne, Germany. https://doi.org/10.1007/978-3-030-15719-7_19
  28. S. Vrochidis, B. Huet, E. Chang, I. Kompatsiaris (2019). Big Data Analytics for Large-Scale Multimedia Retrieval. 348 Pages, Wiley.
  29. I. Gialampoukidis, E. Chatzilari, S. Nikolopoulos, S. Vrochidis, I. Kompatsiaris. “Multimodal Fusion of Big Multimedia Data, in Book: Big Data Analytics for Large-Scale Multimedia Search”. 15 March 2019. OPEN ACCESS
  30. J. Lokoc, G. Kovalcik, B. Munzer, K. Schoffmann, W. Bailer, R. Gasser, S. Vrochidis, P. Anh Nguyen, S. Rujikietgumjorn, K. Uwe Barthel. “Interactive Search or Sequential Browsing? A Detailed Analysis of the Video Browser Showdown 2018”. ACM Transactions on Multimedia Computing, Communications, and Applications 1 February 2019. OPEN ACCESS
  31. S. Andreadis, A. Moumtzidou, D. Galanopoulos, F. Markatopoulou, K. Apostolidis, T. Mavropoulos, I. Gialampoukidis, S. Vrochidis, V. Mezaris, I. Kompatsiaris, I. Patras, "VERGE in VBS 2019", Proc. 25th Int. Conf. on Multimedia Modeling (MMM2019), Thessaloniki, Greece, Springer LNCS vol. 11296, pp. 602-608, Jan. 2019. OPEN ACCESS
  32. I. Kompatsiaris, B. Huet, V. Mezaris, C. Gurrin, W.-H. Cheng, S. Vrochidis (Eds.). “MultiMedia Modeling”. 25th Int. Conf., MMM 2019, Thessaloniki, Greece, Proceedings, Part I, Springer LNCS vol. 11295, 8 January 2019. OPEN ACCESS
  33. I. Kompatsiaris, B. Huet, V. Mezaris, C. Gurrin, W.-H. Cheng, S. Vrochidis (Eds.). “MultiMedia Modeling”. 25th Int. Conf., MMM 2019, Thessaloniki, Greece, Proceedings, Part II, Springer LNCS vol. 11296, 8 January 2019.
  34. K. Avgerinakis, A. Moumtzidou, D. Galanopoulos, G. Orfanidis, S. Andreadis, F. Markatopoulou, E. Batziou, K. Ioannidis, S. Vrochidis, V. Mezaris, I. Kompatsiaris, "ITI-CERTH participation in TRECVID 2018", in Proc. TRECVID 2018 Workshop, Gaithersburg, MD, USA, Nov. 2018. OPEN ACCESS
  35. A. Moumtzidou, P. Giannakeris, S. Andreadis, A. Mavropoulos, G. Meditskos, I. Gialampoukidis, K. Avgerinakis, S. Vrochidis and I. Kompatsiaris, "A multimodal approach in estimating road passability through a flooded area using social media and satellite images", multimedia satellite task MediaEval 2018. In Proceedings of the Working Notes Proceeding MediaEval Workshop, Sophia Antipolis, France, 29-31 October, 2018. OPEN ACCESS
  36. S. Vrochidis, A. Moumtzidou, I. Gialampoukidis, D. Liparas, G. Casamayor, L. Wanner, N. Heise, T. Wagner, A. Bilous, E. Jamin, B. Simeonov, V. Alexiev, R. Busch, I. Arapakis, I. Kompatsiaris. “A multimodal analytics platform for journalists analysing large-scale, heterogeneous multilingual and multimedia content”. Frontiers in Robotics and AI, 5, 123, 29 October 2018. OPEN ACCESS
  37. K. Avgerinakis, F. Bellotti, M. Vergauwen, L. Wanner and S. Vrochidis. "1st International Workshop on Multimedia Analysis for Architecture, Design and Virtual Reality Games (MADVR 2018)". 2018 IEEE International Symposium on Mixed and Augmented Reality Adjunct (ISMAR-Adjunct), Munich, Germany, 16-20 October 2018, pp. 280-280. OPEN ACCESS
  38. E. Andre, T. W. Bickmore, S. Vrochidis, L. Wanner (Eds). (2018). Proceedings of the AAMAS Workshop on Intelligent Conversation Agents in Home and Geriatric Care Applications co-located with the Federated AI Meeting (FAIM 2018). ICAHGCA@AAMAS 2018, Stockholm, Sweden, July 15, 2018. CEUR, Vol 2338 OPEN ACCESS
  39. E. Andre, T. W. Bickmore, S. Vrochidis, L. Wanner (Eds). (2018). Proceedings of the AAMAS Workshop on Intelligent Conversation Agents in Home and Geriatric Care Applications co-located with the Federated AI Meeting (FAIM 2018). ICAHGCA@AAMAS 2018, Stockholm, Sweden, 15 July, 2018. CEUR, Vol 2338. OPEN ACCESS
  40. A. Joly, S. Vrochidis, K. Karatzas, A. Karppinen, P. Bonnet (2018). Multimedia Tools and Applications for Environmental & Biodiversity Informatics.  221 pages, Springer.
  41. A. Moumtzidou, S. Andreadis, F. Markatopoulou, D. Galanopoulos, I. Gialampoukidis, S. Vrochidis, V. Mezaris, I. Kompatsiaris, I. Patras, "VERGE IN VBS 2018", in International Conference on Multimedia Modeling 2018. OPEN ACCESS
  42. E. Batziou, I. Gialampoukidis, S. Vrochidis, I. Antoniou, I. Kompatsiaris, "Unsupervised Keyword Extraction Using the GoW Model and Centrality Scores", in International Conference on Internet Science, pp. 344-351. Springer, Cham, 2017. OPEN ACCESS
  43. T. Tsikrika, S. Symeonidis, I. Gialampoukidis, A. Satsiou, S. Vrochidis, I. Kompatsiaris, "A Hybrid Recommendation System Based on Density-Based Clustering", ”. In INSCI 2017 International Workshops, IFIN, DATA ECONOMY, DSI, and CONVERSATIONS. Diplaris S., Satsiou A., Folstad A., Vafopoulos M., Vilarinho T. (eds), Internet Science., Revised Selected Papers. Lecture Notes in Computer Science, vol 10750. Springer, Cham. OPEN ACCESS
  44. S. Andreadis, I. Gialampoukidis, S. Vrochidis, I. Kompatsiaris, "A Topic Detection and Visualisation System on Social Media Posts", in International Conference on Internet Science, pp. 421-427. Springer, Cham, 2017.
  45. F. Markatopoulou, A. Moumtzidou, D. Galanopoulos, K. Avgerinakis, S. Andreadis, I. Gialampoukidis, S. Tachos, S. Vrochidis, V. Mezaris, I. Kompatsiaris, I. Patras, "ITI-CERTH participation in TRECVID 2017", in Proc. TRECVID 2017 Workshop, Gaithersburg, MD, USA, Nov. 2017. OPEN ACCESS
  46. M. Zampoglou, S. Vrochidis, A. Rocha, V. Katos (Eds.). (2017). MFSec '17: Proceedings of the 2nd International Workshop on Multimedia Forensics and Security. Bucharest, Romania, 2017. Association for Computing Machinery, 30 June 2017. OPEN ACCESS
  47. B. Akhgar, P. Bertrand, C. Chalanouli, T. Day, I. Fragkiadakis, H. Gibson, D. Kavallieros, E. Kermitsis, I. Kompatsiaris, E. Kyriakou, G. Leventakis, E. Lissaris, S. Mille, D. Myttas, T. Tsikrika, S. Vrochidis, U. Williamson. "TENSOR: Retrieval and Analysis of Heterogeneous Online Content for Terrorist Activity Recognition". Proceedings of the Estonian Academy of Se-curity Sciences: Secure Societies, 15 June 2017. OPEN ACCESS
  48. I. Gialampoukidis, A. Moumtzidou, D. Liparas, T. Tsikrika, S. Vrochidis, I. Kompatsiaris. "Multimedia retrieval based on non-linear graph-based fusion and partial least squares regression". Multimedia Tools and Applications, 15 May 2017. OPEN ACCESS
  49. T. Tsikrika, B. Akhgar, V. Katos, S. Vrochidis, P. Burnap, M. L. Williams, "1st International Workshop on Search and Mining Terrorist Online Content & Advances in Data Science for Cyber Security and Risk on the Web". In Proceedings of the Tenth ACM International Conference on Web Search and Data Mining (WSDM 2017), pp. 823-824, Cambridge, UK, February 2017. OPEN ACCESS
  50. C. Cobarzan, K. Schoeffmann, W. Bailer, W. Hurst, A. Blazek, J. Lokoc, S. Vrochidis, K. Uwe Barthel, and L. Rossetto.“Interactive video search tools: a detailed analysis of the video browser showdown 2015”. Multimedia Tools Appl. 76, 5539-5571, 4 February 2017. OPEN ACCESS
  51. A. Moumtzidou, T. Mironidis, F. Markatopoulou, S. Andreadis, I. Gialampoukidis, D. Galanopoulos, A. Ioannidou, S. Vrochidis, V. Mezaris, I. Kompatsiaris, I. Patras. "VERGE IN VBS 2017", in Proc. Video Browser Showdown (VBS'17) at the 23rd Int. Conf. on MultiMedia Modeling (MMM'17), Reykjavik, Iceland, 4 January 2017. OPEN ACCESS
  52. F. Markatopoulou, A. Moumtzidou, D. Galanopoulos, T. Mironidis, V. Kaltsa, A. Ioannidou, S. Symeonidis, K. Avgerinakis, S. Andreadis, I. Gialampoukidis, S. Vrochidis, A. Briassouli, V. Mezaris, I. Kompatsiaris, I. Patras, "ITI-CERTH participation in TRECVID 2016", in Proc. TRECVID 2016 Workshop, Gaithersburg, MD, USA, Nov. 2016. OPEN ACCESS
  53. I. Gialampoukidis, S. Vrochidis, I. Kompatsiaris,"Incremental estimation of visual vocabulary size for image retrieval", in INNS Conference on Big Data, pp. 29-38. Springer International Publishing, 2016.
  54. S. Vrochidis, L. Wanner, E. Andre, S. E. Schwartz (Eds.). (2016). MARMI ’16: Proceedings of the 1st International Workshop on Multimedia Analysis and Retrieval for Multimodal Interaction. New York, USA, 2016. Association for Computing Machinery, 30 June 2016.
  55. A. Moumtzidou, I. Gialampoukidis, T. Mironidis, D. Liparas, S. Vrochidis, I. Kompatsiaris, "A Multimedia Interactive Search Engine based on Graph-based and Non-linear Multimodal Fusion", in 14th International Workshop on Content-Based Multimedia Indexing (CBMI), 2016, IEEE, 2016. DOI: 10.1109/CBMI.2016.7500276
  56. I. Gialampoukidis, A. Moumtzidou, T. Tsikrika, S. Vrochidis and I. Kompatsiaris, "Retrieval of Multimedia objects by Fusing Multiple Modalities", in Proceedings of the 2016 ACM on International Conference on Multimedia Retrieval, pp. 359-362, ACM. https://dl.acm.org/doi/10.1145/2911996.2912068
  57. L. Wanner, J. Blat, S. Dasiopoulou, M. Dominguez, G. Llorach, S. Mille, F. Sukno, E. Kamateri, S. Vrochidis, I. Kompatsiaris, E. Andre, F. Lingenfelser, G. Mehlmann, A. Stam, L. Stellingwerff, B. Vieru, L. Lamel, W. Minker, L. Pragst, Stefan Ultes,"Towards a Multimedia Knowledge-Based Agent with Social Competence and Human Interaction Capabilities", 1st International Workshop on Multimedia Analysis and Retrieval for Multimodal Interaction (MARMI 2016), New York, USA, June 6, 2016. https://doi.org/10.1145/2927006.2927011
  58. I. Gialampoukidis, A. Moumtzidou, D. Liparas, S. Vrochidis, I. Kompatsiaris, "A hybrid graph-based and non-linear late fusion approach for multimedia retrieval", in 14th International Workshop on Content-Based Multimedia Indexing (CBMI), 2016, pp. 1-6, IEEE, 2016. OPEN ACCESS
  59. S. Vrochidis, K. Karatzas, A. Karppinen, A. Joly (Eds). (2016). Guest Editorial: Environmental Multimedia Retrieval. Multimedia Tools Appl. 75(3): 1557-1562, 28 January 2016. OPEN ACCESS
  60. S. Vrochidis, I. Patras and I. Kompatsiaris. "Gaze Movement-driven Random Forests for Query Clustering in Automatic Video Annotation". Multimedia Tools and Applications, 22 January 2016. OPEN ACCESS
  61. A. Moumtzidou, T. Mironidis, E. Apostolidis, F. Markatopoulou, A. Ioannidou, I. Gialampoukidis, K. Avgerinakis, S. Vrochidis, V. Mezaris, I. Kompatsiaris, I. Patras,"VERGE: A Multimodal Interactive Search Engine for Video Browsing and Retrieval", in Proc. Video Browser Showdown (VBS'16) at the 22nd Int. Conf. on MultiMedia Modeling (MMM'16), Miami, USA, 4 January 2016. https://doi.org/10.1007/978-3-319-27674-8_39
  62. I. Gialampoukidis, S. Vrochidis, I. Kompatsiaris, "Fast Visual Vocabulary Construction for Image Retrieval using Skewed-Split k-d trees", In International Conference on Multimedia Modeling, pp. 466-477. Springer In-ternational Publishing, 2016. https://doi.org/10.1007/978-3-319-27671-7_39
  63. F. Markatopoulou, A. Ioannidou, C. Tzelepis, T. Mironidis, D. Galanopoulos, S. Arestis-Chartampilas, N. Pittaras, K. Avgerinakis, N. Gkalelis, A. Moumtzidou, S. Vrochidis, V. Mezaris, I. Kompatsiaris, I. Patras, "ITI-CERTH participation to TRECVID 2015", in Proc. TRECVID 2015 Workshop, Gaithersburg, MD, USA, Nov. 2015.
  64. T. Tsikrika, G. Kalpakis, S. Vrochidis, I. Kompatsiaris, I. Paraskakis, I. Kavasidis, J. Middleton, and U. Williamson, "A Framework for the Discovery, Analysis, and Retrieval of Multimedia Homemade Explosives Information on the Web", in Proceedings of the International Workshop on Multimedia Forensics and Security (MFSec 2015), held in conjunction with the 10th International Conference on Availability, Reliability and Security, Toulouse, France, 2015. https://doi.org/10.1109/ARES.2015.86
  65. G. Kalpakis, T. Tsikrika, F. Markatopoulou, N. Pittaras, S. Vrochidis, V. Mezaris, I. Patras, and I. Kompatsiaris, "Concept Detection on Multimedia Web Resources about Home Made Explosives", in Proceedings of the International Workshop on Multimedia Forensics and Security (MFSec 2015), held in conjunction with the 10th International Conference on Availability, Reliability and Security, Toulouse, France, 2015. DOI: 10.1109/ARES.2015.85
  66. S. Vrochidis, K. Karatzas, A. Karppinen, A. Joly, A. B. Albu (Eds.). (2015). EMR ’15: Proceedings of the 2nd International Workshop on Environmental Multimedia Retrieval. Shanghai, China,Association for Computing Machinery, 30 June 2015.
  67. S. Vrochidis, I. Kompatsiaris, G. Casamayor, I. Arapakis, R. Busch, V. Alexiev, E. Jamin, M. Jugov, N. Heise, T. Forrellat, D. Liparas, L. Wanner, I. Miliaraki, V. Aleksic, K. Simov, A. M. Soro, M. Eckhoff, T. Wagner, M. Puigbo,"MULTISENSOR: Development of Multimedia Content Integration Technologies for Journalism, Media Monitoring and International Exporting Decision Support", in 2015 IEEE International Conference on Multimedia and Expo (ICME 2015), Turin, Italy, June 29 - July 3, 2015.
  68. A. Moumtzidou, S. Vrochidis, I. Kompatsiaris. "Discovery, Analysis and Retrieval of Multimodal Environmental Information". Third Edition. IGI Global, 1 June 2015. 4528-4542. OPEN ACCESS
  69. T. Tsikrika, A. Moumtzidou, S. Vrochidis and I. Kompatsiaris. "Focussed Crawling of Environmental Web Resources Based on the Combination of Multimedia Evidence, Multimedia Tools and Applications". May 2015, pp 1-25, 31 May 2015. OPEN ACCESS
  70. V. Epitropou, T. Bassoukos, K. Karatzas, A. Karppinen, L. Wanner, S. Vrochidis, I. Kompatsiaris, J. Kukkonen. "Environmental data extraction from heatmaps using the AirMerge system". Multimedia Tools and Applications, May 2015. pp. 1-25, 7 May 2015. OPEN ACCESS
  71. A. Moumtzidou, K. Avgerinakis, E. Apostolidis, F. Markatopoulou, K. Apostolidis, T. Mironidis, S. Vrochidis, V. Mezaris, Y. Kompatsiaris, I. Patras,"VERGE: A Multimodal Interactive Video Search Engine", in Proc. 21st Int. Conf. on MultiMedia Modeling (MMM15), Sydney, Australia, Jan. 2015. https://doi.org/10.1007/978-3-319-14442-9_23
  72. L. Wanner, H. Bosch, N. Bouayad-Agha, G. Casamayor, T. Ertl, D. Hilbring, L. Johansson, K. Karatzas, A. Karppinen, I. Kompatsiaris, T. Koskentalo, S. Mille, J. Mossgraber, A. Moumtzidou, M. Myllynen, E. Pianta, M. Rospocher, L. Serafini, V. Tarvainen, S. Tonelli, S. Vrochidis. "Getting the environmental information across: From the web to the user". Expert Systems, 15 December 2014. OPEN ACCESS
  73. D. Liparas, Y. Hacohen-Kerner, A. Moumtzidou, S. Vrochidis and I. Kompatsiaris,"News articles classification using Random Forests and weighted multimodal features", in Proceedings of the 3rd Open Interdisciplinary MUMIA Conference and 7th Information Retrieval Facility Conference (IRFC2014), 10 - 12 November 2014, Copenhagen, Denmark, LNCS 8849, pp. 63-75, Berlin: Springer-Verlag, 2014.
  74. N. Gkalelis, F. Markatopoulou, A. Moumtzidou, D. Galanopoulos, K. Avgerinakis, N. Pittaras, S. Vrochidis, V. Mezaris, I. Kompatsiaris, I. Patras,"ITI-CERTH participation to TRECVID 2014", in Proc. TRECVID 2014 Work-shop, Orlando, FL, USA, November 2014.
  75. S. Vrochidis, K. Karatzas, A. Karppinen, A. Joly, (Eds.). (2014). EMR ’14: Proceedings of the 1nd International Workshop on Environmental Multimedia Retrieval. Glasgow, UK, 1 April 2014, CEUR, Vol 1222.
  76. S. Vrochidis, A. Moumtzidou, I. Kompatsiaris. "Enhancing Patent Search with Content-based Image Retrieval". Professional Search in the Modern World, Lecture Notes in Computer Science Volume 8830, 31 January 2014, pp 250-273. OPEN ACCESS
  77. A. Moumtzidou, K. Avgerinakis, E. Apostolidis, V. Aleksic, F. Markatopoulou, C. Papagiannopoulou, S. Vrochidis, V. Mezaris, R. Busch, I. Kompatsiaris,"VERGE: An Interactive Search Engine for Browsing Video Collections", in Proc. Video Browser Showdown (VBS'14) at the 20th Int. Conf. on MultiMedia Modeling (MMM'14), Dublin, Ireland, Springer LNCS vol. 8326, pp. 411-414, January 2014.
  78. F. Markatopoulou, A. Moumtzidou, C. Tzelepis, K. Avgerinakis, N. Gkalelis, S. Vrochidis, V. Mezaris, and I. Kompatsiaris, "ITI-CERTH participation to TRECVID 2013", in TRECVID 2013 Workshop, Gaithersburg, MD, USA, 2013.
  79. A. Moumtzidou, S. Vrochidis, E. Chatzilari and I. Kompatsiaris, "Discovery of Environmental Resources based on Heatmap Recognition", in Proceedings of the IEEE International Conference on Image Processing (ICIP 2013), Melbourne, Australia, September 15-18, 2013.
  80. A. Moumtzidou, S. Vrochidis, I. Kompatsiaris, "Discovery of Weather Forecast Web Resources based on Ontology and Content-driven Hierarchical Classification", in Proceedings of 14th International Conference on Engineering Applications of Neural Networks (EANN 2013), Halkidiki, Greece, 13-16 September, 2013. Communi-cations in Computer and Information Science, Springer Berlin Heidelberg, Vol. 383, pp. 223-232.
  81. A. Moumtzidou, N. Gkalelis, P. Sidiropoulos, M. Dimopoulos, S. Nikolopoulos, S. Vrochidis, V. Mezaris, I. Kompatsiaris,"ITI-CERTH participation to TRECVID 2012", in Proceedings of TRECVID 2012 Workshop, November 2012, Gaithersburg, MD, USA.
  82. S. Vrochidis, A. Moumtzidou, and I. Kompatsiaris. "Concept-based Patent Image Retrieval". World Patent Information Journal, Volume 34, Issue 4, pp. 292-303, 18 August 2012. OPEN ACCESS
  83. P. Sidiropoulos, S. Vrochidis, I. Kompatsiaris. "Content-Based Binary Image Retrieval using the Adaptive Hierarchical Density Histogram". Pattern Recognition Journal, Elsevier, Volume 44, Issue 4, pp 739-750, 18 August 2012. OPEN ACCESS
  84. S. Vrochidis, A. Moumtzidou, G. Ypma and I. Kompatsiaris, "PatMedia: Augmenting Patent Search with Content-based Image Retrieval", in Proceedings of the 5th IRF Conference, Austria, Vienna, July 2-3, 2012. https://doi.org/10.1007/978-3-642-31274-8_9
  85. S. Vrochidis, I. Patras and I. Kompatsiaris, "Exploiting gaze movements for automatic video annotation", in Proceedings of the 13th International Workshop on Image Analysis for Multimedia Interactive Services (WIAMIS 2012), Dublin, Ireland, May 23-25, 2012. DOI: 10.1109/WIAMIS.2012.6226766
  86. A. Moumtzidou, P. Sidiropoulos, S. Vrochidis, N. Gkalelis, S. Nikolopoulos, V. Mezaris, I. Kompatsiaris, I. Patras, "ITI-CERTH participation to TRECVID 2011", in Proceedings of TRECVID 2011 Workshop, December 2011, Gaithersburg, MD, USA.
  87. S. Vrochidis, I. Patras, I. Kompatsiaris, "An eye-tracking-based approach to facilitate interactive video search", in ICMR '11 Proceedings of the 1st ACM International Conference on Multimedia Retrieval, 2011. https://doi.org/10.1145/1991996.1992039
  88. S. Vrochidis, I. Kompatsiaris and I. Patras. "Utilizing Implicit User Feedback to Improve Interactive Video Retrieval". In Ad-vances in Multimedia, Hindawi, vol. 2011, Article ID 310762, 18 pages, 24 March 2011. OPEN ACCESS
  89. A. Moumtzidou, A. Dimou, N. Gkalelis, S. Vrochidis, V. Mezaris, I. Kompatsiaris,"ITI-CERTH participation to TRECVID 2010", in Proceedings of TRECVID 2010 Workshop, November 2010, Gaithersburg, MD, USA.
  90. L. Wanner, H. Bosch, N. Bouayad-Agha, U. Brugel, G. Casamayor, T. Ertl, A. Karppinen, I. Kompatsiaris, T. Koskentalo, S. Mille, J. Mossgraber, A. Moumtzidou, M. Myllynen, E. Pianta, M. Rospocher, H. Saggion, L. Serafini, V. Tarvainen, S. Tonelli, T. Uslander, S. Vrochidis, "Service-Based Infrastructure for User-Oriented Environmental Information Delivery", ENVIP 2010 Workshop, Bonn/Cologne, October 6-8, 2010.
  91. S. Vrochidis, I. Kompatsiaris and I. Patras, "Optimizing Visual Search with Implicit User Feedback in Interactive Video Retrieval", in Proceedings of the ACM International Conference on Image and Video Retrieval (CIVR 2010), pp 274-281, Xi'an, China, 5-7 July 2010. https://doi.org/10.1145/1816041.1816082
  92. P. Sidiropoulos, S. Vrochidis and I. Kompatsiaris,"Content-Based Retrieval of Complex Binary Images", in Proceedings of the 8th International Workshop on Content-Based Multimedia Indexing (CBMI 2010), pp. 182-187, Grenoble, France, 23-25 June 2010.
  93. S. Vrochidis, A. Moumtzidou, P. King, A. Dimou, V. Mezaris and I. Kompatsiaris, "VERGE: A video interactive retrieval engine", in Proceedings of the 8th International Workshop on Content-Based Multimedia Indexing (CBMI 2010), pp. 142-147, Grenoble, France, 23-25 June 2010. DOI: 10.1109/CBMI.2010.5529884
  94. S. Vrochidis, I. Kompatsiaris and I. Patras,"Exploiting Implicit User Feedback in Interactive Video Retrieval", in Proceedings of the 11th International Workshop on Image Analysis for Multimedia Interactive Services (WIAMIS 2010), Desenzano del Garda, Italy, April 2010. https://ieeexplore.ieee.org/document/5617661
  95. F. Bellotti, S. Vrochidis, M. Pellegrino, I. Tsampoulatidis, P. Lhoas, G. Bo, A. De Gloria, I. Kompatsiaris. "An Integrated Framework for Personalized t-learning". in Cases on Transnational Learning and Technologically Enabled Environments, pages 118-135, Siran Mukerji and Purnendu Tripathi (Editors), IGI Global, ISBN13: 9781615207497, 31 January 2010. OPEN ACCESS
  96. A. Moumtzidou, A. Dimou, P. King, S. Vrochidis, A. Angeletou, V. Mezaris, S. Nikolopoulos, I. Kompatsiaris, L. Makris, "ITI-CERTH participation to TRECVID 2009 HLFE and Search", Proc. TRECVID 2009 Workshop, November 2009, Gaithersburg, MD, USA.
  97. S. Vrochidis, P. King, L. Makris, A. Moumtzidou, S. Nikolopoulos, A. Dimou, V. Mezaris, I. Kompatsiaris, "MKLab Interactive Video Retrieval System", ACM International Conference on Image and Video Retrieval (CIVR09) - VideOlympics Showcase event, Santorini, Greece, July 2009. https://doi.org/10.1145/1646396.1646459
  98. S. Vrochidis, S. Papadopoulos, A. Moumtzidou, P. Sidiropoulos, E. Pianta, I. Kompatsiaris. "Towards Content-based Patent Image Retrieval; A Framework Perspective". World Patent Information Journal, Volume 32, Issue 2, pp 94-106, 27 June 2009. OPEN ACCESS
  99. S. Vrochidis, C. Doulaverakis, A. Gounaris, E. Nidelkou, L. Makris and I. Kompatsiaris. "A Hybrid Ontology and Visual-based Retrieval Model for Cultural Heritage Multimedia Collections". International Journal of Metadata, Semantics and Ontologies, Vol.3, No. 3, pp. 167-182, 28 February 2009. OPEN ACCESS
  100. F. Bellotti, S. Vrochidis, I. Tsampoulatidis, G. Bo and L. Napoletano, "A Learning Oriented Technological Framework for iDTV", 4th International Conference on Automated Solutions for Cross Media Content and Multi-channel Distribution (AXMEDIS 2008), Florence, Italy, 17-19 November 2008. DOI: 10.1109/AXMEDIS.2008.30
  101. Q. Zhang, G. Tolias, B. Mansencal, A. Saracoglu, N. Aginako, A. Alatan, L. A. Alexandre, Y. Avrithis, J. Benois-Pineau, K. Chandramouli, M. Corvaglia, U. Damnjanovic, A. Dimou, E. Esen, N. Fatemi, I. Garcia, F. Guerrin, A. Hanjalic, R. Jarina, P. Kapsalas, P. King, I. Kompatsiaris, L. Makris, V. Mezaris, P. Migliorati, A. Moumtzidou, Ph. Mylonas, U. Naci, S. Nikolopoulos, M. Paralic, T. Piatrik, F. Poulin, A. M. G. Pinheiro, L. Raileanu, E. Spyrou, S. Vrochidis, "COST292 experimental framework for TRECVID 2008", Proc. TRECVID 2008 Workshop, November 2008, Gaithersburg, MD, USA. https://doi.org/10.1145/1463563.1463569
  102. S. Vrochidis, F. Bellotti, G. Bo, Linda Napoletano and I. Kompatsiaris. "T-Learning Technologies", in Encyclopedia of Information Science and Technology (2nd Edition). Mehdi Khosrow-Pour (Editor), IGI Global, vol. VIII, pp. 3765-3771, 1 October 2008. OPEN ACCESS
  103. A. Ozolina, A. Kapenieks, B. Zuga, M. Jirgensons, F. Bellotti, S. Vrochidis, Y. Kompatsiaris, I. Tsampoulatidis. "Designing Attractive T-Learning Courses Applications for Interactive Digital TV". An-nual Proceedings of Vidzeme University College, ICTE in Regional Development, 2007, Valmiera, Latvia, pp 87-95, ISBN 9984-633-10-1. OPEN ACCESS
  104. F. Bellotti, S. Vrochidis, E. Parissi, P. Lhoas, D. Mathevon, M. Pellegrino, G. Bo and I. Kompatsiaris. "A T-learning Courses Development and Presentation Framework". IEEE Multidisciplinary Engineering Education Magazine, Vol 3, No 3, pp 69-76, 1 September 2008. OPEN ACCESS
  105. S. Vrochidis, P. King, L. Makris, A. Moumtzidou, V. Mezaris and I. Kompatsiaris, "MKLab Interactive Video Retrieval System", in the Proceedings of Conference On Image And Video Retrieval (CIVR'08), Niagra Falls, Canada, 7-9 July 2008, Pages: 563 - 563.
  106. F. Bellotti, S. Vrochidis, S. Ramel, I. Tsampoulatidis, P. Lhoas, M. Pellegrino, G. Bo and I. Kompatsiaris. "A Technological Framework for the Authoring and Presentation of T-learning Courses". International Journal of Emerging Technologies in Learning (iJET), Vol 3, No4, pp 10-19,15 June 2008. OPEN ACCESS
  107. J. Codina, E. Pianta, S. Vrochidis and S. Papadopoulos, "Integration of Semantic, Metadata and Image search engines with a text search engine for patent retrieval", Semantic Search 2008 Workshop, Tenerife, Spain, June 2, 2008.
  108. F. Bellotti, S. Vrochidis, E. Parissi, P. Lhoas, D. Mathevon, M. Pellegrino, G. Bo and I. Kompatsiaris, "A T-learning Courses Development and Presentation Framework", 3rd International Conference on Interactive Mobile and Computer Aided Learning, IMCL2008, April 16-18, 2008, Amman, Jordan.
  109. P. Wilkins, T. Adamek, D. Byrne, G. J. F. Jones, H. Lee, G. Keenan, K. McGuinness, N. E. O’Connor, A. F. Smeaton, A. Amin, Z. Obrenovic, R. Benmokhtar, E. Galmar, B. Huet, S. Essid, R. Landais, F. Vallet, G. Papadopoulos, S. Vrochidis, V. Mezaris, I. Kompatsiaris, E. Spyrou, Y. Avrithis, R. Morzinger, P. Schallauer, W. Bailer, T. Piatrik, K. Chandramouli, E. Izquierdo, M. Haller, L. Goldmann, A. Samour, A. Cobet, T. Sikora, P. Praks, "K-Space at TRECVid 2007", Presented at TRECVID 2007 Workshop, November 2007, Gaithersburg, MD, USA.
  110. S. Vrochidis, C. Doulaverakis, A. Gounaris, E. Nidelkou, L. Makris and I. Kompatsiaris, "A Hybrid Ontology and Visual-based Retrieval Model for Cultural Heritage Multimedia Collections", in Proceedings of 2nd International Conference on Metadata and Semantics Research, Metadata and Semantics, 11-12 October, Corfu, Greece, 2007, Springer US, pp. 1-10. https://doi.org/10.1007/978-0-387-77745-0_1
  111. S. Vrochidis, C. Doulaverakis, L. Makris, A. Gounaris, E. Nidelkou, I. Kompatsiaris and M. G. Strintzis, "Hybrid Ontology and Visual-based Retrieval for Cultural Heritage Multimedia Libraries", in 14th International Conference of Image Analysis and Processing - Workshops, 10-13 September 2007, Modena, Italy. DOI: 10.1109/ICIAPW.2007.28
  112. S. Vrochidis, V. Mezaris and I. Kompatsiaris, "ITI interactive video retrieval system", in Conference On Image And Video Retrieval, Proceedings of the 6th ACM international, Amsterdam, The Netherlands, July 2007, p. 648. https://doi.org/10.1145/1282280.1282375
  113. J. Calic, P. Kramer, U. Naci, S. Vrochidis, S. Aksoy, Q. Zhang, J. Benois-Pineau, A. Saracoglu, C. Doulaverakis, R. Jarina, N. Campbell, V. Mezaris, I. Kompatsiaris, E. Spyrou, G. Koumoulos, Y. Avrithis, A. Dalkilic, A. Alatan, A. Hanjalic, E. Izquierdo, "COST292 experimental framework for TRECVID 2006", in 4th TRECVID Workshop, Gaithersburg, USA, November 2006.