Big Data processing and analytics

Spatial, textual and visual data are ubiquitous and are massively generated by cameras, satellites, sensors and humans. Clustering large and semi-structured data is a very popular pattern recognition problem in the Big Data era, that aims to support data management and grouping into topics. Our research focus is to identify groups of textual and/or visual content that pose a high semantic relevance within each group and low similarity between different groups of documents, i.e. news articles, short texts, social images, satellite images, etc. The estimation of the number of topics to detect is a computationally complex problem that requires effective parallel programming methods and efficient computational resources, such as cloud and High Performance Computing environments.

PROJECTS

PUBLICATIONS

  1. K. Loumponias, S. Raptis, E. Darra, T. Tsikrika, S. Vrochidis, I. Kompatsiaris, "Forecasting Cyber-Attacks to Destination Ports Using Machine Learning", 9th International Conference on Information Systems Security and Privacy (ICISSP), 22-24 February, 2023, Lisbon, Portugal
  2. K. Vlachos, A. Moumtzidou, I. Gialampoukidis, S. Vrochidis, I. Kompatsiaris, "A tempοral Deep Convolutional Neural Network model on Sentinel-1 Image Time Series for pixel-wise Flood Classification". In Proceedings of the 2022 IEEE International Geoscience and Remote Sensing Symposium (IGARSS 2022), Kuala Lumpur, Malaysia, 17-22 July 2022, Physical, IEEE. OPEN ACCESS
  3. I. Gialampoukidis, S. Andreadis, N. Pantelidis, S. Hayat, L. Zhong, M. Bakratsas, D. Hoppe, S. Vrochidis, and I. Kompatsiaris, "Parallel DBSCAN-Martingale estimation of the number of concepts for automatic satellite image clustering", In Proceedings of the 28th International Conference on Multimedia Modelling (MMM2022), Phu Quoc, Vietnam, 6-10 June, 2022. OPEN ACCESS
  4. M. Sdraka, I. Papoutsis, B. Psomas, K. Vlachos, K. Ioannidis, K. Karantzalos, I. Gialampoukidis, S. Vrochidis, "Deep Learning for Remote Sensing Image Downscaling: Fusion and Super-Resolution", IEEE Geoscience and Remote Sensing Magazine, Pages: 2 - 55, 02 June 2022, DOI: 10.1109/MGRS.2022.3171836. OPEN ACCESS
  5. D. F. Mantsis, M. Bakratsas, K. Vlachos, A. Moumtzidou, I. Gialampoukidis, S. Vrochidis, I. Kompatsiaris "Detection of oil spills in an inland lake using Multi-Spectral Satellite Images". In Proceedings of the 2022 Living Planet Symposium, 23-27 May 2022, Bonn, Germany. OPEN ACCESS
  6. G. Antzoulatos, C. Mourtzios, P. Stournara, I.O. Kouloglou, N. Papadimitriou, D. Spyrou, A. Mentes, E. Nikolaidis, A. Karakostas, D. Kourtesis, S. Vrochidis, I. Kompatsiaris. "Making Urban Water Smart: The SMART-WATER solution", Special Issue "Making water smart – preparing the water sector for the data and autonomy revolution", Water Science & Technology, Volume 82, Issue 12, 18 August 2020 OPEN ACCESS
  7. A. Moumtzidou, G. Orfanidis, S. Andreadis, K. Ioannidis, I. Gialampoukidis, S. Vrochidis, I. Kompatsiaris. A space-based solution for oil spill detection. NEREUS/ESA/EC “The Ever Growing use of Copernicus across Europe’s Regions” (p. 277). OPEN ACCESS
  8. A. Chatzimichail, A. Tsanousa, G. Meditskos, S. Vrochidis, and I. Kompatsiaris, "RSSI Fingerprinting Techniques for Indoor Localization Datasets", in International Conference on Interactive Mobile Communication, Technologies and Learning, Thessaloniki, Greece October 31- November 01, 2019. https://doi.org/10.1007/978-3-030-49932-7_45
  9. 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
  10. L. Gale, B. Valentin, G. Vingione, G. Scarpino, H. Boulahya, D. Hoppe, I. Gialampoukidis, S. Andreadis, S. Vrochidis, I. Kompatsiaris, L. Zhong, M. Ferri, D. Norbiato, F. Zaffanella, L. Marzell, T. Pettengell, A. Karppinen, J. Tyynela, P. Karsisto, H. Yoon, "H2020 EOPEN Easing Copernicus data & services exploitation", 40th Asian Conference on Remote Sensing (ACRS 2019), Daejeon, Korea, 2019. OPEN ACCESS
  11. M. Krestenitis, G. Orfanidis, K. Ioannidis, K. Avgerinakis, S. Vrochidis and I. Kompatsiaris. "Oil Spill Identification from Satellite Images Using Deep Neural Networks". Remote Sensing, 11(15), 1762, 26 July 2019. OPEN ACCESS
  12. 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
  13. I. Gialampoukidis, S. Vrochidis, I. Kompatsiaris, and I. Antoniou. “Probabilistic density-based estimation of the number of clusters using the DBSCAN-martingale process”. Pattern Recognition Letters, Vol. 123, pp 23-30, 4 March 2019. OPEN ACCESS
  14. G. Vingione, G. Scarpino, L. Marzell, T. Pettengell, I. Gialampoukidis, S. Andreadis, S. Vrochidis, I. Kompatsiaris, B. Valentin, L. Gale, W.-K. Lee, W. Lee, M. Gienger, D. Hoppe, V. Sitokonstantinou, I. Papoutsis, C. Kontoes, F. Baruffi, M. Ferri, H. Yoon, A. Karppinen and A.-M. Harri, "EOPEN: Open interoperable platform for unified access and analysis of earth observation data", in Proc. of the 2019 conference on Big Data from Space (BiDS’19), pp. 1–4, Munich, Germany, 2019. https://data.europa.eu/doi/10.2760/848593 OPEN ACCESS
  15. G. Vingione, L. Marzell, E. Cadau., I. Gialampoukidis, S. Vrochidis, I. Kompatsiaris, B. Valentin, M. Melcott, L. Gale, W.-K. Lee, S. Woo, M. Gienger, D. Hoppe, C. Kontoes, I. Papoutsis, M. Ferri, F. Baruffi, J. Yoon, H. Yoon, A. Karppinen, A.-M. Harri, "THE H2020-EO EOPEN PROJECT", in INSPIRE Conference 2018, 18-21 September 2018, Antwerp, Belgium (poster presentation). OPEN ACCESS
  16. E. Michail, A. Moumtzidou, I. Gialampoukidis, K. Avgerinakis, M. G. Scarpino, S. Vrochidis, G. Vingione, I. Kompatsiaris, K. Labbassi, M. Menenti, F.-E. Elghandour, "Testing a Flood Mask Correction Method Of Optical Satellite Imagery Over Irrigated Agricultural Areas", in 2nd Mapping Water Bodies from Space Conference (MWBS2018), 27-28 March 2018, ESA-ESRIN Frascati, Italy. OPEN ACCESS
  17. G. Vingione, L. Marzell, E. Cadau., I. Gialampoukidis, S. Vrochidis, I. Kompatsiaris, B. Valentin, M. Melcott, L. Gale, W.-K. Lee, S. Woo, M. Gienger, D. Hoppe, C. Kontoes, I. Papoutsis, M. Ferri, F. Baruffi, J. Yoon, H. Yoon, A. Karppinen, A.-M. Harri, "The H2020-EO EOPEN project", ESA Conference on Big Data from Space 2017, 28-30 November 2017, Toulouse, France. OPEN ACCESS