Defense

Research towards AI technologies that facilitate everyday life has strongly emerged during the last years in order to modernize operations and optimize productivity in a wide range of sectors and applications. When referring to the defense domain, AI technologies pose additional challenges, as security matters are under serious consideration to avoid any undesirable disclosure of sensitive information. Data frugality, adaptation in new environments, continuous learning are some of the specificities of the Defense domain that AI technologies need to address.

M4D group combines research from various domains and techniques in order to adapt and reuse already existing developments that can also satisfy the needs of the domain sector. More specifically, M4D performs research activities towards the development of frugal models that can be trained with the use of less or no annotated data via different learning paradigms, in order to tackle the scarcity or unsuitability of training data. In addition, the group’s research experience in fusion techniques will contribute to extract additional knowledge of the outcomes of different modalities in a complementary manner, and provide improved situational awareness and decision supporting schemas to the operators.

Processing of complex data streams

PROJECTS

PUBLICATIONS

  1. Michail, E., Bozas, A., Stefanopoulos, D., Paspalakis, S., Orfanidis, G., Moumtzidou, A., Gialampoukidis I., Ioannidis K., Vrochidis S., Kompatsiaris I. "Incorporating Social Media Sensing and Computer Vision Technologies to Support Wildfire Monitoring". In Proceedings of the 2024 IEEE International Geoscience and Remote Sensing Symposium (IGARSS 2024), Athens, Greece, 07-12 July 2024, Physical, IEEE, pp. 2082-2085.
  2. Michail, E., Giannakeris, P., Koulalis, I., Vrochidis, S. and Kompatsiaris, I. (2024). Innovative Visual Analysis Solutions to Support Disaster Management. In Responding to Extreme Weather Events (eds D. Sempere-Torres, A. Karakostas, C. Rossi and P. Quevauviller). https://doi.org/10.1002/9781119741374.ch10
  3. Masa, P.; Kintzios, S.; Vasileiou, Z.; Meditskos, G.; Vrochidis, S.; Kompatsiaris, I. A Semantic Framework for Decision Making in Forest Fire Emergencies. Appl. Sci. 2023, 13, 9065. https://doi.org/10.3390/app13169065 OPEN ACCESS
  4. Symeonidis, S., Samaras, S., Stentoumis, C., Plaum, A., Paccelli, M.,Grivolla, J., Shekhawat, Y., Ferri, M., Diplaris, S. & Vrochidis, S. (2023). "An Extended Reality system for situation awareness in flood management and media production planning", Electronics,2023, 12(12), 2569; https://doi.org/10.3390/electronics12122569 OPEN ACCESS
  5. Stelios Andreadis, Ilias Gialampoukidis, Andrea Manconi, David Cordeiro, Vasco Conde, Manuela Sagona, Fabrice Brito, Nick Pantelidis, Thanassis Mavropoulos, Nuno Grosso, Stefanos Vrochidis, Ioannis Kompatsiaris (2022). Earthquakes: From Twitter detection to EO data processing. IEEE Geoscience and Remote Sensing Letters, 19, 1-5. OPEN ACCESS
  6. Z.Vasileiou, G.Meditskos, S.Vrochidis, N.Bassiliades, "An Explainable Intervention Prediction for Trauma Patients", Semantic Web Applications and Tools for Health Care and Life Sciences (SWAT4HCLS), 13-16 February 2023, Basel Switzerland (Poster).
  7. P. Masa, G.Tzanetis, S. Kintzios, G. Meditskos, S. Vrochidis, I. Vourvachis, L. Nerantzis, I. Kompatsiaris, " Ontology-based technologies for disaster preparedness, response and recovery", in the Proceedings of the 9th International Conference on Civil Protection & New Technologies (SafeThessaloniki 2022), 29 September - 1 October 2022, Thessaloniki, Greece. OPEN ACCESS
  8. G. Sakkas, V. Varela, I. Vourvachis, A. Giordanis, S. Andreadis, I. Gialampoukidis, S. Vrochidis, I. Kompatsiaris, K. Demestichas, S. Kaloudis, R. Kechri, K. Meletis, “SILVANUS: An Integrated Technological and Information Platform for Wildfire Management – North Evia Pilot Area” SafeThessaloniki 2022, 29 September - 1 October 2022, Thessaloniki, Greece. OPEN ACCESS
  9. P. Masa, G. Meditskos, S. Kintzios, S. Vrochidis, I. Kompatsiaris, "Ontology-based Modelling and Reasoning for Forest Fire Emergencies in Resilient Societies", 12th EETN Conference on Artificial Intelligence (SETN 2022), September 7-9 2022, Corfu, Greece.
  10. Z. Vasileiou, G. Meditskos, S. Vrochidis, N. Bassiliades, "An Explainable Multimodal Fusion Approach for Mass Casualty Incidents". In Proceedings of the 4th International Workshop on Machine Learning and Knowledge Graphs At 33rd  International Conference on Database and Expert Systems Applications, DEXA 2022, August 22-24, 2022, Vienna, Austria. OPEN ACCESS
  11. S. Andreadis, N. Pantelidis, I. Gialampoukidis, S. Vrochidis, and I. Kompatsiaris, "Water quality issues: Can we detect a creeping crisis with social media data?", In the proceedings of the 27th IEEE Symposium on Computers and Communications (IEEE ISCC 2022), 30 June - 3 July 2022, Rhodes, Greece.
  12. T. Papadimos, N. Pantelidis, S. Andreadis, A. Bozas, I. Gialampoukidis, S. Vrochidis, and I. Kompatsiaris, "Real-time Alert Framework for Fire Incidents Using Multimodal Event Detection on Social Media Streams". In Proceedings of the 19th International Conference on Information Systems for Crisis Response and Management, 22-25 May 2022, Tarbes, France. OPEN ACCESS © © 2022 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
  13. N., Mengidis, T., Tsikrika, S., Vrochidis, I., Kompatsiaris (2021) "Cybersecurity in Next Generation Energy Grids: Challenges and Opportunities for Blockchain and AI Technologies". In Tagarev T., Atanassov K.T., Kharchenko V., Kacprzyk J. (eds) Digital Transformation, Cyber Security and Resilience of Modern Societies. Studies in Big Data, vol 84. Springer, Cham. DOI:https://doi.org/10.1007/978-3-030-65722-2_18. OPEN ACCESS
  14. G. Antzoulatos, I. Kouloglou, M. Bakratsas, A. Moumtzidou, I. Gialampoukidis, A. Karakostas, F. Lombardo, R. Fiorin, D. Norbiato, M. Ferri, A. Symeonidis, S. Vrochidis, I. Kompatsiaris, "Flood Hazard and Risk Mapping by Applying an Explainable Machine Learning Framework Using Satellite Imagery and GIS Data". Special Issue: Environmental Water Monitoring for Sustainable Development in Urban and Rural Areas of Sustainability, Volume 14, Issue 6, 2022. DOI:10.3390/su14063251. OPEN ACCESS
  15. S. Andreadis, I. Gialampoukidis, A. Bozas, A. Moumtzidou, R. Fiorin, F. Lombardo, A. Karakostas, D. Norbiato, S. Vrochidis, M. Ferri, and I. Kompatsiaris, "WaterMM: Water Quality in Social Multimedia Task at MediaEval 2021". In Proceedings of the MediaEval 2021 Workshop (MediaEval'21), 12-15 December 2021.
  16. Α.-Μ., Koufakis, S., Tzanakis, A., Moumtzidou, G., Meditskos, A., Karakostas, S., Vrochidis, I., Kompatsiaris, "OntoAqua: Ontology-based Modelling of Context in Water Safety and Security", In proceedings of the 13th International Conference on Knowledge Engineering and Ontology Development-KEOD 2021, Valletta, Malta, 25-27 October 2021.
  17. P. Masa , G. Meditskos, A. Karakostas , S. Vrochidis, I. Kompatsiaris, "On the Use of Semantic Web Technologies for Forest Fire Emergencies in Resilient Societies", In Proceedings of the 2021 International Conference on Security and Management (SAM'21), Las Vegas, USA, July 26-29, 2021. OPEN ACCESS
  18. I. Gialampoukidis, S. Andreadis, S. Vrochidis, and I. Kompatsiaris, "Multimodal data fusion of social media and satellite images for emergency response and decision-making", 2021 IEEE International Geoscience and Remote Sensing Symposium (IGARSS 2021), 11 July 2021, Online, pp. 228-231, IEEE. OPEN ACCESS
  19. S. Symeonidis, S. Diplaris, N. Heise, T. Pistola, A. Tsanousa, G. Tzanetis, E. Batziou, C. Stentoumis, I. Kalisperakis, S. Freitag, Y. Shekhawat, R. Paradiso, M. Pacelli, J. Codinak, S. Millek, M. Marimonk, M. Ferri, D. Norbiato, M. Monego, A. Karakostas and S. Vrochidis, "xR4DRAMA: Enhancing situation awareness using immersive (XR) technologies". In 2021 IEEE International Conference on Intelligent Reality (ICIR), Piscataway, NJ, USA, 2021, pp. 1-8. https://doi.org/10.1109/ICIR51845.2021.00010
  20. G. Orfanidis, K. Ioannidis, A. Tefas, S. Vrochidis, Y. Kompatsiaris, "A modified Single-Shot multibox Detector for beyond Real-Time Object Detection", 25th International Conference on Pattern Recognition, (ICPR 2020), 10 & 15 January 2021, Milan, Italy.
  21. A. Chatzimichail, E. A. Stathopoulos, D. Ntioudis, A. Tsanousa, M. Rousi, A. Mavropoulos, G. Meditskos, S. Vrochidis and I. Kompatsiaris. “IoT and Semantic Web Technologies”. Semantic IOT: Theory and Applications - Interoperability, Provenance and Beyond, Book series: Studies in Computational Intelligence, Springer, 2020, p. 3-33. OPEN ACCESS
  22. G. Antzoulatos, P. Giannakeris, I. Koulalis, A. Karakostas, S. Vrochidis, I. Kompatsiaris, "A Multi-Layer Fusion Approach For Real-Time Fire Severity Assessment Based on Multimedia Incidents", in Proceedings of the 17th ISCRAM Conference – Blacksburg, VA, USA May 2020, Amanda Lee Hughes, Fiona McNeil and Christopher Zobel (eds.), 2020. OPEN ACCESS
  23. A. Moumtzidou, M. Bakratsas, S. Andreadis, A. Karakostas, I. Gialampoukidis, S. Vrochidis, I. Kompatsiaris, "Flood detection with Sentinel-2 satellite images in crisis management systems", in 17th International Conference on Information Systems for Crisis Response and Management (ISCRAM 2020), Blacksburg, Virginia, USA, 24-27 May 2020. OPEN ACCESS
  24. G. Orfanidis, S. Apostolidis, G. Prountzos, M. Riga, A. Kapoutsis, K. Ioannidis, E. Kosmatopoulos, S. Vrochidis, I. Kompatsiaris, "Border surveillance using computer vision enabled robotic swarms for semantically enriched situational awareness", in Mediterranean Security Event 2019 (MSE2019) 29th and the 31st of October 2019 Heraklion, Greece. OPEN ACCESS
  25. G. Antzoulatos, I. Koulalis, A. Karakostas, S. Vrochidis, I. Kompatsiaris, “Towards to integrate a multi-layer Machine Learning Data Fusion approach into Crisis Classification and Risk Assessment of extreme natural events”. In "Technology Development for Security Practitioners", edited by B. Akhgar, D. Kavallieros, E. Sdongos, Book series: Security Informatics and Law Enforcement, Springer, 2021. OPEN ACCESS
  26. S. Andreadis, M. Bakratsas, P. Giannakeris, A. Moumtzidou, I. Gialampoukidis, S. Vrochidis, I. Kompatsiaris, "Multimedia Analysis Techniques for Flood Detection Using Images, Articles and Satellite Imagery", in Proceedings of the Working Notes Proceeding MediaEval Workshop, 27-29 October 2019, Sophia Antipolis, France. OPEN ACCESS
  27. M. Mpakratsas, A. Moumtzidou, I. Gialampoukidis, S. Vrochidis, I. Kompatsiaris, "A Deep Neural Network Slope Reduction Model on Sentinel-1 Images for Water Mask Extraction", 40th Asian Conference on Remote Sensing (ACRS 2019), Daejeon, Korea, 2019. OPEN ACCESS
  28. P. Hertweck, J. Mossgraber, E. Kontopoulos, P. Mitzias, T. Hellmund, A. Karakostas, D. Hilbring, H. van der Schaaf, S. Vrochidis, J.-W. Blume and I. Kompatsiaris. “The Backbone of Decision Support Systems: The Sensor to Decision Chain”. IJISCRAM 10.4: 65-87. Web. 29 August 2019. OPEN ACCESS
  29. G. Antzoulatos, A. Karakostas, S. Vrochidis, I. Kompatsiaris, "The Crisis Classification component to strengthen the early warning, risk assessment and decision support in extreme climate events", in Proceedings in 4th International Conference on Dynamic of Disasters - DOD 2019, Kalamata, 2019.
  30. A. Moumtzidou, M. Bakratsas, S. Andreadis, I. Gialampoukidis, S. Vrochidis and I. Kompatsiaris,"Road passability estimation using deep neural networks and satellite image patches", in Proc. of the 2019 conference on Big Data from Space (BiDS’19), Munich, Germany, 2019, pp. 1–4. OPEN ACCESS
  31. S. Andreadis, I. Gialampoukidis, R. Fiorin, F. Lombardo, D. Norbiato, A. Karakostas, M. Ferri, S. Vrochidis and I. Kompatsiaris, "Social Media Observations for Flood Event Monitoring in Italy over a One-Year Period", in 2nd International Conference Citizen Observatories for natural hazards and Water Management (COWM 2018), 27-30 November 2018, Venezia, Italy. OPEN ACCESS
  32. I. Gialampoukidis, A. Moumtzidou, M. G. Scarpino, G. Palumbo, S. Vrochidis, I. Kompatsiaris, F. Zaffanella, D. Norbiato, M. Ferri, & G.Vingione, "Earth Observation and Social Multimedia Data Fusion for Natural Hazards and Water Management: The H2020 EOPEN Project Paradigm", in 2nd International Conference Citizen Observatories for natural hazards and Water Management, Venice, 2018. OPEN ACCESS
  33. G. S. Antzoulatos, A. Karakostas, S. Vrochidis, F. Lombardo, D. Norbiato, M. Ferri, I. Kompatsiaris, "A Crisis Classification System for flood risk assessment: the beAWARE project", in 2nd International Conference Citizen Observatories for natural hazards and Water Management (COWM 2018), 27-30 November 2018, Venezia, Italy. OPEN ACCESS
  34. E. Kontopoulos, P. Mitzias, S. Dasiopoulou, J. Mossgraber, S. Mille, P. Hertweck, T. Hellmund, A. Karakostas, S. Vrochidis, L. Wanner, I. Kompatsiaris, "Applying Semantic Web Technologies for Decision Support in Climate-Related Crisis Management", in 2nd International Conference Citizen Observatories for natural hazards and Water Management (COWM 2018), 27-30 November 2018, Venezia, Italy. 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. G. Orfanidis, K. Ioannidis, K. Avgerinakis, S. Vrochidis and I. Kompatsiaris, "A deep neural network for oil spill semantic segmentation in SAR images", in IEEE Int. Conf. on Image Processing (ICIP 2018), Athens, Greece, October 2018. OPEN ACCESS
  37. P. Zhu, L. Wen, D. Du, X. Bian, H. Ling, Q. Hu, Q. Nie, H. Cheng, C. Liu, X. Liu, W. Ma, H. Wu, L. Wang, A. Schumann, C. Brown, C. Qian, C. Li, D. Li, E. Michail, F. Zhang, F. Ni, F. Zhu, G. Wang, H. Zhang, H. Deng, H. Liu, H. Wang, H. Qiu, H. Qi, H. Shi, H. Li, H. Xu, H. Lin, I. Kompatsiaris, J. Cheng, J. Wang, J. Yang, J. Zhou, J. Zhao, KJ. Joseph, K. Duan, K. Suresh, K. Bo, K. Wang, K. Avgerinakis, L. Sommer, L. Zhang, L. Yang, L. Cheng, L. Ma, L. Lu, L. Ding, M. Huang, N. K. Vedurupaka, N. Mamgain, N. Bansal, O. Acatay, P. Giannakeris, Q. Wang, Q. Zhao, Q. Huang, Q. Liu, Q. Cheng, Q. Sun, R. Laganire, S. Jiang, S. Wang, S. Wei, S. Wang, S. Vrochidis, S. Wang, T. Lee, U. Sajid, V. N. Balasubramanian, W. Li, W. Zhang, W. Wu, W. Ma, W. He, W. Yang, X. Chen, X. Sun, X. Luo, X. Lian, X. Li, Y. Kuai, Y. Li, Y. Luo, Y. Zhang, Y. Liu, Y. Li, Y. Wang, Y. Wang, Y. Wu, Y. Fan, Y. Wei, Y. Zhang, Z. Wang, Z. Wang, Z. Xia, Z. Cui, Z. He, Z. Deng, Z. Guo and Z. Song,“Visdrone-det2018: The vision meets drone object detection in image challenge results”, in Proceedings of the European Conference on Computer Vision (ECCV). 2018.
  38. L. Wen, P. Zhu, D. Du, X. Bian, H. Ling, Q. Hu, C. Liu, H. Cheng, X. Liu, W. Ma, Q. Nie, H. Wu, L. Wang, A. G. Perera, B. Zhang, B. Heo, C. Liu, Do. Li, E. Michail, H. Chen, H. Liu, H. Li, I. Kompatsiaris, J. Cheng, J. Fan, J. Zhang, J. Y. Choi, J. Li, J. Yang, J. Choi, J. Zhao, J. Han, K. Zhang, K. Duan, K. Song, K. Avgerinakis, K. Lee, L. Ding, M. Lauer, P. G., P. Zhang, Q. Wang, Q. Xu, Q. Huang, Q. Liu, R. Laganire, R. Zhang, S. Yun, S. Zhu, S. Wu, S. Vrochidis, W. Tian, W. Zhang, W. Chen, W. Hu, W. Wang, W. Zhang, W. Ding, Xi. He, X. Li, X. Zhang, X. Luo, X. Hu, Y. Meng, Y. Kuai, Y. Zhao, Y. Li, Y. Yang, Y. Zhang, Y. Wang, Y. Qi, Z. Deng, and Z. He,“VisDrone-SOT2018: The Vision Meets Drone Single-Object Tracking Challenge Results”, In Proceedings of the European Conference on Computer Vision (ECCV). 2018.
  39. P. Zhu, L. Wen, D. Du, X. Bian, H. Ling, Q. Hu, H. Wu, Q. Nie, H. Cheng, C. Liu, X. Liu, W. Ma, L. Wang, A. Schumann, D. Wang, D. Ortego, E. Luna, E. Michail, E. Bochinski, F. Ni, F. Bunyak, G. Zhang, G. Seetharaman, G. Li, H. Yu, I. Kompatsiaris, J. Zhao, J. Gao, J. M. Martinez, J. C. San Miguel, K. Palaniappan, K. Avgerinakis, L. Sommer, M. Lauer, M. Liu, N. M. Al-Shakarji, O. Acatay, P. Giannakeris, Q. Zhao, Q. Ma, Q. Huang, S. Vrochidis, T. Sikora, T. Senst, W. Song, W. Tian, W. Zhang, Y. Zhao, Y. Bai, Y. Wu, Y. Wang, Y. Li, Z. Pi and Z. Ma,“VisDrone-VDT2018: The vision meets drone video detection and tracking challenge results”, in Proceedings of the European Conference on Computer Vision (ECCV). 2018.
  40. A. Karakostas, S. Vrochidis, Y. Kompatsiaris, B. Kantsepolsky, J. Mossgraber, S. Dasiopoulou, B. Mandler, A. Karppinen, M. Ferri, I. Vourvachis, C. Castro, K. Lintrup, "beWARE: Enhancing Decision Support and Management Services in Extreme Weather Climate Events", In proceedings of Enviroinfo 2018, Shaker-Verlag. https://beaware-project.eu/wp-content/uploads/2018/08/factsheet_v2.pdf
  41. D. C. Hilbring, J. Mossgraber, P. Hertweck, T. Hellmund, H. van der Schaaf, A. Karakostas, E. Kontopoulos, I. Gialampoukidis, S. Andreadis, S. Vrochidis, I. Kompatsiaris, "Harmonizing Data Collection in an Ontology for a Risk Management Platform", in proceedings of Enviroinfo 2018, Shaker-Verlag.
  42. S. Andreadis, A. Moumtzidou, I. Gialampoukidis, S. Vrochidis and I. Kompatsiaris, "A Flood Monitoring Tool for Urban Areas Using Satellite, Weather and Social Data", in US-Serbia & West Balkan Data Science Workshop 2018 - Big Data and Critical Infrastructures, 26-28 August 2018, Belgrade, Serbia. (poster presentation) OPEN ACCESS
  43. P. Giannakeris, V. Kaltsa, K. Avgerinakis, A. Briassouli, S. Vrochidis and I. Kompatsiaris,"Speed Estimation and Abnormality Detection from Surveillance Cameras'', in CVPRW NVIDIA AI City Challenge, 2018.
  44. P. Giannakeris, K. Avgerinakis, A. Karakostas, S. Vrochidis and I. Kompatsiaris, "People and vehicles in danger - A fire and flood detection system in social media", in 13th Workshop on IEEE Image, Video, and Multidimensional Signal Processing (IVMSP 2018), 10-12 June 2018, Zagori, Greece. OPEN ACCESS
  45. E. Kontopoulos, P. Mitzias, J. Mossgraber, P. Hertweck, H. van der Schaaf, X. Hilbring, F. Lombardo, D. Norbiato, M. Ferri, A. Karakostas, S. Vrochidis, I. Kompatsiaris,"Ontology-based Representation of Crisis Management Procedures for Climate Events", in 1st International Workshop on Intelligent Crisis Management Technologies for Climate Events (ICMT 2018), collocated with the 15th International Conference on Information Systems for Crisis Response and Management (ISCRAM 2018). OPEN ACCESS
  46. J. Mossgraber, D. Hilbring, H. van der Schaaf, P. Hertweck, E. Kontopoulos, P. Mitzias, I. Kompatsiaris, S. Vrochidis, A. Karakostas, "The Sensor to Decision Chain in Crisis Management", In Int. Conf. on Information Systems for Crisis Response and Management (ISCRAM'18). OPEN ACCESS
  47. A. Moumtzidou, S. Andreadis, I. Gialampoukidis, A. Karakostas, S. Vrochidis and I. Kompatsiaris, "Flood relevance estimation from visual and textual content in social media streams", in WWW 2018 Workshop on Exploitation of Social Media for Emergency Relief and Preparedness (SMERP), 23 April 2018, Lyon, France. OPEN ACCESS
  48. 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
  49. 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.
  50. K. Avgerinakis, P. Giannakeris, A. Briassouli, A. Karakostas, S. Vrochidis, I. Kompatsiaris, "LBP-flow and hybrid encoding for real-time water and fire classification", in ICCV-MSF 2017, IEEE/ISPRS 4th Joint Workshop on Multi-Sensor Fusion for Dynamic Scene Understanding. DOI: 10.1109/ICCVW.2017.56
  51. K. Avgerinakis, P. Giannakeris, A. Briassouli, A. Karakostas, S. Vrochidis, I. Kompatsiaris, "Intelligent traffic city management from surveillance systems (CERTH-ITI)", in NVIDIA AI city challenge, IEEE Smart World, Aug. 2017, USA.