Multimedia Knowledge and Social Media Analytics Laboratory

Nikolopoulos Spiros

nikolopo@iti.gr

Dr. Spiros Nikolopoulos received his diploma degree in Computer Engineering and Informatics and the MSc degree in Computer Science & Technology from university of Patras, Greece in 2002 and 2004 respectively. He also holds a PhD degree on Semantic multimedia analysis using knowledge and context, Queen Mary University of London (2012). He is currently a post-doctoral research fellow in Information Technlogies Institute (ITI) at the Centre for Research & Technology Hellas (CERTH). His research interests include image analysis, indexing and retrieval, knowledge-assisted multimedia analysis, social media analysis, smartcity applications and augmented reality. His scientific work has been published in peer-reviewed journals, international conferences and book chapters.

Key Publications: 

Elisavet Chatzilari, Spiros Nikolopoulos, Yiannis Kompatsiaris, Josef Kittler, "SALIC: Social Active Learning for Image Classification", in IEEE Transactions on Multimedia, vol. 18, no. 8, pp. 1488-1503, Aug. 2016. doi: 10.1109/TMM.2016.2565440 [url] [code]

D. Ververidis, S. Nikolopoulos, I. Kompatsiaris, "Transforming your website to an augmented reality view", Proc. of the 14th IEEE International Symposium on Mixed and Augmented Reality, Fukuoka, Japan, 29 Sep - 3 Oct, 2015

A. Maronidis, E. Chatzilari, S. Nikolopoulos, I. Kompatsiaris, Scalable Image Annotation Using a Product Compressive Sampling Approach, IEEE DSAA 2015, Paris, 19-21 October 2015

G. Chantas, A. Kitsikidis, S. Nikolopoulos, K. Dimitropoulos, S. Douka, I. Kompatsiaris, and N. Grammalidis "Multi-entity bayesian networks for knowledge-driven analysis of ICH content", Proc. 1st International Workshop on Computer vision + ONTology Applied Cross-disciplinary Technologies at ECCV 2014, Zurich, Switzerland, September 7th, 2014

Elisavet Chatzilari, Spiros Nikolopoulos, Yiannis Kompatsiaris, Josef Kittler, "How many more images do we need? Performance Prediction of bootstrapping for Image Classification", Proc. IEEE Int. Conf. on Image Processing (ICIP 2014), Paris, France, 27-30 October 2014

S. Nikolopoulos, S. Zafeiriou, I. Patras and I. Kompatsiaris, "High-order pLSA for indexing tagged images", Signal Processing Elsevier, Special Issue on Indexing of Large-Scale Multimedia Signals, Volume 93, Issue 8, August 2013, Pages 2212-2228, author's accepted manuscript

E. Chatzilari, S. Nikolopoulos, I. Patras, I. Kompatsiaris, "Leveraging social media for scalable object detection", Pattern Recognition, Volume 45, Issue 8, August 2012, Pages 2962-2979, DOI: 10.1016/j.patcog.2012.02.006.

C. Lakka, S. Nikolopoulos, C. Varytimidis and I. Kompatsiaris, “A bayesian network modeling approach for cross media analysis”, Signal Processing: Image Communication 26 (2011) 175–193, DOI: 10.1016/j.image.2011.01.004.

S. Nikolopoulos, G. Th. Papadopoulos, I. Kompatsiaris and I. Patras, "Evidence driven image interpretation by combining implicit and explicit knowledge in a bayesian network”, IEEE Transactions on Systems, Man and Cybernetics – Part B: Cybernetics, vol.41, no.5, pp.1366-1381, Oct. 2011. DOI: 10.1109/TSMCB.2011.2147781 .

I. Tsampoulatidis, D. Ververidis, P. Tsarchopoulos, S. Nikolopoulos, I. Kompatsiaris and N. Komninos, “ImproveMyCity - An open source platform for direct citizen-government communication”, The 21st ACM International Conference on Multimedia – Open Source Software Competition, Barcelona, Catalunya, Spain, October 21-25, 2013. 

E. Chatzilari, S. Nikolopoulos, Y. Kompatsiaris, J. Kittler. "Multi-Modal Region Selection Approach for Training Object Detectors", In Proceedings of the 2nd ACM International Conference on Multimedia Retrieval (ICMR '12). ACM, New York, NY, USA, , Article 5 , 8 pages. DOI=10.1145/2324796.2324803.

Elisavet Chatzilari, Panagiotis Baliakas, Aliki Xochelli, Anastasios Maronidis, Anna Vardi, Mattias, Mattsson, Karin Larsson, Vassiliki Douka, Michail Iskas, George Karavalakis, Apostolia Papalexandri, Carsten Niemann, Marco Montillo, Achilles Anagnostopoulos, David Oscier, Sarka Pospisilova, Frederic Davi, Niki Stavroyianni, Paolo Ghia, Anastasia Hadzidimitriou, Richard Rosenquist, Spiros Nikolopoulos, Kostas Stamatopoulos and Yannis Kompatsiaris, "Personalized Modeling of Disease Evolution in CLL: Does Statistical Significance Translate into Predictive Accuracy?", American Society of Hematology (ASH) 2015.