CERTH @ MediaEval 2011 Social Event Detection Task

TitleCERTH @ MediaEval 2011 Social Event Detection Task
Publication TypeConference Paper
Year of Publication2011
AuthorsPapadopoulos, Symeon, Christos Zigkolis, Yiannis Kompatsiaris, and Athena Vakali
EditorLarson, Martha, Adam Rae, Claire-Helene Demarty, Christoph Kofler, Florian Metze, Raphaël Troncy, Vasileios Mezaris, and Gareth J. F. Jones
Book TitleMediaEval

This paper describes the participation of CERTH in the “SocialEvent Detection Task @ MediaEval 2011”, which aimsat discovering social events in a large photo collection. Thetask comprises two challenges: (i) identification of soccerevents in the cities of Barcelona and Rome, and (ii) identificationof events taking place in two specific venues. Weadopt an approach that combines spatial and temporal filterswith tag-based location classification models and an ef-ficient photo clustering method. In our best runs, we achieveF-measure and NMI scores of 77.4% and 0.63 respectivelyfor Challenge 1, and 64% and 0.38 for Challenge 2.


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