%0 Conference Paper
%B MediaEval
%D 2011
%T CERTH @ MediaEval 2011 Social Event Detection Task
%A Symeon Papadopoulos
%A Christos Zigkolis
%A Yiannis Kompatsiaris
%A Athena Vakali
%E Larson, Martha
%E Rae, Adam
%E Demarty, Claire-Helene
%E Kofler, Christoph
%E Metze, Florian
%E Troncy, Raphaël
%E Mezaris, Vasileios
%E Jones, Gareth J. F.
%X <p>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.</p>
%B MediaEval
%S CEUR Workshop Proceedings
%I CEUR-WS.org
%V 807
%G eng