|Title||CERTH @ MediaEval 2011 Social Event Detection Task|
|Publication Type||Conference Paper|
|Year of Publication||2011|
|Authors||Papadopoulos, Symeon, Christos Zigkolis, Yiannis Kompatsiaris, and Athena Vakali|
|Editor||Larson, Martha, Adam Rae, Claire-Helene Demarty, Christoph Kofler, Florian Metze, Raphaël Troncy, Vasileios Mezaris, and Gareth J. F. Jones|
This paper describes the participation of CERTH in the â€śSocialEvent Detection Task @ MediaEval 2011â€ť, 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.
CERTH @ MediaEval 2011 Social Event Detection Task