SocialSensor: Finding Diverse Images at MediaEval 2014

E. Spyromitros-Xioufis, S. Papadopoulos, I. Kompatsiaris, I. Vlahavas, “SocialSensor: Finding Diverse Images at MediaEval 2014”, CEUR Workshop Proceedings, CEUR-WS.org, Vol-1263, pp. 2, Barcelona, Catalunya, Spain, 2014.

diversification, image retrieval, relevance detector, greedy optimization, visual features.

This paper describes the participation of the SosialSensor team in the Retrieving Diverse Social Images Task of MediaEval 2014. All our entries are produced by a different instantiation (set of features, parameter configuration) of the same diversification algorithm that optimizes a joint relevance-diversity criterion. All our runs are automated and use only resources given by the task organizers. Our best results in terms of the social ranking metric (F1@20 ~ 0.59) came by the runs that combine visual and textual information, followed by the visual-only run.