CEA LIST's Participation at the MediaEval 2014 Retrieving Diverse Social Images Task

International audienceThe Mediaeval 2014 Retrieving Diverse Social Image Task aims to tackle the challenge of improving result diversity while keeping a high precision in a social image retrieval task. We base our approach on the retrieval performance of recently introduced visual descriptors coupled with a mixt diversification method that explores the use of social cues together with a classic clustering setting. As a novelty, this year's task introduced user credibility features. We also de- scribe how to use credibility in the diversification process and how to improve individual features by the means of a regression model