ICTEAM > ELEN > ISPGroup > ISPS > Calendar > ABS050613


Title: "Training with corrupted labels to reinforce a probably correct team-sport player detector"

Speaker: Pascaline Parisot (ICTEAM/ELEN, UCL)

Location: "Shannon" Seminar Room (a105) Place du Levant 3, Maxwell Building, 1st floor

Date / Time (duration): June 5th, 14h00 (~ 45')


While the analysis of foreground silhouettes has become a key component of modern approach to multi-view people detection, it remains subject to errors when dealing with a single viewpoint. Besides, several works have demonstrated the benefit of exploiting classifiers to detect objects or people in images, based on local texture statistics. We train a classifier to differentiate false and true positives among the detections computed based on a foreground mask analysis. This is done in a sport analysis context where people deformations are important, which makes it important to adapt the classifier to the case at hand, so as to take the teamsport color and the background appearance into account. To circumvent the manual annotation burden incurred by the repetition of the training for each event, we propose to train the classifier based on the foreground detector decisions. Hence, since the detector is not perfect, we face a training set whose labels might be corrupted. We investigate a set of classifier design strategies, and demonstrate the effectiveness of the approach to reliably detect sport players with a single view.


Last updated September 25, 2013, at 09:02 AM