Evènement pour le groupe Séminaire du LaBRI

Date 2008-04-17  14:00-15:00
TitreSéminaire LaBRI, A few topics of investigation for video obtained from active cameras 
RésuméPan tilt zoom cameras are of frequent use in sport video and are increasingly popular in surveillance. They permit to actively track the targets with much wider coverage than fixed cameras, focus on target's parts such as faces or objects, and, in their IP-based configuration, have low cost network infrastruc ture. However the use of these devices introduces new complexities and requirements in several classical problems of video analysis. In particular, SIFT-based shape matching appears appropriate in that it exhibits invariance under rotation, translation and scale change. But in practical applications its effective application depends on how much the thresholds used for matching adapt to the active camera observations. In networked surveillance configurations with IP active cameras, due to the network lag, it is difficult to perform tracking from the analysis of the frames of the active camera or acquire high resolution images without loosing camera calibration. Using active cameras in surveillance applications permits to focus on target faces and therefore, at least in principle, more effective recognition. Due to the increasing availability of three-dimensional face models, this drives the interest in face recognition based on 3D face models so as to improve the eff ectiveness of face recognition systems. We discuss these issues and the solutions that have been developed at Media Integration and Communication Center of the University of Florence.  
LieuAmphi LaBRI 
OrateurAlberto Del Bimbo 

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