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Représentation en objets vidéo pour un codage progressif et concurrentiel des séquences d'images

Marc Chaumont 1
1 TEMICS - Digital image processing, modeling and communication
IRISA - Institut de Recherche en Informatique et Systèmes Aléatoires, Inria Rennes – Bretagne Atlantique
Abstract : The goal of this thesis is to valid the hypothesis such that the video object coding allows significant improvement thanks to the used of dynamic coding. The dynamic coding is the setting on competition of a set of coders on each video object and the retaining of the best coder for each object. To reach that goal, different points are studied. The first one concerns the study of automatic video object segmentation. We are proposing an object model with the notion of long term tracking. This model represents an object thanks to its motion (by the used of an active mesh) and its texture (by the used of a mosaic). A 3D clustering algorithm is developed based on that model. In a second part, we are improving object coding techniques via the scalability on the video bitstream. To that purpose, we are using a wavelet 3D coding scheme and we are notably introducing a lossy contour coding. Finally the last point studied concerns the dynamic coding. Coders used are H264/AVC, a 3D wavelet coder, a 3D coder and a mosaic coder. The automatic rate distribution allows to obtained better results than those given by each coder took separately, in all offering a cut-out of the bitstream in video objects. Key words : Video object segmentation, long term segmentation, video object model, energetic function, clustering, active mesh, mosaic, video coding, object video coding, decorrelation motion texture form, scalability, spatio-temporal wavelet, 3D wavelet, contour coding, form coding, padding, dynamic coding, competing coding, rate-distortion optimization, rate distribution, antialiasing.
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Submitted on : Tuesday, January 13, 2004 - 2:07:11 PM
Last modification on : Tuesday, June 15, 2021 - 4:13:11 PM
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  • HAL Id : tel-00004146, version 1


Marc Chaumont. Représentation en objets vidéo pour un codage progressif et concurrentiel des séquences d'images. Interface homme-machine [cs.HC]. Université Rennes 1, 2003. Français. ⟨tel-00004146⟩



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