Coherent disparity and motion compensation in 3DTV image sequence coding schemes

The authors present motion estimation methods applied to 3DTV image sequence coding schemes using motion compensation predictions. For 3DTV image sequence analysis and transmission, it is possible to jointly estimate in a coherent fashion two apparent motion vector fields subject to stereoscopic constraints. Locally, initial image data are grouped within two views (the left and right ones) at two successive time samples and spatiotemporal coherence has to be used to enhance motion vector field estimation. Several levels of coherence have been tested. The most promising approach, which consists in a joined stereoscopic motion estimation subject to motion and disparity constraints, is emphasized. Finally, results are shown on real stereoscopic 3D TV image sequences