EFFICIENT DEPTH MAP COMPRESSION EXPLOITING SEGMENTED COLOR DATA
Simone Milani, Pietro Zanuttigh, Marco Zamarin, Søren ForchhammerAbstract
3D video representations usually associate to each view a depth map with the corresponding geometric information. Many compression schemes have been proposed for multi-view video and for depth data, but the exploitation of the correlation between the two representations to enhance compression performances is still an open research issue. This paper presents a novel compression scheme that exploits a segmentation of the color data to predict the shape of the different surfaces in the depth map. Then each segment is approximated with a parameterized plane. In case the approximation is sufficiently accurate for the target bitrate, the surface coefficients are compressed and transmitted. Otherwise, the region is coded using a standard H.264/AVC coder. Experimental results show that the proposed scheme permits to outperform the standard H.264/AVC codec on depth data and can be effectively included into multi-view plus depth compression schemes.
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