Model-based Quality Control for the Compression of 3D Mesh Sequences with Fixed Connectivity
Résumé
We introduce in this paper a compression process to encode the geometry of 3D mesh sequences (with a fixed connectivity) using a temporal lifting scheme. The proposed approach is based on an asymptotic quality allocation method, using statistical models for the probability densities of the temporal wavelet coefficients. Then, a scalar quantization is applied on these wavelet coefficients and an entropy coder encodes the quantized subbands. The resulting compression scheme shows that the proposed method allows to control the quality of the decoded sequence along the time according to its motion. We show that the best coding performances are obtained when a scan-based quality allocation is used with small GOP size. Furthermore, the proposed coder provides better or similar performances than some state of the art coders.