LOW-COMPLEXITY DEPTH MAP ENCODER WITH QUAD-TREE PARTITIONED COMPRESSED SENSING

摘要

A variable block size compressed sensing (CS) method for high efficiency depth map coding. Quad-tree decomposition is performed on a depth image to differentiate irregular uniform and edge areas prior to CS acquisition. To exploit temporal correlation and enhance coding efficiency, the quad-tree based CS acquisition is further extended to inter-frame encoding, where block partitioning is performed independently on the I frame and each of the subsequent residual frames. At the decoder, pixel domain total-variation minimization is performed for high quality depth map reconstruction.

主权项

1. A method of compressing and reconstructing depth image sequences from multi-view video sensors, comprising:
recursively partitioning and classifying depth images of at least two corresponding multi-view videos into a plurality of smooth blocks of varying size and a plurality of edge blocks; encoding each smooth block as a function of block pixel intensity; encoding each edge block using compressed sensing; reconstructing the smooth blocks and the edge blocks into reconstructed macro blocks; and forming depth image sequences from the reconstructed macro blocks for the at least two corresponding multi-view videos.