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The optimization of occlusion-inducing depth pixels in depth map coding hasreceived little attention in the literature, since their associated texturepixels are occluded in the synthesized view and their effect on the synthesizedview is considered negligible. However, the occlusion-inducing depth pixelsstill need to consume the bits to be transmitted, and will induce geometrydistortion that inherently exists in the synthesized view. In this paper, wepropose an efficient depth map coding scheme specifically for theocclusion-inducing depth pixels by using allowable depth distortions. Firstly,we formulate a problem of minimizing the overall geometry distortion in theocclusion subject to the bit rate constraint, for which the depth distortion isproperly adjusted within the set of allowable depth distortions that introducethe same disparity error as the initial depth distortion. Then, we propose adynamic programming solution to find the optimal depth distortion vector forthe occlusion. The proposed algorithm can improve the coding efficiency withoutalteration of the occlusion order. Simulation results confirm the performanceimprovement compared to other existing algorithms.

Optimization of Occlusion-Inducing Depth Pixels in 3-D Video Coding