IEEE Trans Image Process - Efficient multiview depth coding optimization based on allowable depth distortion in view synthesis.

Tópicos

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Resumo

Depth video is used as the geometrical information of 3D world scenes in 3D view synthesis. Due to the mismatch between the number of depth levels and disparity levels in the view synthesis, the relationship between depth distortion and rendering position error can be modeled as a many-to-one mapping function, in which different depth distortion values might be projected to the same geometrical distortion in the synthesized virtual view image. Based on this property, we present an allowable depth distortion (ADD) model for 3D depth map coding. Then, an ADD-based rate-distortion model is proposed for mode decision and motion/disparity estimation modules aiming at minimizing view synthesis distortion at a given bit rate constraint. In addition, an ADD-based depth bit reduction algorithm is proposed to further reduce the depth bit rate while maintaining the qualities of the synthesized images. Experimental results in intra depth coding show that the proposed overall algorithm achieves Bjontegaard delta peak signal-to-noise ratio gains of 1.58 and 2.68 dB on average for half and integer-pixel rendering precisions, respectively. In addition, the proposed algorithms are also highly efficient for inter depth coding when evaluated with different metrics.

Resumo Limpo

depth video use geometr inform d world scene d view synthesi due mismatch number depth level dispar level view synthesi relationship depth distort render posit error can model manytoon map function differ depth distort valu might project geometr distort synthes virtual view imag base properti present allow depth distort add model d depth map code addbas ratedistort model propos mode decis motiondispar estim modul aim minim view synthesi distort given bit rate constraint addit addbas depth bit reduct algorithm propos reduc depth bit rate maintain qualiti synthes imag experiment result intra depth code show propos overal algorithm achiev bjontegaard delta peak signaltonois ratio gain db averag half integerpixel render precis respect addit propos algorithm also high effici inter depth code evalu differ metric

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