基于MPEG-2的立体视频编码中的视差估计快速算法

Fast Disparity Estimation Algorithms for Stereo Video Coding Based on MPEG-2

分析了立体摄像系统视差分布的约束和视差矢量的相关性,包括帧内视差矢量的空域相关性和帧间视差矢量的时域相关性.对于空域相关性,根据块特征变量(TL)将图像分成三类区域,分别分析每个区域内部的视差矢量相关性.不同区域内部视差矢量的相关性强弱不同.基于视差分布约束和视差矢量的相关性,给出了视差估计快速算法.实验结果表明,提出的快速算法能有效降低视差估计的计算复杂度.

The constraints on disparity distribution and correlations among disparity vectors were first analyzed, including the temporal correlation among intra-frame disparity vectors and spatial correlation among inter-frame disparity vectors. For the temporal correlation, each frame was segmented into three kinds of regions according to block-featuring variant TL , and correlation in each region was analyzed. In different regions the correlation was different. Then, fast algorithms for disparity estimation were presented. Experimental results showed that the proposed fast algorithms can efficiently reduce the computational complexity of disparity estimation.