摘要
视差估计与补偿是立体图像编码的关键问题,本文提出了一种基于交叠块匹配的视差估计与补偿算法。基于交叠块匹配的分层视差估计,将块分割和平滑约束融入视差估计,可得到光滑准确的视差矢量场。自适应交叠块视差补偿可克服通常的交叠块视差补偿的过平滑效应,在相同的编码比特率下,与块补偿及OBDC相比,AOBDC可获得2.4 dB及0.9 dB的峰值信噪比增益。
Disparity estimation and compensation are vital tasks in stereo image coding. An algorithm for disparity estimation and compensation based on overlapped block matching is proposed in this paper. Combining the block segmentation and smoothness constraints into disparity estimation, the hierarchical disparity estimation based on overlapped block matching can obtain a smooth and consistent DV field. The adaptive overlapped block disparity estimation can prevent the oversmoothing effects occurring in conventional OBDC. The AOBDC can achieve a PSNR gain of 2.4 dB and 0.9 dB as compared to BDC and OBDC respectively.
出处
《通信学报》
EI
CSCD
北大核心
2003年第3期1-7,共7页
Journal on Communications
基金
国家自然基金资助项目(69972027
60202015)
关键词
视差估计/补偿
交叠块匹配
块分割
平滑约束
自适应窗
diaparity estimation/compensation
overlapped block matching
block segmentation
smoothness constraints
adaptive window
