作　　者： ; ; ; ;

机构地区： 浙江大学

出　　处： 《电子学报》 2004年第5期848-850,共3页

摘　　要： 在单通道视频目标分割算法的基础上 ,首先提出一种多视点视频编码中的视频目标提取方案 .然后提出一种基于多级块匹配视差估计算法 .应用Moravec算子对视差矢量图进行检测 ,提取特征视差矢量并对其进行精确度检验 .若特征视差矢量不够精确 ,则其所在块将重新进行小范围的块匹配 .若块匹配误差仍太大则将其分裂为四个子块重新匹配 .与传统块匹配算法相比 ,新方法能获得较为精确和平滑的视差场 ,提高重建后的图像质量 . Based on algorithm for extracting video objects in one view-channel, a new scheme of extracting video objects in multi-view coding is proposed. A disparity estimation algorithm based on multi-level block matching is proposed. Moravec operator is used to find out characteristic disparity vectors in disparity images for precision confirmation. If a characteristic disparity vector is not precise enough, the block it belongs to will be matched again around the area indicated by the vector. If a block is still not matched precisely, it is split into four equal sub-blocks for block matching. Compared with traditional block-matching based algorithm, more precise and smooth disparity field can be acquired with the proposed algorithm, so that the quality of reconstructed image can be greatly improved.

关 键 词： 多视点视频编码 视频目标提取 视差估计

领　　域： [自动化与计算机技术] [自动化与计算机技术]