压缩视频流中主要运动的定性分析  

Qualitative Analysis of Dominant Motion for Compressed Video Stream

作　　者：薛向阳[1,2] 肖友能[1,2] 丁长明[1,2] 

机构地区：[1]复旦大学计算机科学与工程系,上海200433 [2]复旦大学智能信息处理开放实验室,上海200433

出　　处：《计算机学报》2002年第12期1428-1433,共6页Chinese Journal of Computers

基　　金：国家自然科学基金 ( 6 0 0 0 30 17);国家"八六三"高技术研究发展计划( 2 0 0 1AA114 12 0 ;2 0 0 2 AA10 30 6 5 );上海市科委资助项目 ( 0 1QD14 0 13;0 15 115 0 44)等资助

摘　　要：随着视频数据量的急剧增加 ,如何为海量视频数据建立高效索引并提供查询和检索能力成为目前信息检索领域重要的研究课题 .许多研究表明 ,通过对视频中主要运动的定性分析 ,有助于实现视频内容的索引和检索 .该文根据运动矢量的分布特性、运动矢量之间的相对关系特性等 ,提出了一种压缩视频流中主要运动的定性分析算法 .实验结果表明该算法具有速度快、精度高、鲁棒性好等特征 ,非常适合于视频信息检索方面的应用 .Content-based indexing of video has received great attention by the research community. In general, by analyzing color, shape, texture and motion features in video data, we can get useful meta-data about video content to realize video retrieval. A new algorithm for qualitative analysis of dominant motion in video shots is proposed in this paper. It makes use of the directional distribution of motion vectors and the relationship between any two motion vectors in MPEG-1/2 stream. It is possible to obtain reliable estimation of dominant motion by directly processing motion vectors easily obtained from the compressed stream. Working directly with the compressed video greatly reduces the processing time and enhances storage efficiency. As an illustration of this idea, the algorithm is tested on the Open Video Test Data Collection. Experimental results show that the proposed algorithm is much fast, robust and of high accuracy.

关 键 词：压缩 视频流 定性分析 运动矢量 视频检索 运动分析 计算机网络 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]