首页 | 本学科首页   官方微博 | 高级检索  
     

一种压缩域中基于镜头的关键帧提取改进算法*
引用本文:陶丹,陈后金. 一种压缩域中基于镜头的关键帧提取改进算法*[J]. 计算机应用研究, 2009, 26(9): 3539-3541. DOI: 10.3969/j.issn.1001-3695.2009.09.097
作者姓名:陶丹  陈后金
作者单位:北京交通大学,电子信息工程学院,国家电工电子教学基地,北京,100044
基金项目:国家自然科学基金资助项目(60872081); 北京交通大学人才基金资助项目(W07J0260)
摘    要:关键帧提取技术是基于内容视频检索的基础。针对压缩视频序列提出一种基于镜头的关键帧提取改进算法。其核心是根据压缩视频序列的编码特点,只需要对其进行部分解码,利用I帧信息的直流分量信息构造DC缩微图,并结合图像帧不同区域DC信息的重要程度差异进行相似性度量,进而实现关键帧提取。实验证明,该算法较之传统算法,在查全率和检索时间两项指标上均有显著改善,尤其适用于新闻纪录片、电影片等局部运动较为剧烈的视频序列。

关 键 词:关键帧提取; 压缩域; MPEG

Improved key frame extraction algorithm based on shot for MPEG compressed video
TAO Dan,CHEN Hou-jin. Improved key frame extraction algorithm based on shot for MPEG compressed video[J]. Application Research of Computers, 2009, 26(9): 3539-3541. DOI: 10.3969/j.issn.1001-3695.2009.09.097
Authors:TAO Dan  CHEN Hou-jin
Affiliation:(National Teaching Base for Electric & Electronics, School of Electronic Information Engineering, Beijing Jiaotong University, Beijing 100044, China)
Abstract:Key frame extraction is one of fundamental processes in content based on video retrieval (CBVR). This paper proposed an improved key frame extraction algorithm based on shot for MPEG compressed video, which was based on different formulas comparing discrete cosine transform (DCT) direct current (DC) codfficients over the I-frames in MPEG video stream, and for which only minimal decoding was needed. In particular, introduced the importance difference of DC codfficients in one image frame into the process of similarity measure. Experimental results show that our algorithm is superior to other traditonal ones in two criterions: recall and retrieval time, and it is a suitable method for newsreel or film,which have severe local motions in video sequences.
Keywords:key frame extraction   compressed field   MPEG
本文献已被 CNKI 万方数据 等数据库收录!
点击此处可从《计算机应用研究》浏览原始摘要信息
点击此处可从《计算机应用研究》下载全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号