互联网 qkzz.net
全刊杂志网:首页 > 女性 > 文章正文
刊社推荐

一种压缩域中基于镜头的关键帧提取改进算法


□ 陶 丹 陈后金

  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

  中图分类号:TP391文献标志码:A

  文章编号:1001-3695(2009)09-3539-03

  doi:10.3969/j.issn.1001-3695.2009.09.097

  Improved key frame extraction algorithm based on shot for MPEG compressed video

  TAO Dan, CHEN Hou-jin

  (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.

......
很抱歉,暂无全文,若需要阅读全文或喜欢本刊物请联系《计算机应用研究》杂志社购买。
欢迎作者提供全文,请点击编辑
分享:
 

了解更多资讯,请关注“木兰百花园”
分享:
 
精彩图文


关键字
支持中国杂志产业发展,请购买、订阅纸质杂志,欢迎杂志社提供过刊、样刊及电子版。
关于我们 | 网站声明 | 刊社管理 | 网站地图 | 联系方式 | 中图分类法 | RSS 2.0订阅 | IP查询
全刊杂志赏析网 2017