计算机应用 ›› 2012, Vol. 32 ›› Issue (05): 1269-1271.

• 图形图像处理 • 上一篇    下一篇

基于运动矢量的MPEG视频镜头边界检测

王成儒,王微微   

  1. 燕山大学 信息科学与工程学院,河北 秦皇岛 066004
  • 收稿日期:2011-10-17 修回日期:2011-12-10 发布日期:2012-05-01 出版日期:2012-05-01
  • 通讯作者: 王微微
  • 作者简介:王成儒(1949-),男,黑龙江宁安人,教授,主要研究方向:数字图像、视频处理、模式识别; 王微微(1986-),女,河北定州人,硕士研究生,主要研究方向:视频处理、MPEG编解码。

MPEG video shot boundary detection based on motion vectors

WANG Cheng-ru,WANG weiWei-wei   

  1. College of Information science and Engineering, Yanshan University, Qinhuangdao Hebei 066004, China
  • Received:2011-10-17 Revised:2011-12-10 Online:2012-05-01 Published:2012-05-01
  • Contact: WANG weiWei-wei

摘要: 首先提取I帧的DC图进行镜头的粗略检测,然后提取P帧的前向运动补偿矢量,利用扩展矢量中值(EVM)滤波对运动矢量进行滤波预处理,并且进一步提取三个运动特征:运动强度值、运动强度差和运动矢量方向直方图绝对差,最后用模糊逻辑对上述三个特征进行综合,推理得出突变、渐变镜头和非镜头,实现镜头的检测。由于不需要对视频完全解压,直接从MPEG压缩码流中提取信息,所以计算复杂度低,提取速度较快。最后通过实验验证了该方法。

关键词: MPEG, 运动矢量, 运动特征, 镜头边界检测, 模糊推理

Abstract: First,DC map of I frame was extracted for rough detection of the shots.And then the forward motion compensation vector of P frame was extracted, and Extended Vector Median (EVM) filtering was used for the preprocessing of motion vector.Finally the characteristics of three sports features,exercise intensity value, exercise intensity difference and the direction of motion vector histogram, absolute difference were calculated. Fuzzy inference was introduced to synthesize these three characteristics and classified shots to abrupt-change,gradual-change and no-change ones.The MPEG video shot boundary detection method do not need to decompress the video fully,and extracts information directly from MPEG compressed bit stream,so it is of low computation complexity and high extration speed,which is verified by the experimental results.

Key words: MPEG, motion vector, sports feature, shot boundary detection, fuzzy inference

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