一种有效的镜头探测方法

An Effective Shot Detection Method

镜头是视频分析和检索的基本单元,根据两个相续镜头处视频内容的变化情况,可以把镜头边界分为突变和渐变两种。镜头探测的方法很多,但大多都是针对某一类镜头准确性很高。文中,介绍了一种有效的镜头探测方法,此方法综合利用双直方图比较法和MPEG视频流中B帧宏块的信息来探测镜头边界,对不同类型的镜头,都取得了很高的准确性。通过对十几段不同类型MPEG_I视频节目进行试验,效果相当理想。

Shot is the basic units in video analyses and index.According to the change of two series shots,it can define shot boundary as abrupt change and gradual change.This paper introduces an effective shot detection method,which detects shots through double-histogram comparing and the information of macroblock in B frame of mpeg video stream.Because double-histogram comparing method is more effective for gradual change,while using the information of macroblock in B frame is more suitable for abrupt change,It integrates these two methods and proposes a new method.Experiments on ten MPEG_I video programs prove that the method is effective for both abrupt and gradual change.