The pixel-matching two-difference algorithm and two histogram comparison are used for shot detection, a method of extraction shot key frame based on distance of adjacent frame is presented.
首先使用改进了的像素匹配二次差分法结合双阈值法进行镜头突变和渐变的检测，然后对镜头内的帧间距离进行判断来提取关键帧；
The key frame-based similarity matching measure and retrieval are studied in Chapter 4.
本文第四章主要围绕关键帧图像库进行基于关键帧的相似检索问题的研究。
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