研究人员通常将镜头转换分为突变和渐变，并根据各种转换的特点采用不同的检测算法。

Researchers usually classify scene changes as abrupt or gradual and develop respective algorithms to detect them.

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镜头的转换方式分为切变和渐变，本文对镜头的切变和渐变中的淡入淡出检测分别做了研究。

The methods of shot change include abrupt change and gradual change, this thesis researches shot abrupt change detection and fade-in and fade-out of gradual change detection.

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镜头的转换方式分为切变和渐变，本文对镜头的切变和渐变中的淡入淡出检测分别做了研究。

The methods of shot change include abrupt change and gradual change, this thesis researches shot abrupt change detection and fade-in and fade-out of gradual change detection.

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