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1·Key frame reflects only the contents of a scene.

闭键帧仅仅反映了一个镜头的外容。

2·Firstly, we do video segmentation and key frame extraction.

首先，进行视频分割和提取关键帧。

3·Finally, we do some discussion in key frame extraction and shot cluster.

最后，对关键帧提取和镜头聚类等方面做了一定的探讨。

4·The study of method of key frame extraction is focused on in this thesis.

关键帧提取方法的研究是本文的核心组成部分。

5·Key frame extraction is a fundamental processes for content-base video retrieval and video analysis.

关键帧提取技术是基于内容检索和视频分析的基础。

6·Then key frame extraction will be carried out after shot segmentation to describe main content of shot.

视频分割为镜头后，下一步的工作就是进行关键帧提取，用以描述镜头的主要内容。

7·The study and design of a key frame extraction system based on shot attribute is described in this paper.

研究并设计了一种基于镜头属性的关键帧提取系统。

8·Key frame extraction is one of fundamental processes in video analysis and content-based video retrieval.

关键帧提取技术是视频分析和基于内容的视频检索的基础。

9·During key frame extraction, the concept of image entropy is used after shot being segmented into sub-shots.

在关键帧提取阶段，将镜头分割为子镜头后，引入图像熵的概念提取关键帧。

10·The video scene cutting and the key frame abstraction are the two key technologies in the video abstraction.

视频场景切分和关键帧提取是视频摘要技术的两个关键内容。