Thirdly this paper proposes a motion-based algorithm for represent frame extraction, which can extract represent frames dynamically according to the requirement of the user. It will extract more frames if there is much motion in a shot, and vice versa.
提出了一种基于运动和用户需求的代表帧抽取方法，可以根据用户的要求动态地抽取一定数量的代表帧，对运动较少的镜头抽取少量的代表帧，而对运动较大的镜头则抽取较多的代表帧，而且充分考虑到了代表帧在镜头中的分布情况。
参考来源 - 视频特征提取和视频镜头分析·2,447,543篇论文数据，部分数据来源于NoteExpress
You’d see it in commercials, they’d demo it in stores, and it seemed to represent a sort of shift where the TV image was no longer strictly confined to the solid frame of the box it came in.
你会在许多商业活动中看到它，人们会在商店里演示它，似乎画中画技术代表着一种转变，即电视的图像不再被死死地限制在一个电视固定的框里播放。
Now, define a frame class, which will represent the main window of your application.
现在开始定义框架类，它代表应用程序中的主窗口。
In Figure 7, we've added a field in addition to the time frame a user accesses the file to represent in which mode the file access is provided - whether the user is accessing for write or for read.
图7中，我们在时间框架中额外添加了一个用户访问文件来表示所提供的文件访问模式—用户以读模式还是以写模式访问。
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