eo from a single camera running from camera on to camera off. Using one keyframe per shot means that representing a one-hour video usually requires hundreds of keyframes. In contrast, our approach for video indexing and summarization selects fewer keyframes that represent the entire video and index the interesting parts. The user can select the number of keyframes or the application can select the optimal number of keyframes based on display size, but a one-hour video typically will have between 10 and 40 keyframes. We use several techniques to present the automatically selected keyframes. A video directory listing shows one keyframe for each video and provides a slider that lets the user change the keyframes dynamically. The visual summary of a single video presents images in a compact, visually pleasing display. To deal with the large number of keyframes that represent clips in a video editing system, we group keyframes into piles based on their visual similarity. In all three inte
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