A key frame extraction system and method for extracting key frames from a video based on motion analysis of frames within the video. Key frames are highlight frames that are effective in summarizing a video sequence. This allows a user to quickly find a desired spot in a video is long and contains differing...http://www.google.com.tw/patents/US7359440?utm_source=gb-gplus-share專利 US7359440 - Method and system for extracting key frames from video using a triangle model of motion based on perceived motion energy
