Wang Ping,Tan Zheng,Cai Cheng
(School of Electronics and Information Engineering,Xi'an Jiaotong University,Xi'an ¡¡710049,China)
Abstract:An integrated motion-parameter-curve algorithm is presented for content-based video analysis, which implements shot segmentation based on camera motion parameter estimation with motion information of compressed domain. The algorithm facilitates calculating camera motion parameters between frames, and judging camera motion trends within consecutive frames; realizes automatic temporal segmentation and recognizes close-shots in video streams-simultaneously. The advantage of this algorithm lies in the integrated consideration on camera motion recognition and shot change detection, adopting the same technique and the uniform threshold sets for various video types robustly. Ten paragraphs of standard video sequences of 284 minute long are tested, and the recall rate reaches from 92% to 100%, the precision rate is higher than 86%£not counting cartoons and sports snatches.
Keywords:shot segmentation of video streams;camera motion recognition;compressed domain