G.C. Lee and M.-N. Tsai (Taiwan)
Slide-change detection, key-frame detection, image manipulation and compression
Key-frame extraction is an important pre-process step before video indexing and retrieval. For lecture videos, key-frames are defined to be those involving slide-changing frames. This paper proposes an efficient algorithm for automatic slide-change detection of MPEG lectures videos. The proposed algorithm is based on analyzing the regional differences of the dc values of the Y-channel of I-frames of the MPEG compressed video. Experimental results show that the proposed algorithm is fast and effective in detecting slide-changing frames while suppressing those involving intensity changes due to non-slide-changing activities.
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