Nevenka Dimitrova Thomas McGee Herman Elenbaas Video Keyframe Extraction and Filtering: A Keyframe is not a Keyframe to Everyone. 113-120 CIKM1997/P113.pdf 1997 conf/cikm/97 CIKM http://doi.acm.org/10.1145/266714.266876 db/conf/cikm/cikm97.html#DimitrovaME97