In this work, we propose a system for shot comparison directly working on the MPEG-1 stream in the compressed domain, extracting both color, texture and motion features considering all frames with a reasonable computational cost, and results comparable to those obtained on uncompressed keyframes. In particular a summary descriptor for each Group Of Pictures (GOP) is computed and employed for shot characterization and comparison. The Mallows distance allows to match different length clips in a unified framework.
Compressed Domain Features Extraction for Shot Characterization / Grana, Costantino; Vezzani, Roberto; Borghesani, Daniele; Cucchiara, Rita. - ELETTRONICO. - (2007), pp. 71-80. (Intervento presentato al convegno 1st International Workshop on Knowledge Acquisition from Multimedia Content tenutosi a Genova, Italy nel Dec 5).