search engine uses computer-based facial recognition and other tools to analyze videos frame by frame. see a list of videos and thumbnail previews of representative scenes.
H. Sack, и J. Waitelonis. in Proc. of 5. e-Learning Fachtagung Informatik, DeLFI 2007, том P-111 из Lecture Notes in Informatics (LNI), Bonn, Köllen, (2007)