At least one visual significance metric is determined (12) for at least some frames belonging to an original series of frames (11). Key frames are identified (13) as a function, at least in part, of the visual significance metric. Cumulative visual significance values are then determined (14) for at...http://www.google.de/patents/US6963378?utm_source=gb-gplus-sharePatent US6963378 - Method and apparatus for reduction of visual content
