| 摘要 |
A system and process for generating a new video sequence from frames taken from an input video clip. Generally, this involves computing a similarity value between each of the frames of the input video clip and each of the other frames. For each frame, the similarity values associated therewith are analyzed to identify potentially acceptable transitions between it and the remaining frames. A transition is considered acceptable if it would appear smooth to a person viewing a video containing the frames, or at least if the transition is one of the best available. A new video sequence is then synthesized using the identified transitions to specify an order in which the frames associated with these transitions are to be played. Finally, the new video sequence is rendered by playing the frames of the input video clip in the order specified in the synthesizing procedure. This rendering procedure can include a smoothing action in which those transitions that were deemed acceptable, but would not appear smooth to a viewer, are smoothed to lessen the discontinuity. This general process can be used to generate continuous video sequences or fixed-length, loopable sequences. In addition, the process can be extended to process areas of independent motion in the input video clip separately and then recombine them during the rendering procedure, separate video texture elements from their backgrounds so that they can be used as video sprites.
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