01-11-2012 дата публикации
Номер: US20120275521A1
Принадлежит:
Technologies are generally described herein for extracting a representative motion flow from a video. Technologies are also generally described herein for retrieving a video utilizing the representative motion flow. The representative motion flow may be extracted utilizing a sliding window approach to generate interesting motion flows. The representative motion flow may be generated based on the interesting motion flows. 1. A computer-implemented method for extracting a representative motion flow from video , the method comprising:receiving, through a computer having a processor and a memory, a video file comprising a plurality of frames;dividing, through the computer, the video file into a plurality of sliding windows, each of the plurality of sliding windows comprising at least two of the plurality of frames; generating, through the computer, motion flows,', 'clustering, through the computer, the motion flows having similar characteristics into a first plurality of clusters,', 'extracting, through the computer, first meaningful clusters from the first plurality of clusters, and', 'matching, through the computer, the motion flows in the first meaningful clusters of a current sliding window of the plurality of sliding windows with the motion flows in the first meaningful clusters of previous sliding windows of the plurality of sliding windows to generate interesting motion flows; and, 'for each of the plurality of sliding windows,'}determining, through the computer, representative motion flows based on the interesting motion flows.2. The computer-implemented method of further comprising:extracting, through the computer, global motion vectors from the plurality of frames;detecting, through the computer, corner points in the plurality of frames; andextracting, through the computer, local motion vectors based on the global motion vectors.3. The computer-implemented method of claim 2 , wherein generating motion flows comprises generating claim 2 , through the computer ...
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