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Processing digital video using trajectory extraction and spatiotemporal decomposition

  • US 8,050,454 B2
  • Filed: 12/29/2006
  • Issued: 11/01/2011
  • Est. Priority Date: 12/29/2006
  • Status: Expired due to Fees
First Claim
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1. A method comprising:

  • extracting interest point data from data representing a plurality of video frames, wherein the interest point data is extracted from each of the video frames independent of the other video frames;

    subsequent to the extracting of the interest point data, linking at least some of the interest point data to generate corresponding trajectory information by;

    linking first interest point data from a first video frame to second interest point data from a second video frame that is separated from the first video frame by a quantity of intermediate video frames, andlinking third interest point data from the second video frame to fourth interest point data from a third video frame that is separated from the second video frame by the same quantity of intermediate video frames;

    clustering the trajectory information to form clustered trajectory information;

    extracting, via a processor, a representative feature index from the clustered trajectory information; and

    indexing the video frames in a database to be searchable based on the representative feature index.

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