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Tracking semantic objects in vector image sequences

  • US 6,711,278 B1
  • Filed: 09/10/1998
  • Issued: 03/23/2004
  • Est. Priority Date: 09/10/1998
  • Status: Expired due to Term
First Claim
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1. A method for tracking video objects in video frames, the method comprising:

  • performing spatial segmentation on a current video frame to identify plural regions of pixels with homogenous intensity values;

    performing motion estimation between each of the plural regions in the current video frame and a previous video frame in which a boundary of a video object was previously computed;

    using the motion estimation for each of the plural regions to warp pixel locations in the region to locations in the previous video frame;

    determining whether the warped pixel locations are within the previously computed boundary of the video object in the previous video frame to identify a set of the plural regions that are likely to be part of the video object in the current video frame; and

    forming a boundary of the video object in the current video frame as a combination of each of the plural regions in the current video frame that are in the set.

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