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VISUAL TRACKING FRAMEWORK

  • US 20140219499A1
  • Filed: 11/04/2013
  • Published: 08/07/2014
  • Est. Priority Date: 02/18/2009
  • Status: Active Grant
First Claim
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1. A method of tracking a region in a sequence of video images, the method comprising:

  • identifying a frame of a video sequence on which to perform region tracking for a region defined using markers in another frame of the video sequence, wherein a model for the region has been generated using the video sequence, the model being based on user-selected positions for the markers in multiple reference frames of the video sequence, and wherein the model includes an average image and multiple component images, the average image representing an average appearance of the region in the reference frames, and each of the component images representing differences between the reference frames and the average image;

    tracking the region in the frame of the video sequence using a multi-pass search that adapts the model to the frame, wherein the multi-pass search associates the model with a first location in the frame and performs a plurality of optimization procedures in an iterative manner seeking to improve a match between a model transformation and the frame to generate a revised model associated with a second location in the frame; and

    recording the revised model transformation and the second location as an outcome of tracking the region in the frame.

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