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Method and apparatus for face tracking utilizing integral gradient projections

  • US 8,873,811 B2
  • Filed: 06/12/2012
  • Issued: 10/28/2014
  • Est. Priority Date: 06/30/2011
  • Status: Active Grant
First Claim
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1. A method comprising:

  • determining at least one transfer function relating integral projection curves of a face region in a first frame, wherein the face region has a predefined position and a predetermined size, and of a first window in a second frame, wherein the first window is co-located in size and position with the face region;

    determining a scaling factor based upon the at least one transfer function;

    determining integral gradient projections for the face region in the first frame and for a second window in the second frame with the second window having a size that is based upon a size of the first window modified by the scaling factor;

    determining a distance between the integral gradient projections of the face region in the first frame and of the second window in the second frame; and

    determining whether the scaling factor is verified based on a relationship between the distance and a predefined threshold.

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