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Real-Time Face Tracking in a Digital Image Acquisition Device

  • US 20090263022A1
  • Filed: 06/18/2007
  • Published: 10/22/2009
  • Est. Priority Date: 08/11/2006
  • Status: Active Grant
First Claim
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1. A method of detecting faces in an image stream using a digital image acquisition device comprising:

  • a. receiving an acquired image from said image stream including one or more face regions;

    b. sub-sampling said acquired image at a specified resolution to provide a sub-sampled image;

    c. identifying one or more regions of said acquired image predominantly including skin tones;

    d. calculating a corresponding integral image for at least one of said skin tone regions of said sub-sampled acquired image;

    e. applying face detection to at least a portion of said integral image to provide a set of one or more candidate face regions each having a given size and a respective location; and

    f for a candidate face region associated with a previous image in said stream, enhancing the contrast of the luminance characteristics of the corresponding region of said acquired image.

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