×

Real-time face tracking in a digital image acquisition device

  • US 8,509,498 B2
  • Filed: 09/26/2011
  • Issued: 08/13/2013
  • Est. Priority Date: 08/11/2006
  • Status: Active Grant
First Claim
Patent Images

1. A method of detecting faces in an image stream, comprising:

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

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

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

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

    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

    responsive to failing to detect at least one face region for said image, enhancing the contrast of the luminance characteristics for at least a region corresponding to one of said skin tone regions in a subsequently acquired image.

View all claims
  • 5 Assignments
Timeline View
Assignment View
    ×
    ×