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Automatic white balance method and apparatus

  • US 20050286097A1
  • Filed: 01/25/2005
  • Published: 12/29/2005
  • Est. Priority Date: 06/25/2004
  • Status: Active Grant
First Claim
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1. A method of performing Automatic White Balance (AWB), the method comprising:

  • receiving a captured image;

    filtering the captured image to select gray pixels;

    determining a distance in a coordinate grid from each of a plurality of reference illuminant points to a location in the coordinate grid determined at least in part on the gray pixels, determining an illuminant based in part on the distances; and

    applying a white balance gain to the captured image based in part on the illuminant.

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