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Method and system for separating illumination and reflectance using a log color space

  • US 20070242878A1
  • Filed: 04/13/2006
  • Published: 10/18/2007
  • Est. Priority Date: 04/13/2006
  • Status: Active Grant
First Claim
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1. An automated computerized method for generating an illumination invariant, chromaticity representation of an image, comprising the steps of:

  • providing an image comprising an array of pixels, each pixel having N band color values;

    transforming the N bands to log color space values in a log color space;

    generating a bi-illuminant chromaticity plane in the log color space; and

    projecting the log color space values to the chromaticity plane to provide chromaticity representation values corresponding to the pixels of the image.

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