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Method and apparatus for representing and searching for color images

  • US 6,801,657 B1
  • Filed: 04/25/2000
  • Issued: 10/05/2004
  • Est. Priority Date: 04/29/1999
  • Status: Expired due to Term
First Claim
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1. A method of representing a color image, comprising:

  • selecting two or more colors as representative colors for the image or a region of said image;

    calculating for each representative color a parameter related to the color variance in relation to the respective representative color for said image or the image region having two or more representative colors;

    calculating for each representative color a weight parameter representing the relative significance of the representative color in the image or image region, based on a ratio of the number of pixels corresponding to the representative color relative to the number of pixels in the image or image region; and

    using said parameters to derive a descriptor for said image or image region, said descriptor including the parameter related to the corresponding color variance and the weight parameters.

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