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GAUSSIAN MIXTURE MODEL BASED ILLUMINATION NORMALIZATION FOR GLOBAL ENHANCEMENT

  • US 20110123133A1
  • Filed: 06/30/2008
  • Published: 05/26/2011
  • Est. Priority Date: 06/30/2008
  • Status: Active Grant
First Claim
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1. A method for enhancing an image from an initial image comprising the steps of:

  • (a) computing a first luminance level frequency distribution corresponding to a plurality of pixels constructing said initial image;

    (b) representing said first luminance level frequency distribution as a resultant of Gaussian model mixtures to assess relative utilization of overall luminance level across said initial image;

    (c) computing a desired luminance level frequency distribution as a function of the relative utilization;

    (d) computing a transfer function to adjust the first luminance level frequency distribution to an enhanced luminance level as a function of desired level frequency distribution estimation; and

    (e) applying said transfer function globally to said initial image to provide an enhanced image.

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