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System and method for dynamically enhanced color space

  • US 7,127,123 B2
  • Filed: 06/24/2002
  • Issued: 10/24/2006
  • Est. Priority Date: 12/21/2001
  • Status: Active Grant
First Claim
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1. A method for enhancing contrast in a plurality of images in a video sequence by mapping an input intensity value to an output intensity value in accordance with a mapping function, the method comprising the steps of:

  • (a) determining a mean intensity value of the image;

    (b) calculating the mapping function including left, right, middle, and principal range, the principal range being contained within the middle range;

    (c) applying the mapping function to the input intensity value for determining said output intensity responsive to determining the modality;

    (d) determining that the image is likely unimodal if a percentage of image pixels that lie in the principal range is above a first predefined threshold; and

    (e) determining that the image is likely bimodal if the percentage of image pixels that lie in the principal range is below a second predefined threshold;

    (f) dynamically generating the mapping function for each image in the video sequence.

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