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Group average filter algorithm for digital image processing

  • US 7,245,780 B2
  • Filed: 04/24/2006
  • Issued: 07/17/2007
  • Est. Priority Date: 08/11/2003
  • Status: Expired due to Fees
First Claim
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1. A method for processing digital images, comprising:

  • converting an image to a two-dimensional array, wherein the two-dimensional array comprises one or more rows of pixels, and wherein each row of pixels comprises one or more row sections;

    computing a mean intensity of a row of pixels;

    computing a mean intensity of a row section of the row of pixels;

    if the mean intensity of the row section is greater than the mean intensity of the row of pixels, processing the pixels in the row section according to a first method;

    if the mean intensity of the row section is less than the mean intensity of the row of pixels, processing the pixels in the row section according to a second method; and

    wherein each of the first method and the second method comprises comparing the mean intensity of the row of pixels to a value computed as a function of a non-zero percentage threshold and an intensity of a pixel in the row section.

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