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Method and system for image compression using image symmetry

  • US 7,742,649 B2
  • Filed: 06/21/2007
  • Issued: 06/22/2010
  • Est. Priority Date: 12/17/2002
  • Status: Expired due to Term
First Claim
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1. A computer-implemented method for reducing an image representing a substantially symmetric subject, comprising the steps of:

  • dividing the image into a first part and a second part, the second part being substantially symmetric to the first part;

    determining pairs of symmetrically corresponding pixels, a member of the pair in the first part having an X pixel value and a member of the pair in the second part having a Y pixel value;

    computing a weighted average value A of the pixel values of each one of the pairs;

    computing a weighted variance value B of the pixel values of each one of the pairs;

    representing each of the pairs with the weighted average and the weighted variance values;

    generating reduced image data including at least a plurality of A values and corresponding B values the pairs;

    reconstituting the image by computing the X pixel value and the Y pixel value from the weighted average value A and the weighted variance value B; and

    compressing the reduced image data with an image compression algorithm, wherein the reconstituting step further includes the substep of removing visual artifacts from the reconstituted image, wherein the visual artifacts comprise a seam line between the first part and the second part, wherein the dividing, determining, computing, representing and generating steps are executed by a microprocessor.

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