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Method of compressing an image

  • US 6,738,520 B1
  • Filed: 06/19/2000
  • Issued: 05/18/2004
  • Est. Priority Date: 06/19/2000
  • Status: Expired due to Fees
First Claim
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1. A method of compressing an image, the image being having gray scale values, comprising:

  • (a) dividing the image into quadrants;

    (b) measuring the gray scale variation in each quadrant so that each quadrant is either a low variation quadrant or a high variation quadrant;

    (c) replacing any low variation quadrants with an estimate for the particular quadrant;

    (d) determining whether any high variation quadrants can be estimated using a contractive map of the image; and

    if not, applying (a), (b), (c), and (d) to the particular one or more high variation quadrants that cannot be estimated by a contractive map of the image.

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