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Color reduction and conversion using an ordinal lookup table

  • US 5,673,065 A
  • Filed: 12/29/1995
  • Issued: 09/30/1997
  • Est. Priority Date: 12/29/1995
  • Status: Expired due to Term
First Claim
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1. A computer-implemented method for converting a color image composed of color pixels, comprising the steps of:

  • (a) receiving components of a color pixel of the color image;

    (b) truncating most-significant bits from each component of the color pixel;

    (c) combining the most-significant truncated bits to form a color number, the color number representing an index to a nearest-color map;

    (d) generating an index to a color palette using the nearest-color map index, the color palette containing a plurality of colors; and

    (e) accessing one of the plurality of colors to represent the color pixel using the color palette index.

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