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Image forming apparatus and color converting method thereof

  • US 8,363,267 B2
  • Filed: 01/11/2008
  • Issued: 01/29/2013
  • Est. Priority Date: 06/01/2007
  • Status: Expired due to Fees
First Claim
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1. An image forming apparatus, comprising:

  • a scanning unit to scan an image and to output corresponding digital color coordinates;

    a determining unit to compute a matrix operation using a reference matrix computed from a standard color gamut and the digital color coordinates, and to determine a local color gamut including the digital color coordinates, from the standard color gamut including a plurality of local color gamuts using the result of the matrix operation;

    a matrix selecting unit to select a color conversion matrix that corresponds to the local color gamut, from color conversion matrices corresponding to the plurality of local color gamuts;

    a computing unit to compute LAB color coordinates based on the selected color conversion matrix and the digital color coordinates;

    a storage unit to pre-store the reference matrix and the color conversion matrices; and

    a color measuring unit to color-measure the image and to output corresponding color-measured LAB color coordinates,wherein the reference matrix represents a correlation between the color-measured LAB color coordinates and the digital color coordinates.

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