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Image recording apparatus

  • US 5,568,284 A
  • Filed: 08/05/1994
  • Issued: 10/22/1996
  • Est. Priority Date: 03/27/1991
  • Status: Expired due to Term
First Claim
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1. A method employed by an image recording apparatus, which receives image signals representing colors, for compressing a color reproduction region of the image recording apparatus in a uniform color space, comprising the step of compressing said colors outside the color reproduction region onto a surface of the color reproduction region at respective points, which represent the minimum color difference between said colors before and after compression, without changing the color tint of said colors, said compressing step further comprising the steps of:

  • plotting those of said colors whose color shape appears to be of the same hue on a plane of a* and b* in a color space of L*, a* and b*, so that the resultant loci are curve-approximated by functions; and

    moving, according to the curve-approximated loci, an intended color to project the colors onto their respective points of the minimum color difference between the colors before and after compression without varying the color tint.

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