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Color printing

  • US 20060268294A1
  • Filed: 05/18/2005
  • Published: 11/30/2006
  • Est. Priority Date: 05/18/2005
  • Status: Active Grant
First Claim
Patent Images

1. A method of processing cyan, magenta, and yellow color values C1, M1, Y1, comprising:

  • transforming the C1, M1, Y1 color values to cyan, magenta, and yellow color values C, M, Y in such a manner that each of C, M, Y is not greater than a predetermined maximum value VMAX;

    obtaining blue, cyan and magenta output color values by setting B=0, Cout=C, and Mout=M;

    if the sum C+M is greater than VMAX, obtaining blue, cyan and magenta output color values B, Cout, Mout such that B+Cout+Mout=VMAX;

    half-toning B, Cout, Mout and Y using a first threshold array A1 for B, Cout and Mout, and a second threshold array A1

    for Y, wherein the second threshold array A1

    is replica of the first threshold array A1 that is shifted relative to the first threshold array A1 by one pixel.

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