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Operator adjustable color image processing

  • US 4,972,257 A
  • Filed: 04/03/1989
  • Issued: 11/20/1990
  • Est. Priority Date: 04/03/1989
  • Status: Expired due to Term
First Claim
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1. A printing system in which the color of a copy being formed from an original document is adjustable, including:

  • means for scanning the original document and measuring a set of primary color densities therein;

    operator controllable means, in communication with said scanning means, for converting the measured set of primary color densities to signals corresponding to a set of operator selected subtractive primary color densities, said converting means comprising first means for changing the measured set of primary color densities to a set of colorimetric coordinates, operator abjustable means, in communication with said changing means, for varying the set of colorimetric coordinates, said varying means varying the set of colorimetric coordinates to adjust independently or in combination with one another darkness, hue or saturation of the set of subtractive primary color densities and second means, in communication with said varying means, for changing the operator abjusted set of colorimetric coordinates to signals corresponding to the set of operator selected subtractive primary color densities; and

    a marking engine which receives the signals from said converting means and forms a copy of the original document in response thereto.

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