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Color correction of contone images in a multiple print engine system

  • US 6,219,155 B1
  • Filed: 01/12/1999
  • Issued: 04/17/2001
  • Est. Priority Date: 08/07/1995
  • Status: Expired due to Term
First Claim
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1. A method for correcting the operation of a marking engine in a color printer when reproducing a contone image, the marking engine having the capability of changing the toner density parameters thereof to affect the contone reproduction operation of the marking engine for a given input RIPed image, comprising the steps of:

  • generating a plurality of discrete contone images in a test pattern, each correlating bit values of a contone image to different values of the toner density parameters of the marking engines;

    running the test pattern through the marking engines to provide an output;

    visually selecting one of the discrete contone images on the output of the marking engine in accordance with predetermined criteria; and

    changing the toner density parameters of the marking engine to the value associated with the selected one of the discrete contone images on the output.

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