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Proceedings Paper

Smooth colorimetric calibration technique utilizing the entire color gamut of CMYK printers
Author(s): Po-Chieh Hung
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Paper Abstract

In order to achieve an ideal colorimetric calibration for CMYK (Cyan, Magenta, Yellow, and Black) printers, we propose a novel CMYK determination technique under the restrictions of a colorimetric match, use of the entire color gamut and a smooth gradation of each primary color. The algorithm proposed here includes the following steps: (1) Obtain the two extreme conditions for CMYK combinations to be able to utilize the entire CMYK gamut, namely Maximum Black technique and Minimum Black, (2) Determine an arbitrary black amount between the two conditions, (3) Apply a smoothing technique for the black amount in a uniform color space, (4) Determine the remaining colors, CMY, for colorimetric match. An iterative smoothing technique in a uniform color space is introduced to obtain visually "smoothed" black gradations. The gradation quality for each primary color is evaluated with a hypothetical unstable printer. The smoothed CMYK technique eliminates sudden changes for each primary color, so that a printer using this technique becomes robust against a change of characteristic curves of the printer such as dot gain.

Paper Details

Date Published: 9 May 1994
PDF: 12 pages
Proc. SPIE 2171, Color Hard Copy and Graphic Arts III, (9 May 1994); doi: 10.1117/12.175316
Show Author Affiliations
Po-Chieh Hung, Konica Corp. (Japan)

Published in SPIE Proceedings Vol. 2171:
Color Hard Copy and Graphic Arts III
Jan Bares, Editor(s)

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