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Proceedings Paper

Robust and fast numerical color separation for mathematical printer models
Author(s): Werner Praefcke
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Paper Abstract

Halftone color printers can be mathematically modeled rather accurately using the Neugebauer equations or the Yule- Nielsen equations. However, the color separation which is the inverse of the printer model is not an easy task. For obtaining the printer driving parameters needed for a color the most appropriate methods comprises lookup tables, iterative inversion of the model, or an approximation. In order to avoid the memory requirement of a lookup table we investigate the suitability of the latter two approaches for the inversion of the Neugebauer and the Yule-Nielsen model in three and four color printing. The iterative approach is based on the Newton gradient scheme, the approximate approach consists of a refinement of the very simple method CMY equals 1 - RGB. We compare both the results to the optimally achievable results and demonstrate the only slightly inferior results.

Paper Details

Date Published: 22 December 1998
PDF: 9 pages
Proc. SPIE 3648, Color Imaging: Device-Independent Color, Color Hardcopy, and Graphic Arts IV, (22 December 1998); doi: 10.1117/12.334565
Show Author Affiliations
Werner Praefcke, Technical Univ. Aachen (Germany)


Published in SPIE Proceedings Vol. 3648:
Color Imaging: Device-Independent Color, Color Hardcopy, and Graphic Arts IV
Giordano B. Beretta; Reiner Eschbach, Editor(s)

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