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Proceedings Paper

Simplified ink spreading equations for CMYK halftone prints
Author(s): Thomas Bugnon; Mathieu Brichon; Roger David Hersch
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Paper Abstract

The Yule-Nielsen modified spectral Neugebauer model enables predicting reflectance spectra from surface coverages. In order to provide high prediction accuracy, this model is enhanced with an ink spreading model accounting for physical dot gain. Traditionally, physical dot gain, also called mechanical dot gain, is modeled by one ink spreading curve per ink. An ink spreading curve represents the mapping between nominal to effective dot surface coverages when an ink halftone wedge is printed. In previous publications, we have shown that using one ink spreading curve per ink is not sufficient to accurately model physical dot gain, and that the physical dot gain of a specific ink is modified by the presence of other inks. We therefore proposed an ink spreading model taking all the ink superposition conditions into account. We now show that not all superposition conditions are useful and necessary when working with cyan, magenta, yellow, and black inks. We therefore study the influence of ink spreading in different superposition conditions on the accuracy of the spectral prediction model. Finally,

Paper Details

Date Published: 28 January 2008
PDF: 12 pages
Proc. SPIE 6807, Color Imaging XIII: Processing, Hardcopy, and Applications, 680717 (28 January 2008); doi: 10.1117/12.761710
Show Author Affiliations
Thomas Bugnon, Ecole Polytechnique Fédérale de Lausanne (Switzerland)
Mathieu Brichon, Ecole Polytechnique Fédérale de Lausanne (Switzerland)
Roger David Hersch, Ecole Polytechnique Fédérale de Lausanne (Switzerland)

Published in SPIE Proceedings Vol. 6807:
Color Imaging XIII: Processing, Hardcopy, and Applications
Reiner Eschbach; Gabriel G. Marcu; Shoji Tominaga, Editor(s)

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