1 April 2008 Misregistration sensitivity in clustered-dot color halftones
Author Affiliations +
J. of Electronic Imaging, 17(2), 023004 (2008). doi:10.1117/1.2917517
Abstract
Halftoned separations of individual colorants, typically cyan, magenta, yellow, and black, are overlaid on a print substrate in typical color printing systems. Displacements between these separations, commonly referred to as “interseparation misregistration," can cause objectionable color shifts in the prints. We study this misregistration-induced color shift for periodic clustered-dot halftones using a spatiospectral model for the printed output that combines the Neugebauer model with a periodic lattice representation for the individual halftones. Using Fourier analysis in the framework of this model, we obtain an analytic characterization for the conditions for misregistration invariance in terms of colorant spectra, periodicity of the individual separation halftones, dot shapes, and misregistration displacements. We further exploit the framework in a hybrid analytical-numerical simulation that allows us to obtain quantitative estimates of the color shifts due to misregistration, thereby providing a characterization for these shifts as a function of the optical dot gain, halftone periodicities, spot shapes, and interseparation misregistration amounts. We present simulation results that demonstrate the impact of each of these parameters on the color shift and demonstrate qualitative agreement between our approximation and experimental data.
Basak Oztan, Gaurav Sharma, Robert Paul Loce, "Misregistration sensitivity in clustered-dot color halftones," Journal of Electronic Imaging 17(2), 023004 (1 April 2008). http://dx.doi.org/10.1117/1.2917517
Submission: Received ; Accepted
JOURNAL ARTICLE
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KEYWORDS
Halftones

Printing

CMYK color model

Fourier transforms

Curium

Matrices

Systems modeling

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