1 July 2005 Spectral reflection and dot surface prediction models for color halftone prints
Author Affiliations +
J. of Electronic Imaging, 14(3), 033001 (2005). doi:10.1117/1.1989987
The proposed new spectral reflection model enhances the classical Clapper-Yule model by taking into account the fact that proportionally more incident light through a given colorant surface is reflected back onto the same colorant surface than onto other colorant surfaces. It comprises a weighted mean between a component specifying the part of the incident light that exits through the same colorant as the colorant from which it enters (Saunderson corrected Neugebauer component) and a component specifying the part of the incident light whose emerging light components exit from all colorants (Clapper-Yule component). We also propose models for taking into account ink spreading, a phenomenon that occurs when printing an ink halftone in superposition with one or several solid inks. The ink-spreading model incorporates nominal-to-effective surface coverage functions for each of the different ink superposition conditions. A system of equations yields the effective ink surface coverages of a color halftone as a weighted mean of the ink surface coverages specific to the different superposition conditions. The new spectral reflection prediction model combined with the ink-spreading model yields excellent spectral reflection predictions for clustered-dot color halftones printed on an offset press or on thermal transfer printers.
Roger David Hersch, Patrick Emmel, Fabien Collaud, Frederique Crete, "Spectral reflection and dot surface prediction models for color halftone prints," Journal of Electronic Imaging 14(3), 033001 (1 July 2005). http://dx.doi.org/10.1117/1.1989987





Spectral models




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