Printing – Inkers – Roller
Patent
1997-04-08
1999-08-03
Coles, Edward L.
Printing
Inkers
Roller
101 23, 345431, 430358, 430359, G06F 1500, B41F 1902, G03C 700
Patent
active
059335785
ABSTRACT:
A method and apparatus for determining a small number of parameters that spectrally characterize colorants by a small number of parameters and for using such colorant parameters to predict the spectral reflection or transmission characteristics of such colorants when laid on top of one another, either on an opaque, transparent or semitransparent carrier of a particular type, each colorant laid with a certain coverage percentage, for example, dot percentage in the case of offset printing, the colorant parameters of any colorant being substantially independent of the color of the substrate. The method involves making measurements of sets prints of varying coverage percentages of a colorant on a number of backgrounds, and solving the resulting set of equations for the colorant. Colorants that are defined by a recipe of basic colorants can be characterized from measurements on prints of the basic colorants.
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PCT search report for PCT Application number PCT/BE98/00050 (mailed Aug. 8, 1998).
"Usage of the Chameleon Accelerator for Color Transformations" by J. P. Van de Capelle and L. Plettinck, Proceedings of the second IS&T/SID Color Imaging conference on Color Science, Systems and Applications, pp. 165-166, Nov. 1994.
"Kubelka-Munk Theory and the Prediction of Reflectance," by James H. Nobbs, Rev. Prog. Coloration, vol. 15, pp. 66-75, 1985.
"Predicting the Spectral Behavior of Colour Printers for Transparent Inks on Transparent Support," by P. Emmel, I. Amidror, V. Ostromoukhov, and R.J. Hersch, Proceedings of the Fourth IS&T/SID Color Imaging Conference on Color Science, Systems and Applications, pp. 86-91, Nov. 1996.
Meireson Baldewin
Van de Capelle Jean-Pierre
Barco Graphics N.V.
Coles Edward L.
Rosenfeld Don
Wallerson Mark
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