Facsimile and static presentation processing – Static presentation processing – Attribute control
Reexamination Certificate
2003-01-15
2008-08-12
Moore, David K (Department: 2625)
Facsimile and static presentation processing
Static presentation processing
Attribute control
C358S002100, C358S525000, C382S162000, C382S167000, C382S264000, C345S590000
Reexamination Certificate
active
07411696
ABSTRACT:
Systems and methods are disclosed of a smooth gray component replacement strategy which utilizes the full gamut of a printer device. A CMY to CMYK gray component replacement transform is disclosed which inherently exploits the full gamut of the printer, by transforming points in CMY cube to L*a*b* color space, scaling the obtained values so they fill the maximum gamut obtainable with the printer device and calculating the CMYK values needed to obtain the scaled L*a*b* values. The CMY to CMYK transform is then smoothed with an averaging filter that does not change CMYK values at the corners. The entire color gamut is adequately sampled and small changes in CMY do not produce large jumps in L*a*b*.
REFERENCES:
patent: 4275413 (1981-06-01), Sakamoto et al.
patent: 4500919 (1985-02-01), Schreiber
patent: 5243414 (1993-09-01), Dalrymple et al.
patent: 5305119 (1994-04-01), Rolleston et al.
patent: 5317426 (1994-05-01), Hoshino
patent: 5592311 (1997-01-01), Hibi
patent: 5710824 (1998-01-01), Mongeon
patent: 7019868 (2006-03-01), Chang et al.
Littlewood et al., “Pareto-Optimal Formulations for Cost Versus colorimetric Accuracy Trade-Offs in Printer Color Management,” Apr. 2002, pp. 132-175, vol. 21, No. 2, ACM Transactions on Graphics.
Kang et al., “Methods of Colour Gamut Extension Algorithm Development Using Experimental Data,” Sep. 15, 1999, pp. 352-355, vol. 1, Tencon 99. Proceedings of the IEEE Region 10 Conference Cheju Island, South Korean.
Nin et al., “Printig CIELAB Images On a CMYK Printer Using Tri-Linear Interpolation,” Feb. 11, 1992, pp. 316-324, vol. 1670, Proceedings of the SPIE.
Lett Thomas J
Moore David K
Oliff & Berridge PLC.
Xerox Corporation
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