Accuracy of color conversion profile

Details Accuracy of color conversion profile Accuracy of color conversion profile

2004-04-15

2008-03-18

Poon, King Y. (Department: 2625)

Facsimile and static presentation processing

Static presentation processing

Attribute control

C358S518000, C358S523000, C358S520000, C358S002100, C382S167000, C382S162000, C382S166000, C382S164000, C345S604000, C345S600000, C345S589000, C345S603000

Reexamination Certificate

active

07345787

ABSTRACT:
A method for determining lattice points to be referenced to prepare the correspondence defining data, said method including steps of prescribing a smoothness evaluation function which has a function form differing depending on each region in the color gamut to which the lattice point to be evaluated belongs and also contains a constraint condition that the closer the lattice point is to the boundary of the region of the color gamut, the more the evaluated value decreases as the result of its movement, optimizing the arrangement of lattice points in the device-independent color space by improving the rating of the smoothness evaluation function, with the lattice point position information in the low-dimensional color space varied, and determining lattice points to be referenced to prepare the correspondence defining data in the optimized state.

REFERENCES:
patent: 5504821 (1996-04-01), Kanamori et al.
patent: 6128407 (2000-10-01), Inoue et al.
patent: 6335734 (2002-01-01), Nagae et al.

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