Color data conversion apparatus and method using gamut...

Details Color data conversion apparatus and method using gamut... Color data conversion apparatus and method using gamut...

2006-02-16

2009-12-01

Haskins, Twyler L (Department: 2625)

Facsimile and static presentation processing

Natural color facsimile

Black signal synthesis

C358S515000, C358S518000, C358S520000, C358S523000, C382S162000

Reexamination Certificate

active

07626742

ABSTRACT:
A color data conversion apparatus and method. The color data conversion apparatus includes a K ratio calculator for outputting a K ratio that is calculated using entered color data; a K ratio adjuster for adjusting the calculated K ratio, which is output from the K ratio calculator, in reference to gamut boundary descriptors (GBDs) corresponding to a K ratio and outputting the adjusted K ratio as a final K ratio; and a CMY ratio calculator for calculating C, M, and Y ratios based on the final K ratio. When converting the entered color data to the CMYK data, the calculated K ratio can be adjusted to the K ratio printable by use of the K GBDs. Accordingly, the printing apparatus can substantially print according to the calculated K ratio and thus the degradation of the printing quality can be avoided.

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