Color image processing method and apparatus

Details Color image processing method and apparatus Color image processing method and apparatus

2006-10-17

2006-10-17

Poon, King Y. (Department: 2626)

Facsimile and static presentation processing

Natural color facsimile

Color correction

C382S167000

Reexamination Certificate

active

07123391

ABSTRACT:
Color image processing method and apparatus which perform color separation to separate colors of image data to color-material colors of primary CMYK colors and pale colors of cyan (C) and magenta (M) of the primary colors. A target gray line to connect white to black for color separation is set in predetermined color space, the combination of color materials of 3 colors are obtained to realize a color on the target gray line, color material amounts of the primary CMYK colors are determined to realize the color on the target gray line, and a total color material amount is determined to realize the target gray line. Regarding a color which cannot be realized by a combination of primary Y color and pale C and M colors to realize the color on the target gray line, respective color material amounts of the primary CMYK and pale colors are determined based on the total color material amount and the color material amounts of the primary 4 colors.

REFERENCES:
patent: 2002/0021458 (2002-02-01), Saito et al.

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