System for softproofing a color reproduction

Details System for softproofing a color reproduction System for softproofing a color reproduction

1992-10-06

1994-03-22

Coles, Sr., Edward L.

Facsimile and static presentation processing

Natural color facsimile

Color photography previewer

358504, 358523, 358518, 358534, H04N 146

Patent

active

052969479

ABSTRACT:
Cyan, magenta, yellow and black ink are each used to print a color patch to obtain four color patches. Two of each pair of the three colorants cyan, magenta and yellow are used to print a red, a green and a blue patch. These seven color patches together with a patch formed by the printing medium with no colorant form eight color patches. A color monitor is adjusted until its screen color matches one of the eight color patches and the appearance values of the monitor are noted. This is repeated for each of the eight patches in order to compile a lookup table for the colors in each of the eight color patches. For softproofing, each square in a color grid pattern printed by the printer will contain portions, each of which has a color identical to one of the eight color patches. Using the lookup table, the values of the appearance signals corresponding to the colors of these portions in the square area are obtained for displaying a color patch on the color monitor of the same color. In this manner, the color image displayed by the monitor will closely resemble the printing result using actual inks.

REFERENCES:
patent: 3972066 (1976-07-01), Seki et al.
patent: 4500919 (1985-02-01), Schreiber
patent: 4691229 (1987-09-01), Colditz et al.
patent: 4769696 (1988-09-01), Utsuda et al.
patent: 4958220 (1990-09-01), Alessi et al.

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