Method for tone reproduction in image forming system

Details Method for tone reproduction in image forming system Method for tone reproduction in image forming system

1989-03-08

1990-03-13

Walberg, Teresa J.

Facsimile and static presentation processing

Facsimile

Recording apparatus

346140R, 358 79, 358 80, 358456, G03F 308, H04N 121, G01D 1516

Patent

active

049087126

ABSTRACT:
A method for reproduction of a multi-tone color image by combination of chromatic inks of cyan, magenta and yellow together with an achromatic ink of black. In the region of lower tone levels than a prescribed value, the image is formed by the complete under color removal, namely, by the sole use of the achromatic ink. In the region of higher tone levels than the prescribed value, the reproduction of the image is attained by performing the under color removal at a ratio of decrease relative to the rise of the tone levels, namely by causing the chromatic inks to overlap the achromatic ink.

REFERENCES:
patent: 4673951 (1987-06-01), Mutoh et al.
patent: 4682186 (1987-07-01), Sasaki
patent: 4682216 (1987-06-01), Sasaki et al.
patent: 4683492 (1987-07-01), Sugiura

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