Color reduction dependent on tone

Details Color reduction dependent on tone Color reduction dependent on tone

1983-03-28

1985-11-05

Masinick, Michael A.

Facsimile and static presentation processing

Static presentation processing

Attribute control

H04N 146

Patent

active

045517517

ABSTRACT:
Given color reduction depending on tone in four-color printing, wherein the color components of the chromatic printing inks yellow, magenta and cyan are reduced and the amount of black printing ink is increased to compensate for such reduction, a achromatic synthesis is employed up to a gray tone value which corresponds to the full tone of the black printing ink employed and the color components of the chromatic printing inks are again increased proceeding from that gray tone value up to the maximum shadow in order to get desired densities in the overprint.

REFERENCES:
patent: 2807660 (1957-09-01), Rose
patent: 2981792 (1961-04-01), Farber
patent: 3885244 (1975-05-01), Keller
patent: 4346402 (1982-08-01), Pugsley
patent: 4402015 (1983-08-01), Yamada
patent: 4468692 (1984-08-01), Yamada
patent: 4482917 (1984-11-01), Gaulke
FOGRA-Forschungsbericht 1.203, Untersuchungen Zur _Veranderung des Farbsatzaufbaues durch geanderte fur die Teilfarbe Schwarz von Gunter Otschik, Chapter 3.1, p. 4.

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