Method of and apparatus for forming a color picture using a plur

Details Method of and apparatus for forming a color picture using a plur Method of and apparatus for forming a color picture using a plur

1984-02-27

1986-12-23

Groody, James J.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 75, G03F 308, H04N 146

Patent

active

046315780

ABSTRACT:
In a method and apparatus for forming a high quality color picture, a color space is divided into several areas and the color correction processing is performed using a different color-correction function for every area. The disclosed method and apparatus are particularly adapted to eliminate false lines ("pseudo boundaries") in pictures formed using colorants having different concentrations or densities. The false lines or "pseudo boundaries" occur at points where a colorant of one concentration is replaced by a colorant of a different concentration, and are eliminated by switching between two color correction processing means corresponding to the two colorants of different concentrations in a mutually exclusive random or alternating manner.

REFERENCES:
patent: 4314274 (1982-02-01), Atoji et al.
patent: 4414635 (1983-11-01), Gast et al.
patent: 4488245 (1984-12-01), Dalke et al.
patent: 4533928 (1985-08-01), Sugiura et al.
patent: 4560997 (1985-12-01), Sato et al.

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