Color image-forming machine which selects different masking oper

Details Color image-forming machine which selects different masking oper Color image-forming machine which selects different masking oper

1996-09-17

1998-08-18

Frahm, Eric

Facsimile and static presentation processing

Facsimile

Recording apparatus

358530, 358538, 382164, 382283, H04N 140, H04N 146, G06K 936, G06K 980

Patent

active

057964912

ABSTRACT:
A color image-forming machine 08/715 000 includes a color image signal-forming device for outputting digital signals Cd, Md and Yd expressing, on tone levels, the three primary colors C, M and Y for a number of pixels, and a masking device for correcting the digital signals Cd, Md and Yd in compliance with masking operation expressions. A color region discrimination device is provided to discriminate, based on the digital signals Cd, Md and Yd, to which one of a plurality of predetermined color regions each of a number of pixels belong. The masking device corrects the digital signals Cd, Md and Yd by selecting different masking operation expressions depending upon each of the plurality of color regions.

REFERENCES:
patent: 5162860 (1992-11-01), Nami et al.
patent: 5594558 (1997-01-01), Usami et al.

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