Device for converting video image signals to printing data signa

Details Device for converting video image signals to printing data signa Device for converting video image signals to printing data signa

1988-03-16

1989-12-12

Groody, James J.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 75, H04N 146

Patent

active

048871508

ABSTRACT:
A color converting device for converting R, G and B image signals representing red, green and blue colors, respectively, into a three color or four color printing data indicative of three colors of yellow, magenta and cyan or four colors of yellow, magenta, cyan and black, which device comprises a divider for dividing the image signals into achromatic and chromatic color components for each picture element; a first converter for converting the chromatic color components so divided into a first color conversion data Y1, N1 and C1 representative of the yellow, magenta and cyan colors, respectively; a second converter for converting the achromatic color component into a second color conversion data Y2, M2 and C2, or into a third color conversion data K; an adder for summing the first and second color conversion data Y1, M1, C1, Y2, M2 and C2 together to provide the three color printing data, or an output circuit for outputting both the first color conversion data Y1, M1 and C1 and a third color conversion data K as the four color printing data.

REFERENCES:
patent: 4060829 (1977-11-01), Sakamoto
patent: 4335398 (1982-06-01), Yamada
patent: 4386267 (1983-05-01), Yamada
patent: 4402007 (1983-08-01), Yamada
patent: 4656505 (1987-04-01), Yamada et al.
patent: 4661843 (1987-04-01), Sekizawa et al.
patent: 4682216 (1987-07-01), Sasaki et al.

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