Color copying machine using signal conversion

Details Color copying machine using signal conversion Color copying machine using signal conversion

1982-10-28

1984-09-04

Prescott, A. C.

Photocopying

Including fiber optics

355 14C, 355 14R, 430 43, 118645, 2503161, 250319, G03G 1501

Patent

active

044694334

ABSTRACT:
A color copying machine includes a device separating the image information from each area of the original into colors corresponding to predetermined recording colors to thereby form corresponding video signals. A preferential selection circuit converts each video signal into a 2-level signal and performs an arithmetic operation on each 2-level signal to thereby key the image information from each area of the original to one of the recording colors or white. Black is selected as the recording color if a chromatic color competes with black in the same area.

REFERENCES:
patent: 4204728 (1980-05-01), Goshima et al.
patent: 4275958 (1981-06-01), Tachika et al.
patent: 4336994 (1982-06-01), Banton
patent: 4349268 (1982-09-01), Hirata
patent: 4374397 (1983-02-01), Mir

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