Color correction apparatus for a duplicate camera

Details Color correction apparatus for a duplicate camera Color correction apparatus for a duplicate camera

1981-08-31

1983-03-08

Gellner, Michael L.

Photocopying

Projection printing and copying cameras

Multicolor picture

355 71, G03B 2773

Patent

active

043759181

ABSTRACT:
A color correction apparatus for a duplicate camera wherein three color correction filters of three primary colors are provided and are selectively interposed into the exposure light path, is disclosed. An arithmetic unit is connected to a color correction value setup means which sets up color correction values of colors to be removed from an original picture, and it receives these density values as negative values and subtracts the minimum value thereof from each of the other density values to outputs a color correction signal. Then, a control unit connected to the arithmetic unit controls the color correction filters so that they may be interposed into the exposure light path according to the color correction signal.

REFERENCES:
patent: 4101217 (1978-07-01), Fergg et al.
patent: 4120581 (1978-10-01), Takahashi et al.
patent: 4279502 (1981-07-01), Thurm et al.

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