Apparatus for determining a color filter value for the exposure

Details Apparatus for determining a color filter value for the exposure Apparatus for determining a color filter value for the exposure

1991-08-16

1992-11-17

Gellner, Michael L.

Photocopying

Projection printing and copying cameras

Multicolor picture

355 77, G03B 2780

Patent

active

051647648

ABSTRACT:
An apparatus for determining a color filter value, which is to be used for a specific original for exposing a gradation change paper, comprises a recording device (16), an inverting circuit (17) and a monitor (18), which operates in a black-and-white mode of operation, as well as an electronic contrast control device used for said monitor (18) and calibrated such that each adjustment value of the electronic contrast control device has associated therewith a color filter value which relates to a color filter (8, 29) to be used upon exposing the gradation change paper and on the basis of which a contrast of the print corresponding to that of the image on the monitor will be achieved.

REFERENCES:
patent: 3800070 (1974-03-01), Barbieri
patent: 4885607 (1989-12-01), Farb

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