Photographic printing system

Details Photographic printing system Photographic printing system

1989-10-03

1991-02-05

Hix, L. T.

Photocopying

Projection printing and copying cameras

Multicolor picture

355 77, G03B 2780

Patent

active

049909509

ABSTRACT:
A photographic printing system for automatically determining an exposure correction value is used in a printer to correct, if necessary, an exposure effected based on large area transmittance densities. The system includes an image sensor disposed between the printer and a data reading device for measuring a number of points of the frame of the photographic film, and outputting density data of the frame accordingly. A data operation unit is provided to calculate exposure correction data for the frame based on the data from the data reader and the sensor.

REFERENCES:
patent: 4099862 (1978-07-01), Bickl et al.
patent: 4797712 (1989-01-01), Hayashi et al.
patent: 4873546 (1989-10-01), Zahn et al.

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