Method of and an apparatus for classifying color films

Details Method of and an apparatus for classifying color films Method of and an apparatus for classifying color films

1980-03-10

1983-12-27

Evans, F. L.

Photocopying

Projection printing and copying cameras

Identifying, composing, or selecting

355 32, G03B 2752

Patent

active

044227523

ABSTRACT:
An exposed color film having an exposed zone is provided with color areas prior to developing the same by exposing this unexposed zone to light passing through different narrow-band filters. After developing the film, the transmissivities of each of the color areas within a pair of narrow-band ranges is measured. The measured values are compared with known values for various types of film to establish the type of the particular color film. This information is used to adjust the exposures in the different colors when the images on the color film are copied onto a photographic copying material.

REFERENCES:
patent: 3835297 (1974-09-01), Inoue et al.
patent: 4264196 (1981-04-01), von Stein

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