Verification apparatus

Details Verification apparatus Verification apparatus

1986-05-06

1987-03-31

Hayes, Monroe H.

Photocopying

Projection printing and copying cameras

With film severing

355 27, 355 41, G03B 2900, G03B 2752

Patent

active

046539000

ABSTRACT:
A verification apparatus for verifying a negative image on film and a positive image on photographic paper against each other. Respective transmission densities of a plurality of picture elements of the film image and respective reflection densities of a plurality of picture elements of the photographic paper image are detected, and comparison is made between the transmission density of each of the picture elements of the film image and the reflection density of the corresponding picture element of the photographic paper image, thereby making judgement as to whether or not the photographic paper image and the film image correspond to each other.

REFERENCES:
patent: 3411007 (1968-11-01), Thompson
patent: 3690765 (1972-09-01), Rickard et al.
patent: 3836754 (1974-09-01), Toye et al.
patent: 4293215 (1981-10-01), Rosborough et al.

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