System for recording information on photographic image density a

Details System for recording information on photographic image density a System for recording information on photographic image density a

1983-10-05

1985-11-05

Pianalto, Bernard D.

Optics: measuring and testing

For light transmission or absorption

Of photographic film

356404, G01N 2100

Patent

active

045510237

ABSTRACT:
The invention relates to a system for recording information on the densities of various points of a photographic image such as a negative film by means of a photoelectric converter. The information on densities that change by small degrees as the image is scanned from its periphery toward the center is eliminated, and, if desired, the information on the density for areas discrete from the area having the density corresponding to the eliminated information and which has a density substantially the same as the density of that area is also eliminated.

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