Method of determining exposure condition of photograph

Details Method of determining exposure condition of photograph Method of determining exposure condition of photograph

1996-10-04

2000-05-02

Coles, Edward L.

Image analysis

Applications

Document or print quality inspection

382168, 356443, 25055902, G06K 900, G01N 2100, G01N 2186

Patent

active

060582022

ABSTRACT:
A histogram of densities represented by image signal components of an image signal obtained by reading out an image from a photographic film is created. The density at a particular point on the histogram and the dynamic range of the image signal are obtained. It is determined that the photographic film was underexposed when the density of the particular point is smaller than a first predetermined density and at the same time the dynamic range of the image signal is smaller than a predetermined value, and that the photographic film was overexposed when the density of the particular point is larger than a second predetermined density and at the same time the dynamic range of the image signal is smaller than a predetermined value.

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