Method for and apparatus for determining an optimum gradation pa

Details Method for and apparatus for determining an optimum gradation pa Method for and apparatus for determining an optimum gradation pa

1984-10-30

1986-08-05

Adams, Russell E.

354 65, G03B 708, G03B 3900

Patent

active

046039600

ABSTRACT:
A method and apparatus for determining an optimum development parameter, particularly for use in developing aerial photographs, in which the entire brightness of terrain objects to be imaged is converted into corresponding density values which are used in developing an aerial photograph. The method comprises the steps of detecting a terrain brightness by means of a photodetector array, processing the obtained measuring values in selecting maximum and minimum values, subjecting the latter values to a smoothing operation and determining a relevant gradation value. The gradation value is displayed and/or stored and used in the development of the exposed film material, taking into consideration the respective parameters.

REFERENCES:
patent: 4047187 (1977-09-01), Mashimo et al.
patent: 4214826 (1980-07-01), Uchida et al.
patent: 4217046 (1980-08-01), Weinstein et al.
patent: 4309091 (1982-01-01), Fukuhara et al.
patent: 4364650 (1982-12-01), Terasita et al.
patent: 4394078 (1983-07-01), Terasita
patent: 4395099 (1983-07-01), Terasita

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