Method and apparatus for exposure correction in color printing f

Details Method and apparatus for exposure correction in color printing f Method and apparatus for exposure correction in color printing f

1986-10-09

1987-11-17

Wintercorn, Richard A.

Photocopying

Projection printing and copying cameras

Multicolor picture

G03B 2780

Patent

active

047071206

ABSTRACT:
A standard exposure is established to make a desirable color print from a standard negative frame of a specific type of color original film. A negative frame of a color original film from which a color print is to be made is visually observed to judge the difference in color balance and in density from the standard frame and to determine correction values according to these differences. Upon printing, the type of the color original film is automatically detected, so as to choose automatically the appropriate one of the correction values which have been previously established according to the differences in density of various types of color original films. The frame-dependent correction values and the film-type-dependent correction value are added, so as to provide a total correction value based on which the standard exposure is corrected so as to make a fine color print from the frame.

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patent: 4403854 (1983-09-01), von Stein et al.
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patent: 4448521 (1984-05-01), Shiota
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patent: 4577961 (1986-03-01), Terashita
patent: 4659213 (1987-04-01), Matsumoto

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