Apparatus for automatically printing color photographs

Details Apparatus for automatically printing color photographs Apparatus for automatically printing color photographs

1977-06-22

1978-10-17

Griffin, Donald

Photocopying

Projection printing and copying cameras

Multicolor picture

355 77, G03B 2778, G03B 2732

Patent

active

041205812

ABSTRACT:
Red, green and blue densities of a number of points on a color negative or original are measured and the measured values are plotted in a coordinate system. When the measured values of the densities are contained in a predetermined region of the coordinate system defined as the flesh color region, the measured point is determined to be of flesh color. When the number of points determined to be of flesh color is not less than 13 among 748 points sampled, for instance, the color original is determined to have a subject matter of a human figure. Then, in printing the color negative the exposure is controlled to reproduce a flesh color of desired color balance and density.

REFERENCES:
patent: 2571697 (1951-10-01), Evans
patent: 3292488 (1966-12-01), Griffith
patent: 3677641 (1972-07-01), King et al.
patent: 3708676 (1973-01-01), Hubol et al.
patent: 3724947 (1973-04-01), Paulus
patent: 3790275 (1974-02-01), Hubol et al.

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