Hue identifying apparatus

Details Hue identifying apparatus Hue identifying apparatus

1982-06-02

1985-08-13

Krass, Errol A.

Boots, shoes, and leggings

355 38, 358 80, 364571, G03F 308, G01J 346

Patent

active

045354138

ABSTRACT:
A hue identifying apparatus for use in color printing, comprising a device for creating high and low order address signals from the difference between a combination of two of the red, green and blue density signals read out at each point on a color photographic film and from that between another combination of two of said signals, and a hue region memory storing at each address the hue information based on a predetermined hue region defined in a two-dimensional coordinate system wherein the axes represent quantized values of the density differences. The address is designated by the high and low order address signals. The apparatus may further have a device for detecting inadequate exposure on the basis of the three-color density signals, and a device for obstructing the transfer of the hue information from the hue region memory or for selecting one of a plurality of hue region memories based on the output of the inadequate exposure detecting means.

REFERENCES:
patent: 4060829 (1977-11-01), Sakamoto
patent: 4168121 (1979-09-01), Freier et al.
patent: 4231097 (1980-10-01), Shibayama et al.
patent: 4244654 (1981-01-01), Asai et al.
patent: 4314274 (1982-02-01), Atoji et al.
patent: 4328515 (1982-05-01), Wellendorf
patent: 4334240 (1982-06-01), Franklin
patent: 4335398 (1982-06-01), Yamada
patent: 4346402 (1982-08-01), Pugsley
patent: 4414635 (1983-11-01), Gast et al.

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