Color image signal processing method and apparatus for recording

Details Color image signal processing method and apparatus for recording Color image signal processing method and apparatus for recording

1987-08-12

1990-10-23

Groody, James J.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 75, 358 79, H04N 146

Patent

active

049656643

ABSTRACT:
A color image signal processing apparatus for recording a color image from input color image signals includes an input unit for inputting color image signals composed of a plurality of color component signals into the apparatus, a unit for obtaining a luminance signal, a hue signal and a chroma signal based on the plurality of inputted color component signals, a gradation converter for converting the gradation characteristic of the luminance signal, and a color correction unit for performing color correction based on the luminance signal converted by the gradation converter, the hue signal and the chroma signal, and obtaining a recording original color signal. The hue and chroma signals are obtained based on spectrum tristimulus values which are obtained through conversion of said color component signals. The present invention thus enables more accurate color reproduction since it uses individual gradation conversion of the luminance signal.

REFERENCES:
patent: 2807660 (1957-09-01), Rose
patent: 2848528 (1958-08-01), Woll
patent: 2939908 (1960-06-01), Shapiro
patent: 4058828 (1977-11-01), Ladd
patent: 4500919 (1985-02-01), Schreiber
patent: 4623973 (1986-11-01), Hoffrichter et al.
patent: 4661843 (1987-04-01), Sekizawa et al.
patent: 4667228 (1987-05-01), Kawamura et al.
patent: 4675704 (1987-06-01), Yamamoto
patent: 4731662 (1988-03-01), Udagawa et al.
patent: 4745466 (1988-05-01), Yoshida et al.
patent: 4752822 (1988-06-01), Kawamura
patent: 4758885 (1988-07-01), Sasaki et al.

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