Color signal emphasizing/de-emphasizing circuit

Details Color signal emphasizing/de-emphasizing circuit Color signal emphasizing/de-emphasizing circuit

1990-05-04

1991-12-31

Boudreau, Leo H.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 80, 358455, G03F 300

Patent

active

050776061

ABSTRACT:
A color signal emphasizing/de-emphasizing method and apparatus are for outputting image data scanned from the target image in every pixel on a color print or a color display by means of three principle color signals. This method and apparatus are intended to obtain a desired hue variation or color saturation by emphasizing/de-emphasizing one of the three principle color signals. The three principle colors are classified into a primary color portion signal, a secondary color portion signal and tertiary color portion signal. These designated signals of color portions are respectively multiplied by color coefficients predetermined for each designated signal. Finally, a corrected color signal is obtained by summing up these multiplied signals in every principle color.

REFERENCES:
patent: 4314274 (1982-02-01), Atoji et al.
patent: 4335398 (1982-06-01), Yamada
patent: 4631578 (1986-12-01), Sasaki
patent: 4649423 (1987-03-01), Hoffrichter et al.
patent: 4953008 (1990-08-01), Kaye

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