Hue compensation apparatus for a color hard copy machine

Details Hue compensation apparatus for a color hard copy machine Hue compensation apparatus for a color hard copy machine

1993-04-19

1994-05-17

Coles, Sr., Edward L.

Facsimile and static presentation processing

Natural color facsimile

358518, 358520, 358522, H04N 146

Patent

active

053132904

ABSTRACT:
A hue compensation apparatus outputs hue-compensated data of a color designated by an input color selection signal of red, green and blue, responsive to red, green and blue input signals. The hue compensation apparatus uses first, second and third lookup table circuits, a decoder, a polarizing circuit and a synthesizing circuit. The lookup table circuits output hue-compensated red, green and blue signals in response to input red, green and blue signals, respectively. The decoder decodes the input color selection signal, and the polarization circuit polarizes outputs from the first, second and third lookup table circuits according to an output of the decoder. The synthesizing circuit synthesizes the polarized output from the first, second and third lookup table circuits. The synthesizing circuit thus outputs a hue-compensated color signal whose color is designated by the color selection signal by synthesizing the polarized outputs from the polarization circuit.

REFERENCES:
patent: 4819193 (1989-04-01), Imao

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