Color expressing method, color image reading apparatus and color

Details Color expressing method, color image reading apparatus and color Color expressing method, color image reading apparatus and color

1992-07-07

1995-06-06

Coles, Sr., Edward L.

Facsimile and static presentation processing

Natural color facsimile

Color correction

358509, 358528, 358529, 358512, H04N 146

Patent

active

054227399

ABSTRACT:
A color image reading system in which an input color image signal is converted into color data signals. The color data signals are indicative of a combination of data of reference stimuli represented by vertices of a triangle of which one side circumscribes a pure purple locus, and of which the remaining two sides circumscribes two points of a spectral locus of a color degree diagram, the two points representing substantially middle colors between a color represented by one vertex of the triangle at which the remaining two sides intersect and each of two colors represented by the remaining two sides of the triangle, respectively. The input color image signal is reproduced on a color image output device in response to the provision of the color data signals.

REFERENCES:
patent: 4409614 (1983-10-01), Eichler et al.
patent: 4769718 (1988-09-01), Imamura
patent: 4965663 (1990-10-01), Sasaki
patent: 5126838 (1992-06-01), Ohsawa
patent: 5299291 (1994-03-01), Ruetz
"The Color Space For Color Communication Among Different Kinds of Apparatuses", Image Technology Center, Canon, Inc., Apr. 10, 1992.

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