Method of transforming the light-source color data and the...

Details Method of transforming the light-source color data and the... Method of transforming the light-source color data and the...

G - Physics

01

J

354/8

G01J 3/46 (2006.01)

Patent

CA 1319990

ABSTRACT OF THE DISCLOSURE Herein disclosed is a method for mutual transformation between the data of a light-source color on a color CRT monitor and the data of a non-luminous object color perceived as matching with the light-source color. The transformation can be performed by using any of the following two formulas: Rc(.lambda.) = [IC(.lambda.)/IG (.lambda.)] RG (.lambda.); and Image wherein: Both Rc(.lambda.), and X, Y and Z express the non-luminous object color data which are designated at a spectral reflectance factor and the CIE tristimulas values, respectively; and Both IC(.lambda.), and RC, GC and BC express the light-source color data, which are designated at a spectral distribution and the RGB video drive signals, respectively. Unknown parameters RG (.lambda.) and IG (.lambda.), and kR, kG and kB, which are used in the two formulas above, are determined by visual color matching under the Color Comparison Condition in which the light-source color on the color CRT monitor and the non-luminous object color are placed side by side so that they may be simultaneously observed.

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