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tristimulus values

   Also found in: Encyclopedia 0.01 sec.
tristimulus values [traɪˈstɪmjʊləs]
pl n
(Fine Arts & Visual Arts / Colours) three values that together are used to describe a colour and are the amounts of three reference colours that can be mixed to give the same visual sensation as the colour considered. Symbol X, Y, Z See also chromaticity coordinates


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While the x, y and z tristimulus values are useful for defining color, they do not allow for easy visualization of color.
Additional discussion of CIELAB values from XYZ tristimulus values determination can be found in reference 19.
The tristimulus values X, Y, Z are calculated by combining the spectral power distribution D([lambda]) of the illuminant, the reflectance R([lambda]) of the object and the observer color matching functions [~.
 
 
 
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