CIE 1931 color model

The CIE 1931 color model describes a color by three tristimulus values X, Y and Z. The color space is a three-dimensional plot of the tristimulus values X, Y and Z, but often the plot is expressed in terms of chromaticity coordinates and a chromaticity diagram. The chromaticity coordinates are derived as fractional components of the tristimulus values.

The experimental conditions for CIE 1931 color model are based on a 2 degree standard observer.

The CIE 1931 color model was enhanced to the CIE 1964 color model by a 10 degree standard observer in 1964.

References

SEII EM-MI - The theory of color

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