Whiteness (colorimetry)
In colorimetry, whiteness is the degree to which a surface is white. An example of its use might be to quantitatively compare two pieces of paper which appear white viewed individually, but not when juxtaposed.
The International Commission on Illumination describes it in the following terms:
Calculation
where- is the Y tristimulus value,
- is the chromaticity coordinate in the CIE 1931 color space
- is the chromaticity coordinate of the perfect diffuser