The tristimulus values are, and the chromaticity coordinates using the standard observer are.
2.
Two lights with the same spectral power distribution, but different luminance, will have identical chromaticity coordinates.
3.
First, a factor representing the Helmholtz-Kohlrausch effect must be calculated from the x and y chromaticity coordinates:
4.
R, g, and b chromaticity coordinates are ratios of the one tristimulus value over the sum of all three tristimulus values.
5.
For other sets of primary chromaticities ( defined by their x and y chromaticity coordinates ), different linear coefficients are needed to get relative luminance.
6.
Computation of the CCT T c corresponding to the chromaticity coordinate \ scriptstyle ( u _ T, v _ T ) in the CIE 1960 UCS.
7.
A colorimeter with the known value of absolute error allows to measure ( x, y )-chromaticity coordinates in red, green, blue and white colors.
8.
To make matters worse, an engineer had made an error when copying the red primary chromaticity coordinates, resulting in an even more inaccurate representation of the SMPTE standard.
9.
CIE chromaticity coordinates and luminosity can then be calculated, providing a complete description of the source s color, including chromaticity, spectral power, illuminance, and luminance.
10.
Objects which have the same chromaticity coordinates as the white object usually appear neutral, or fairly so, and normalizing in this fashion ensures that their coordinates lie at the origin.
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