Amalgamation of the Wright and Guild Color‐mixture Data

AbstractThe mixture data for the CIE 1931 standard observer were created by amalgamating two separate sets of mixture data provided by Wright and Guild. Both sets of data were expressed in terms of the NPL system and amalgamated. It is possible to express all three sets of data in terms of Wright's system and show in terms of that system that the CIE data represent an acceptable amalgamation of the Wright and Guild data. This avoids the use of a third system for amalgamating the two sets of data. The properties of the new set of data can be defined by giving the trichromatic coefficients (chromaticity coordinates) of the spectral colors and the luminosity coefficients of the three primaries. This new amalgamated set of data can be used in connection with the V(λ) curve to derive the standard 1931 XYZ diagram and the set of x̄, ȳ, and z̄ values for use in photometry and colorimetry.