Optimization of the MacAdam-Modified 1965 Friele Color-Difference Formula
- 1 April 1967
- journal article
- Published by Optica Publishing Group in Journal of the Optical Society of America
- Vol. 57 (4) , 537-541
- https://doi.org/10.1364/josa.57.000537
Abstract
The adjustable parameters in a MacAdam-modified version of Friele’s 1965 proposal for calculating color differences have been optimized, according to a criterion of MacAdam, to fit PGN experimental data. The mean-square error of fitting is 0.030. The distribution of the resulting color-metric coefficients more closely approximates those of the PGN data than do previous versions of Friele’s proposals. The optimized primaries have chromaticity coordinates of x = 0.74054, y = 0.25946 for the red; x = −1.11696, y = 2.11696 for the green; and x = 0.13939, y = −0.03454 for the blue primary.Keywords
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