Because of the growing interest in uniform chromaticity scales, a comparison between the Munsell color space and a color space based on MacAdam’s visual sensitivity data is of importance. In order to make this comparison we established the CIE coordinates for a Munsell type cylindrical space sampling conforming to MacAdam’s data. In the color space so formed, a color difference of one-chroma step, for example, will be the same in any region when that difference is calculated from MacAdam’s data. This “MacAdam space” differs materially from Munsell renotation space. The distance of the constant chroma loci from neutral in the purple-blue region is approximately doubled, and the constant hue loci are shifted as much as 10 hue steps in the green and red regions.
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