A Study on Small Differences in Color (Part 2)

Effects of Munsell Chroma on Hue Discrimination Thresholds

Abstract

In order to establish the method of indicating the small difference in color, relationship between the physical measurement and visual test has already been reported partly by the authors. The effects of Munsell chroma on hue discrimination thresholds were measured by sensory test with the samples having Munsell value and chroma of 6/8, 6/4 and 6/2 respectively at different hues.
Correlation between visual assessments and the color difference equations by these samples together with that of 6/6 samples, the results of which have previously been reported, was investigated.
It has been clarified that the threshold value of the hue is affected considerably according to the differences in chroma. The Adams' color difference equation agrees most satisfactorily with the psychological values.