Predictions based on Munsell notation. II. Principal hue components

✍ Scribed by Tarow Indow

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 558 KB
• Volume: 24
• Category: Article
• ISSN: 0361-2317
• DOI: 10.1002/(sici)1520-6378(199902)24:1<19::aid-col6>3.0.co;2-n

✦ Synopsis

With Munsell colors j, observers made assessments on the degree of grayness N(j), 0ϳ10, and the degrees of principal hues ␣ (j) in the chromatic part (j) ϭ 10 Ϫ N(j). Based on these data, the optimum directions of principal hue vectors {f ␣ }, common for colors from 4ϳ7V, were determined, where ␣ means 4 (R, Y, G, B) or 5 (R, Y, G, B, P). Coordinates ˆ␣ of points (H, V/C) on these vectors and ratios ␣ ϭ ␣ / are called the absolute and relative principal hue components. These values, ␣ (j), (j), and ␣ (j), provide the foundation for denoting a color j by (H j , V j /C j ). Curves representing ␣ (H͉V, C) or ␣ (H͉V, C) as functions of Munsell H with fixed levels of V and C are compared with chromatic response functions on the equalenergy spectrum. Of the five Munsell principal hues, Purple was shown not indispensable. The most representative blue was found not at 5B, but close to 5PB in both 4-and 5-Hue assessments. It was discussed how to predict assessments ␣ from ˆ␣ and from Munsell Chroma, and ␣ by an appropriate combination of ˆ␣ and .