Abstract

For background reflectances taken equal to, or slightly lower than, the specimen reflectances, the Munsell-value, V, and the CIE 1964, W*, scales are found to be essentially linear with a power formulation for lightness previously shown to accord with lightness-spacing data for a wide variety of specimen and background reflectances. Adjustments required to make the Munsell-value function accord precisely with the power formulation for this background condition are all less than 0.2 of a Munsell-value step between 1/ and 9/. The power formulation is used to construct a table to show in Munsell terms the influence of background reflectance on perceived lightness for all combinations of specimen and background reflectance including Takasaki crispening for specimen reflectance approaching that of the background.

© 1971 Optical Society of America

Automatic Photoelectric Colorimeter for Direct Reading of Munsell Coordinates

Gilbert L. Gibson and David A. Neubrech
J. Opt. Soc. Am. 44(9) 703-712 (1954)

Modification of the (U*, V*, W*) System

Masako Sato and Ryuichi Hioki
J. Opt. Soc. Am. 59(3) 349-355 (1969)

Model for Color Conversion

Whitman Richards and Edward A. Parks
J. Opt. Soc. Am. 61(7) 971-976 (1971)

Prediction of Lightness and Brightness on Different Backgrounds

Carl C. Semmelroth
J. Opt. Soc. Am. 60(12) 1685-1689 (1970)

Absolute Reflectances from Reflectometer Readings

W. F. Sullivan
Appl. Opt. 10(7) 1550-1558 (1971)