Abstract

The (U*, V*, W*) system has been checked against the Munsell renotation system on the assumption that the latter provides an equispaced visual scale. As the result of the examination, it has been found that the formula for lightness index is in excellent agreement with the Munsell value function, in spite of its numerically simplified form and that the value effect appearing on the CIE 1960 UCS diagram is over corrected by making the chromaticness indexes depend upon the first power of W*. Twenty five times the 56-power of W* has been found to be more suitable for the weighting factors to be applied to the chromaticness indices. The value effect has been reduced to about 45% by the use of the modified chromaticness indices. On the basis of the modified system, a formula is proposed for computation of color differences for pairs of similar colors. In addition, a formula is proposed for specifying whiteness for practical purposes, based on the modified system.

© 1969 Optical Society of America

Full Article  |  PDF Article
Related Articles
Physiological Optics at the National Bureau of Standards

Deane B. Judd
Appl. Opt. 6(1) 13-26 (1967)

Attributive Limens in Selected Regions of the Munsell Color Solid

Blanche R. Bellamy and Sidney M. Newhall
J. Opt. Soc. Am. 32(8) 465-473 (1942)

Comparison of Color Systems with Respect to Uniform Visual Spacing

Robert W. Burnham
J. Opt. Soc. Am. 39(5) 387-392 (1949)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (11)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (13)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription