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Proceedings Paper

Leonardo 2000: the softcopy screen book
Author(s): Michael H. Brill; Hugh S. Fairman; Henry Hemmendinger; Jack Ladson
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Paper Abstract

As part of a larger project that is intended for self-taught color science, we developed a software tool to provide a softcopy simulation of the Munsell Book of Color under varied illuminants and for various observers. This simulation avoids setting up as ideal a particular set of pigments from which to derive spectral reflectances. The color-order database contains a reflectance function for each Munsell aim point. The aim points are the usual ones for Illuminant C and 2° Observer function. For a new illuminant and observer, each reflectance funtion is weighted by appropriate color-matching function and illuminant spectral power distribution, and integrated to produced new X, Y, and Z values. From these values, CIELAB and chromaticity coordinates are computed. Having specified atlast colors in a variety of coordinates, the program next renders them on screen as a color-navigation tool. To illustrate good practice in constructing an atlas of reflectances, the reflectance spectra from a linear series of aim points in Munsell space can be co-plotted to show the requirements for consistency of the series under illuminant and observer change.

Paper Details

Date Published: 6 June 2002
PDF: 4 pages
Proc. SPIE 4421, 9th Congress of the International Colour Association, (6 June 2002); doi: 10.1117/12.464686
Show Author Affiliations
Michael H. Brill, Sarnoff Corp. (United States)
Hugh S. Fairman, Resource III, Inc. (United States)
Henry Hemmendinger, Hemmendinger Color Labs. (United States)
Jack Ladson, Color Innovation, LLC (United States)

Published in SPIE Proceedings Vol. 4421:
9th Congress of the International Colour Association
Robert Chung; Allan Rodrigues, Editor(s)

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