Effects of illuminant spectra on desktop color reproduction

Douglas Walker; Scott Gregory

doi:10.1117/12.149057

4 August 1993 Effects of illuminant spectra on desktop color reproduction

Douglas Walker, Scott Gregory

Proceedings Volume 1909, Device-Independent Color Imaging and Imaging Systems Integration; (1993) https://doi.org/10.1117/12.149057
Event: IS&T/SPIE's Symposium on Electronic Imaging: Science and Technology, 1993, San Jose, CA, United States

Abstract

With the advent of color management systems, and other methods of controlling the color reproduction of computer systems and their imaging peripherals, the use of colorimetric techniques to encode color information is gaining prominence. The calculation of colorimetric quantities to describe reflective materials always involves the use of an illuminant spectrum. This paper examines how the results of these calculations differ as the illuminant is changed from the standard CIE D₅₀ daylight spectrum to a more realistic fluorescent viewing booth lamp intended to simulate D₅₀. Color difference formulae are used to quantify the difference for a wide variety of color printing devices. In the case of certain colors, differences of greater than 6 (Delta) E*_ab units are found for virtually all of the devices considered. The interaction of the illuminant spectra with the spectral reflectance of printer colorants is analyzed in some detail. Also, a method is presented which allows for the device specific transformation of colorimetric variables appropriate for one of the illuminants into those appropriate for another illuminant. Finally, recommendations are made concerning the standardization of practical D₅₀ illuminants and their importance to the digital communication of color images.

Citation Download Citation

Douglas Walker and Scott Gregory "Effects of illuminant spectra on desktop color reproduction", Proc. SPIE 1909, Device-Independent Color Imaging and Imaging Systems Integration, (4 August 1993); https://doi.org/10.1117/12.149057

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