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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics


  • Editors: Andrew Dunn and Anthony Durkin
  • Vol. 9, Iss. 4 — Apr. 1, 2014

Color representation and interpretation of special effect coatings

A. Ferrero, E. Perales, A. M. Rabal, J. Campos, F. M. Martínez-Verdú, E. Chorro, and A. Pons  »View Author Affiliations

JOSA A, Vol. 31, Issue 2, pp. 436-447 (2014)

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A representation of the color gamut of special effect coatings is proposed and shown for six different samples, whose colors were calculated from spectral bidirectional reflectance distribution function (BRDF) measurements at different geometries. The most important characteristic of the proposed representation is that it allows a straightforward understanding of the color shift to be done both in terms of conventional irradiation and viewing angles and in terms of flake-based parameters. A different line was proposed to assess the color shift of special effect coatings on a*,b*-diagrams: the absorption line. Similar to interference and aspecular lines (constant aspecular and irradiation angles, respectively), an absorption line is the locus of calculated color coordinates from measurement geometries with a fixed bistatic angle. The advantages of using the absorption lines to characterize the contributions to the spectral BRDF of the scattering at the absorption pigments and the reflection at interference pigments for different geometries are shown.

© 2014 Optical Society of America

OCIS Codes
(330.1710) Vision, color, and visual optics : Color, measurement
(330.1720) Vision, color, and visual optics : Color vision
(290.1483) Scattering : BSDF, BRDF, and BTDF

ToC Category:
Vision, Color, and Visual Optics

Original Manuscript: July 31, 2013
Revised Manuscript: November 8, 2013
Manuscript Accepted: December 13, 2013
Published: January 31, 2014

Virtual Issues
Vol. 9, Iss. 4 Virtual Journal for Biomedical Optics

A. Ferrero, E. Perales, A. M. Rabal, J. Campos, F. M. Martínez-Verdú, E. Chorro, and A. Pons, "Color representation and interpretation of special effect coatings," J. Opt. Soc. Am. A 31, 436-447 (2014)

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