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Color representation and interpretation of special effect coatings

AuthorsFerrero, Alejandro ; Perales, E.; Rabal, Ana M.; Campos Acosta, Joaquín ; Martínez-Verdú, F.M.; Chorro, Elizabet; Pons Aglio, Alicia
Issue Date2014
PublisherOptical Society of America
CitationJournal of the Optical Society of America A: Optics and Image Science, and Vision 31: 436- 447 (2014)
AbstractA 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.
Description12 pags.; 11 figs.; 3 tabs.; OCIS codes: (330.1710) Color, measurement; (330.1720) Color vision; (290.1483) BSDF, BRDF, and BTDF.
Identifiersdoi: 10.1364/JOSAA.31.000436
issn: 1084-7529
Appears in Collections:(CFMAC-IO) Artículos
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