Open AccessPreliminary measurement scales for sparkle and graininess
Author(s) -
Alejandro Ferrero,
Esther Perales,
Nina Basic,
Marcel Pastuschek,
G. Porrovecchio,
A. Schirmacher,
Jesús Velázquez,
J. Campos,
Francisco M. MartínezVerdú,
Marek Šmíd,
Petr Linduška,
Thomas Dauser,
Peter Blattner
Publication year - 2021
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.411953
Subject(s) - metrology , standardization , optics , computer science , physics , operating system
Large effect pigments, widely used in various fields of industrial applications, produce characteristic visual textures known as sparkle and graininess, which need to be quantified by objective or subjective methods. The development of preliminary measurement scales for sparkle and graininess, whose recommendation is now under discussion in the International Commission on Illumination (CIE), is described in this article. These scales are absolute, linear and traceable to standards of optical radiation metrology. The main purpose of this article is to justify the convenience of adopting these preliminary measurements scales, showing clear evidence that they correlate well with subjective evaluations. Before standardization, these scales need to be validated with more experimental data, including different specimens and experimental systems from other research groups.