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Article

Colour Quality Evaluation of Bluish-Green Serpentinite Based on the CIECAM16 Model

School of Gemmology, China University of Geosciences (Beijing), Beijing 100083, China
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Author to whom correspondence should be addressed.
Academic Editors: Lluís Casas and Roberta Di Febo
Minerals 2022, 12(1), 38; https://doi.org/10.3390/min12010038
Received: 13 November 2021 / Revised: 21 December 2021 / Accepted: 22 December 2021 / Published: 28 December 2021
(This article belongs to the Special Issue Colours in Minerals and Rocks)
The CIECAM16 colour appearance model is currently a model with high prediction accuracy. It can solve the problem of predicting the influence of different observation conditions on the colour of gemstones. In this study, a computer vision system (CVS) was used to measure the colour of 59 bluish-green serpentinite samples, and the tristimulus values were input into the CIECAM16 forward model to calculate the colour appearance parameters of serpentinite under different surrounds, illuminances, and light sources. It was found that the darkening of the surround causes the lightness and brightness to increase. Pearson’s r of brightness and colourfulness with illuminance is 0.885 and 0.332, respectively, which predicts the Stevens and Hunt effects. When the light source changes from D65 to A, the calculated hue angle shifts to the complementary area of the A light source, which is contrary to the CVS measurement result. The D65 light source is more suitable for the colour presentation and classification of bluish-green serpentinite. View Full-Text
Keywords: colour; CIECAM16; serpentinite; colour quality evaluation colour; CIECAM16; serpentinite; colour quality evaluation
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MDPI and ACS Style

Zhao, Z.; Guo, Y. Colour Quality Evaluation of Bluish-Green Serpentinite Based on the CIECAM16 Model. Minerals 2022, 12, 38. https://doi.org/10.3390/min12010038

AMA Style

Zhao Z, Guo Y. Colour Quality Evaluation of Bluish-Green Serpentinite Based on the CIECAM16 Model. Minerals. 2022; 12(1):38. https://doi.org/10.3390/min12010038

Chicago/Turabian Style

Zhao, Zitong, and Ying Guo. 2022. "Colour Quality Evaluation of Bluish-Green Serpentinite Based on the CIECAM16 Model" Minerals 12, no. 1: 38. https://doi.org/10.3390/min12010038

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