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Tomohisa Matsumoto, Kazuho Fukuda, Keiji Uchikawa; Appearance of ‘gold’ affects glossiness and metallicity of a surface. Journal of Vision 2015;15(12):819. doi: 10.1167/15.12.819.
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© ARVO (1962-2015); The Authors (2016-present)
It is known that glossiness of a surface is affected by various factors, i.e., illumination, shape, image statistics, highlight of a surface. However, it has not been fully studied whether glossiness is affected by chromaticity of a surface. Metallicity, on the other hand, is one of material perceptions similar to glossiness, but we do not know yet what determining factors, including chromaticity, to perceive metallicity. Matsumoto et al. showed that gold is perceived on a glossy surface of certain chromaticities, and that metallicity closely related to goldenness (Matsumoto et al., APCV 2011, VSS 2014). In the present study, we investigated effects of chromaticity on goldenness, glossiness and metallicity of a surface to clarify relationships between color appearance, glossiness and metallicity. We used metallic and non-metallic spheres with 3D-CG as test stimuli with 36 chromaticities. All pixels of a stimulus had the same chromaticity. Luminance of each pixel in metallic and non-metallic stimuli was morphed to make test stimuli with 5 different levels of contrast gloss. The observer performed magnitude estimation of goldenness, glossiness and metallicity of the stimulus. It was found that the stimuli with chromaticities that yield strong appearance of ‘gold’ tend to have higher glossiness and metallicity than those with other chromaticities when the stimuli were of medium contrast gloss. Such effects of chromaticity on perceived glossiness and metallicity were not observed for the stimuli of high contrast gloss. These results suggest that gold appearance per se might enhance glossiness and metallicity of a surface.
Meeting abstract presented at VSS 2015
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