Effects of Shape, Roughness and Gloss on the Perceived Reflectance of Colored Surfaces

Frontiers in Psychology

article

Vanessa Honson¹  Quan Huynh-Thu²  Matthew Arnison²  David Monaghan²  Zoey J. Isherwood¹  Juno Kim¹ 

[1] Sensory Processes Research Laboratory, School of Optometry and Vision Science, University of New South Wales;Canon Information Systems Research Australia (CiSRA);Nearmap;Bandicoot Imaging Sciences;School of Psychology, University of Wollongong

关键词: material appearance;    surface properties;    gloss;    lightness;    color;    3D shape;    virtual reality;   

DOI  :  10.3389/fpsyg.2020.00485

学科分类：社会科学、人文和艺术（综合）

来源: Frontiers

【 摘 要 】

This study examined perceptual differentiation of specular from diffuse shading for the recovery of surface color and gloss. In Experiment 1, we parametrically varied the mesoscale relief height of globally planar surfaces, specular sharpness and the orientation of the surface relative to the light source. We obtained psychophysical matches for perceived color saturation and value (HSV), but also considered whether the main effects could be influenced by color space used when transforming data to perceptually-uniform CIE LCH space. Results revealed strong interactions between perceived color attributes and the lighting conditions, the structure of specular reflections, and surface relief. Declines in saturation were observed with increasing specular roughness (using an HSV color representation), but no similar decline was observed in chroma (using a CIE LCH color representation). Experiment 2 found strong negative correlations between perceived gloss and specular roughness. Perceived gloss also depended on mesoscopic relief height and orientation of the surface relative to the light source. Declines in perceived gloss moderately accounted for the variability in color saturation and value matches obtained in Experiment 1. We found information about perceived specular coverage could further improve the model’s accountability of perceived color saturation and lightness (Experiment 3). These findings together suggest that perceived color saturation and color value depends on the visual system’s ability to distinguish the underlying diffuse shading from specular highlights in images.

【 授权许可】

CC BY