Conjoint Measurement of Gloss and Surface Texture

The image of a material's surface varies not only with viewing and illumination conditions, but also with the material's surface properties, including its 3-D texture and specularity. Previous studies on the visual perception of surface material have typically focused on single material pr...

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Bibliographic Details
Published in:Psychological science 2008-02, Vol.19 (2), p.196-204
Main Authors: Ho, Yun-Xian, Landy, Michael S., Maloney, Laurence T.
Format: Article
Language:English
Subjects:
Cognition
Conjoint analysis
Cues
Humans
Judgement
Judgment
Light
Luminance
Material properties
Measurement
Modeling
Models, Psychological
Object
Optical reflection
Parametric models
Property
Reflectance
Scale analysis
Spatial analysis
Specular reflection
Surface properties
Surface roughness
Surface texture
Texture
Visual Perception
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Summary:The image of a material's surface varies not only with viewing and illumination conditions, but also with the material's surface properties, including its 3-D texture and specularity. Previous studies on the visual perception of surface material have typically focused on single material properties, ignoring possible interactions. In this study, we used a conjoint-measurement design to determine how observers represent perceived 3-D texture ("bumpiness") and specularity ("glossiness") and modeled how each of these two surface-material properties affects perception of the other. Observers made judgments of bumpiness and glossiness of surfaces that varied in both surface texture and specularity. We quantified how changes in each surface-material property affected judgments of the other and found that a simple additive model captured visual perception of texture and specularity and their interaction. Conjoint measurement is potentially a powerful tool for analyzing perception of surface material in realistic environments.
ISSN:0956-7976
1467-9280
DOI:10.1111/j.1467-9280.2008.02067.x