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Olkkonen M, Brainard DH. Joint effects of illumination geometry and object shape in the perception of surface reflectance. Iperception. 2011;2(9):1014-34doi: 10.1068/i0480.
Olkkonen, M., & Brainard, D. H. (2011). Joint effects of illumination geometry and object shape in the perception of surface reflectance. i-Perception, 2(9), 1014-34. https://doi.org/10.1068/i0480
Olkkonen, Maria, and Brainard, David H. "Joint effects of illumination geometry and object shape in the perception of surface reflectance." i-Perception vol. 2,9 (2011): 1014-34. doi: https://doi.org/10.1068/i0480
Olkkonen M, Brainard DH. Joint effects of illumination geometry and object shape in the perception of surface reflectance. Iperception. 2011;2(9):1014-34. doi: 10.1068/i0480. Epub 2011 Dec 14. PMID: 23145259; PMCID: PMC3485792.
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Iperception. 2011;2(9):1014-34. doi: 10.1068/i0480. Epub 2011 Dec 14.

Joint effects of illumination geometry and object shape in the perception of surface reflectance.

i-Perception

Maria Olkkonen, David H Brainard

Affiliations

  1. Department of Psychology, University of Pennsylvania, 3401 Walnut St, Philadelphia, PA 19104, USA; e-mail: [email protected] ;

PMID: 23145259 PMCID: PMC3485792 DOI: 10.1068/i0480

Abstract

Surface properties provide useful information for identifying objects and interacting with them. Effective utilization of this information, however, requires that the perception of object surface properties be relatively constant across changes in illumination and changes in object shape. Such constancy has been studied separately for changes in these factors. Here we ask whether the separate study of the illumination and shape effects is sufficient, by testing whether joint effects of illumination and shape changes can be predicted from the individual effects in a straightforward manner. We found large interactions between illumination and object shape in their effects on perceived glossiness. In addition, analysis of luminance histogram statistics could not account for the interactions.

Keywords: conjoint measurement; illumination; luminance histogram statistics; material perception; perceptual constancy; shape; surface reflectance; vision

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