Effects of changing viewing conditions on the perceived structure of smoothly curved surfaces

James T. Todd, Jan J. Koenderink, Andrea J. van Doorn, Astrid M.L. Kappers

Research output: Contribution to journalArticleAcademicpeer-review

46 Citations (Scopus)

Abstract

Observers' perceptions of a male and a female torso were investigated using monocular and stereoscopic images under varying conditions of illumination. Observers judged the shapes of these torsos by adjusting a gauge figure to estimate the local slant and tilt at numerous probe points arranged in a lattice over the torso's surface. The results revealed that the judged surfaces in the monocular and stereoscopic conditions were related by an affine stretching transformation in depth that accounted for approximately 95% of the between-condition variance. There was also a strong affine component between the judgments obtained for the different illumination directions, although a further analysis of the residuals indicated that changing the direction of illumination influenced perceived structure in a piecewise manner.

Original languageEnglish
Pages (from-to)695-706
Number of pages12
JournalJournal of Experimental Psychology. Human Perception and Performance
Volume22
Issue number3
DOIs
Publication statusPublished - 1 Jan 1996
Externally publishedYes

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