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Retinal speed gradients and the perception of surface slant
M Harris1, T Freeman, J Hughes
1Cognitive Science Research Centre, School of Psychology, University of Birmingham, England.
Vision Research
|March 1, 1992
Abstract:
Previous work has demonstrated a difference in human sensitivity to compressive and shearing speed gradients. This raises the possibility that the ability to estimate the slant of a surface may vary with its direction of tilt. No such variance was found here, which may indicate that slant estimation depends upon deformation rather than upon compression or shear.