Vertical-disparity gradients are processed independently in different depth planes

We examined the effects of vertical-disparity gradients on apparent depth curvature of textured surfaces. In Experiment 1, vertical disparities induced expected curvatures when the surface had a horizontal disparity of < ±40.34′. A central row of elements, lacking vertical disparities, ceased to...

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Bibliographic Details
Published in:Vision research (Oxford) 2005-07, Vol.45 (15), p.2025-2035
Main Authors: Duke, Philip A., Howard, Ian P.
Format: Article
Language:English
Subjects:
Adult
Aged
Biological and medical sciences
Cues
Curvature perception
Distance Perception - physiology
Fundamental and applied biological sciences. Psychology
Humans
Middle Aged
Pattern Recognition, Visual - physiology
Perception
Photic Stimulation - methods
Psychology. Psychoanalysis. Psychiatry
Psychology. Psychophysiology
Psychophysics
Stereopsis
Vertical disparity
Vision
Vision Disparity - physiology
Vision, Binocular - physiology
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Summary:We examined the effects of vertical-disparity gradients on apparent depth curvature of textured surfaces. In Experiment 1, vertical disparities induced expected curvatures when the surface had a horizontal disparity of < ±40.34′. A central row of elements, lacking vertical disparities, ceased to have the same apparent curvature as the surface when the horizontal disparity between row and surface exceeded ±5′. In Experiment 2, vertical disparities were not pooled between superimposed surfaces separated by horizontal disparities > ±10′. Thus, vertical-disparity gradients are not pooled over depth for curvature perception. Our results suggest that vertical disparities are used to determine distances to surfaces directly, rather than to estimate vergence.
ISSN:0042-6989
1878-5646
DOI:10.1016/j.visres.2005.01.027