Stereo dynamics are not scale-dependent

The experiments reported here focus on the temporal dynamics of stereopsis in an effort to shed light on how low level mechanisms might contribute to the execution of coarse-to-fine processing in the human stereo system. Because previous studies have used a variety of stimuli and configurations, we...

Full description

Saved in:
Bibliographic Details
Published in:Vision research (Oxford) 2006-06, Vol.46 (12), p.1911-1923
Main Authors: Hess, Robert F., Wilcox, Laurie M.
Format: Article
Language:English
Subjects:
Biological and medical sciences
Contrast Sensitivity
Depth Perception - physiology
Dynamics
Fundamental and applied biological sciences. Psychology
Humans
Models, Neurological
Models, Psychological
Perception
Photic Stimulation - methods
Psychology. Psychoanalysis. Psychiatry
Psychology. Psychophysiology
Psychophysics
Sensory Thresholds - physiology
Spatial frequency
Spatial properties
Stereopsis
Time Factors
Vision
Vision Disparity
Vision, Binocular
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The experiments reported here focus on the temporal dynamics of stereopsis in an effort to shed light on how low level mechanisms might contribute to the execution of coarse-to-fine processing in the human stereo system. Because previous studies have used a variety of stimuli and configurations, we assess the effect of exposure duration on stereo thresholds using band-limited Gabor patches for a range of stimulus configurations. In preliminary studies, we found that the best stereo sensitivity–spatial frequency relationship was obtained when using configurations in which the size and target–reference spacing were consistent with spatially scaled stimuli. Sub-optimal stereo sensitivity as a function of spatial frequency was observed when the size and separation were fixed. Further, we found that the temporal properties of stereopsis were consistently sustained in nature irrespective of the stimulus spatial frequency content. This latter finding suggests that if coarse-to-fine stereo processing does occur it does not follow as a consequence of the dynamics of low-level disparity transduction.
ISSN:0042-6989
1878-5646
DOI:10.1016/j.visres.2005.12.007