Dmax for stereopsis depends on size, not spatial frequency content

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Dmax for stereopsis depends on size, not spatial frequency content

Stereoacuity depends not only on the carrier frequency of Gabor stimuli, but also upon their size. To determine if this is also the case at large disparities, we have measured the upper limit for stereopsis, "Dmax", and assessed its dependence on carrier frequency and overall envelope size. The results differ markedly from the stereoacuity data. Dmax for stereopsis is primarily dependent on the...

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The Spatial Limit for Motion Detection in Noise Depends on Element Size, not on Spatial Frequency

When a random spatial noise pattern is displaced for a short distance it seems to move coherently, but when the displacement exceeds a certain value, the direction of motion cannot be clearly perceived. We measured the displacement limit (Dmax) for a two-frame sequence and found that it depended on the size of the elements comprising the random pattern, even when low spatial frequencies were re...

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Stereopsis from Interocular Spatial Frequency Differences is Not Robust

Based on data obtained using one-dimensional noise patterns, Tyler & Sutter (1979). (Vision Research, 19, 859-865) concluded that stereoscopic tilt can result from an interocular spatial frequency difference in the absence of consistent horizontal disparity. We tested stereopsis using two-dimensional random-dot patterns that were bandpass filtered to contain 1.0 octave bands of spatial frequenc...

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dmax for stereopsis and motion in random dot displays

The upper displacement limit for motion was compared with the upper disparity limit for stereopsis using two-frame random dot kinematograms or briefly presented stereograms. dmax (the disparity/displacement at which subjects make 20% errors in a forced-choice paradigm) was found to be very similar for motion and stereo at all dot densities, and to fall with increasing dot density (0.006% or two...

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Stereopsis, spatial frequency and retinal eccentricity

Stereoscopic depth discrimination thresholds increase with retinal eccentricity and distance from the horopter. However, in contrast to spatial resolution, the effects of spatial frequency on stereo-thresholds in the periphery are unknown. For spatial vision, it is generally assumed that the retina is comprised of a series of overlapping spatial filter mechanisms and that there is a commensurat...

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ژورنال

عنوان ژورنال: Vision Research

سال: 1995

ISSN: 0042-6989

DOI: 10.1016/0042-6989(94)00199-v