Abstract
The difference between the way in which binocular disparity scales with viewing distance and the way in which motion parallax scales with viewing distance introduces a potential indirect cue for viewing distance: the viewing distance is the only distance at which disparity and motion specify the same depth. The present study examines whether this information is used. Two simulated ellipsoids were presented on a computer screen in complete darkness. The two ellipsoids were 6°to the left and right of straight ahead. Subjects set the width and depth of each ellipsoid to match a tennis ball, and set the distance of the one on the right to half that of the one on the left. The distance of the left ellipsoid varied between trials. On half of the trials it was static. On the other half it was rotating up and down around its frontal horizontal axis. Rotating the left ellipsoid influenced its set depth: rotating ellipsoids were set to be much more spherical. There was no influence on the set depth of the other ellipsoid, or on the set width of either. The set distance of the right ellipsoid was also unaffected. We conclude that subjects do not combine binocular disparity and motion parallax to obtain more veridical information about viewing distance. Copyright (C) 1999 Elsevier Science Ltd.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 3834-3848 |
| Number of pages | 15 |
| Journal | Vision Research |
| Volume | 39 |
| Issue number | 23 |
| DOIs | |
| State | Published - Nov 1999 |
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Keywords
- Cue interaction
- Depth
- Motion parallax
- Stereopsis
ASJC Scopus subject areas
- Ophthalmology
- Sensory Systems
Cite this
Interaction between the perceived shape of two objects. / Brenner, Eli; Landy, Michael.
In: Vision Research, Vol. 39, No. 23, 11.1999, p. 3834-3848.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Interaction between the perceived shape of two objects
AU - Brenner, Eli
AU - Landy, Michael
PY - 1999/11
Y1 - 1999/11
N2 - The difference between the way in which binocular disparity scales with viewing distance and the way in which motion parallax scales with viewing distance introduces a potential indirect cue for viewing distance: the viewing distance is the only distance at which disparity and motion specify the same depth. The present study examines whether this information is used. Two simulated ellipsoids were presented on a computer screen in complete darkness. The two ellipsoids were 6°to the left and right of straight ahead. Subjects set the width and depth of each ellipsoid to match a tennis ball, and set the distance of the one on the right to half that of the one on the left. The distance of the left ellipsoid varied between trials. On half of the trials it was static. On the other half it was rotating up and down around its frontal horizontal axis. Rotating the left ellipsoid influenced its set depth: rotating ellipsoids were set to be much more spherical. There was no influence on the set depth of the other ellipsoid, or on the set width of either. The set distance of the right ellipsoid was also unaffected. We conclude that subjects do not combine binocular disparity and motion parallax to obtain more veridical information about viewing distance. Copyright (C) 1999 Elsevier Science Ltd.
AB - The difference between the way in which binocular disparity scales with viewing distance and the way in which motion parallax scales with viewing distance introduces a potential indirect cue for viewing distance: the viewing distance is the only distance at which disparity and motion specify the same depth. The present study examines whether this information is used. Two simulated ellipsoids were presented on a computer screen in complete darkness. The two ellipsoids were 6°to the left and right of straight ahead. Subjects set the width and depth of each ellipsoid to match a tennis ball, and set the distance of the one on the right to half that of the one on the left. The distance of the left ellipsoid varied between trials. On half of the trials it was static. On the other half it was rotating up and down around its frontal horizontal axis. Rotating the left ellipsoid influenced its set depth: rotating ellipsoids were set to be much more spherical. There was no influence on the set depth of the other ellipsoid, or on the set width of either. The set distance of the right ellipsoid was also unaffected. We conclude that subjects do not combine binocular disparity and motion parallax to obtain more veridical information about viewing distance. Copyright (C) 1999 Elsevier Science Ltd.
KW - Cue interaction
KW - Depth
KW - Motion parallax
KW - Stereopsis
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UR - http://www.scopus.com/inward/citedby.url?scp=0032793741&partnerID=8YFLogxK
U2 - 10.1016/S0042-6989(99)00105-4
DO - 10.1016/S0042-6989(99)00105-4
M3 - Article
C2 - 10748919
AN - SCOPUS:0032793741
VL - 39
SP - 3834
EP - 3848
JO - Vision Research
JF - Vision Research
SN - 0042-6989
IS - 23
ER -