Y. Zhang, P.H. Schiller, V.S. Weiner
and W.M. Slocum, 2005
Vision Sci Soc Abstr., 407a
Abstract
This study compared the effectiveness of binocular disparity and shading cues
for the perception of depth in humans and monkeys. Using a novel display, we
presented shading and disparity cues conjointly, separately, and in conflict
with each other in an oddities depth discrimination task. An example of the
figures used in the display can be viewed in the form of an autostereogram at
http://web.mit.edu.ezproxyberklee.flo.org/bcs/schillerlab/vss05abstract.htm. The following is a summary
of our findings:
1. Both shading and disparity cues are effectively utilized for the perception
of depth by humans as well as by monkeys.
2. Depth information can be processed very rapidly when shading and disparity
cues are provided conjointly. When presented singly, the processing of disparity
cues takes significantly longer than the processing of shading cues.
3. By placing shading and disparity cues in conflict with each other we assessed
their relative effectiveness. Processing times were significantly increased
under conflict conditions suggesting that normally these cues are co-processed.
Similar values were obtained in humans and monkeys.
4. Control conditions for shading included the rotation of the display by 90
degrees thereby reducing the effectiveness of differential luminance values
as a depth cue. Performance under these conditions became significantly worse
and reaction times were increased.
Citation: Zhang, Y., Schiller, P. H., Weiner, V. S., & Slocum, W. M. (2005). Depth from shading and disparity in humans and monkeys [Abstract]. Journal of Vision, 5(8):407, 407a, http://journalofvision.org/5/8/407/, doi:10.1167/5.8.407.