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Proc Natl Acad Sci U S A. 2012 Apr 17;109(16):6313-8. doi: 10.1073/pnas.1200125109. Epub 2012 Apr 2.

Relative luminance and binocular disparity preferences are correlated in macaque primary visual cortex, matching natural scene statistics.

Author information

1
Center for the Neural Basis of Cognition and Computer Science Department, Carnegie Mellon University, Pittsburgh, PA 15213, USA. samondjm@cnbc.cmu.edu

Abstract

Humans excel at inferring information about 3D scenes from their 2D images projected on the retinas, using a wide range of depth cues. One example of such inference is the tendency for observers to perceive lighter image regions as closer. This psychophysical behavior could have an ecological basis because nearer regions tend to be lighter in natural 3D scenes. Here, we show that an analogous association exists between the relative luminance and binocular disparity preferences of neurons in macaque primary visual cortex. The joint coding of relative luminance and binocular disparity at the neuronal population level may be an integral part of the neural mechanisms for perceptual inference of depth from images.

PMID:
22474369
PMCID:
PMC3341027
DOI:
10.1073/pnas.1200125109
[Indexed for MEDLINE]
Free PMC Article

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