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- Title
Release from Cross-Orientation Suppression Facilitates 3D Shape Perception.
- Authors
Li, Andrea; Zaidi, Qasim
- Abstract
Cross-orientation suppression (COS) in striate cortex has been implicated in the efficient encoding of visual stimuli. We show that release from COS facilitates the decoding of 3-D shape. In planar surfaces overlaid with textures, slanting the surface can increase the visibility of the component parallel to the slant. Since this component provides the orientation flows that signify 3-D shape, the enhancement of visibility facilitates 3-D slant perception. Contrast thresholds reveal that this enhancement results from a decrease in COS when 3-D slant creates a frequency mismatch between texture components. We show that coupling compressive nonlinearities in LGN neurons with expansive nonlinearities in cortical neurons can model the frequency-specific component of suppression.
- Subjects
VISUAL cortex; VISUAL learning; THREE-dimensional imaging; NONSENSE suppression (Genetics); NONLINEAR theories; BIOLOGICAL neural networks
- Publication
PLoS ONE, 2009, Vol 4, Issue 12, p1
- ISSN
1932-6203
- Publication type
Article
- DOI
10.1371/journal.pone.0008333