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Color shifts from S-cone patterned backgrounds: contrast sensitivity and spatial frequency selectivity.
Steven K Shevell1, Patrick Monnier
1Department of Psychology, University of Chicago, 940 East 57th Street, Chicago, IL 60637, USA. shevell@uchicago.edu
Vision Research
|February 15, 2005
Summary
Stimulating specific cone cells (S-cones) in the eye causes noticeable color shifts. These shifts are proportional to S-cone contrast and are strongest at intermediate spatial frequencies, supporting an S-cone receptive field model.
Area of Science:
- Vision science
- Neuroscience
- Color perception
Background:
- Patterned backgrounds stimulating S-cones induce significant color shifts.
- These shifts have been previously attributed to an S-cone antagonistic center-surround receptive field.
Purpose of the Study:
- To investigate the proportionality of color shifts with S-cone contrast.
- To determine the spatial frequency selectivity of these color shifts.
Main Methods:
- Experimentally measuring color shifts induced by patterned backgrounds.
- Varying S-cone contrast and spatial frequency of the inducing patterns.
Main Results:
- Color shift magnitude demonstrated a linear relationship with S-cone contrast.
- Maximum color shifts occurred with inducing patterns of intermediate spatial frequency.
Conclusions:
- The results support a model of an S-cone spatially antagonistic receptive field.
- This receptive field is the neural basis for large color shifts induced by S-cone patterns.