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Characterization of Anisotropic Leaky Mode Modulators for Holovideo
Published on: March 19, 2016
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An expansive, cone-specific nonlinearity enabling the luminance motion system to process color-defined motion
Rémy Allard1, Jocelyn Faubert1
1Visual Psychophysics and Perception Laboratory, Université de Montréal, Montréal, Québec, Canada.
Journal of Vision
|July 5, 2014
Summary
A novel expansive nonlinearity before ganglion cells enables the luminance motion system to process color motion. This finding challenges the existence of a dedicated color motion system.
Area of Science:
- Vision science
- Neuroscience
- Perception
Background:
- The existence of a dedicated color motion system is debated.
- Previous research suggested color motion is processed separately from luminance motion.
Purpose of the Study:
- To investigate the interaction between luminance and color motion processing.
- To identify nonlinearities that could explain color motion perception.
Main Methods:
- Examined the effect of phase differences between luminance and color modulations on motion perception.
- Investigated luminance-color interactions with spatially interleaved stimuli.
Main Results:
- Color motion contribution varied with the phase difference between luminance and color modulations.
- A luminance-color phase interaction was observed after spatial integration.
- This interaction is unexplained by previously considered nonlinearities.
Conclusions:
- A novel expansive nonlinearity, occurring before ganglion cells and after spatial integration, explains color motion processing by the luminance system.
- This suggests the luminance motion pathway contributes to color motion perception.
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