Binocular contrast, stereopsis, and rivalry: Toward a dynamical synthesis
| Autor: | Hugh R. Wilson |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Binocular rivalry
Vision Disparity genetic structures Models Neurological Stereoscopy 050105 experimental psychology law.invention Contrast Sensitivity 03 medical and health sciences 0302 clinical medicine Optics law Humans 0501 psychology and cognitive sciences Computer vision Rivalry Depth Perception Vision Binocular Monocular business.industry Orientation (computer vision) 05 social sciences eye diseases Sensory Systems Ophthalmology Stereopsis Tilt (optics) Binocular disparity Artificial intelligence business Psychology 030217 neurology & neurosurgery |
| Zdroj: | Vision research. 140 |
| ISSN: | 1878-5646 |
| Popis: | It is well known that small orientation differences between two monocular gratings fuse to generate a stereoscopic perception of tilt, while large differences trigger binocular rivalry. In addition, unequal monocular contrasts combine nonlinearly to generate binocular contrast. A nonlinear neural model is developed here to account for binocular contrast, fusion at small orientation differences, and rivalry at large differences. The model also accounts for hysteresis in the transition between fusion and rivalry. Finally, the model predicts that interocular contrast differences between fusible gratings will produce a reduced tilt percept, and experiments reported here support this. Key to the model is the presence of two classes of inhibitory interneurons: one operating on similar orientations to normalize interocular contrast (IN), and one operating across large orientation differences to generate rivalry (IR). Critically, the IN neurons switch off the IR neurons driven by the other eye, thus permitting fusion of binocular plaids. |
| Databáze: | OpenAIRE |
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