Effects of generalized pooling on binocular disparity selectivity of neurons in the early visual cortex
| Autor: | Kota S. Sasaki, Izumi Ohzawa, Daisuke Kato, Mika Baba |
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| Rok vydání: | 2016 |
| Předmět: |
Male
0301 basic medicine Vision Disparity genetic structures Computer science Pooling Models Biological General Biochemistry Genetics and Molecular Biology 03 medical and health sciences 0302 clinical medicine medicine Animals Binocular neurons Neurons Vision Binocular business.industry Pattern recognition Articles 030104 developmental biology Stereopsis Visual cortex medicine.anatomical_structure Receptive field Cats Binocular disparity Female Spatial frequency Artificial intelligence General Agricultural and Biological Sciences business Binocular vision 030217 neurology & neurosurgery |
| Zdroj: | Philosophical Transactions of the Royal Society B: Biological Sciences. 371:20150266 |
| ISSN: | 1471-2970 0962-8436 |
| DOI: | 10.1098/rstb.2015.0266 |
| Popis: | The key problem of stereoscopic vision is traditionally defined as accurately finding the positional shifts of corresponding object features between left and right images. Here, we demonstrate that the problem must be considered in a four-dimensional parameter space; with respect not only to shifts in space ( X , Y ), but also spatial frequency (SF) and orientation (OR). The proposed model sums outputs of binocular energy units linearly over the multi-dimensional V1 parameter space ( X , Y , SF, OR). Theoretical analyses and physiological experiments show that many binocular neurons achieve sharp binocular tuning properties by pooling the output of multiple neurons with relatively broad tuning. Pooling in the space domain sharpens disparity-selective responses in the SF domain so that the responses to combinations of unmatched left–right SFs are attenuated. Conversely, pooling in the SF domain sharpens disparity selectivity in the space domain, reducing the possibility of false matches. Analogous effects are observed for the OR domain in that the spatial pooling sharpens the binocular tuning in the OR domain. Such neurons become selective to relative OR disparity. Therefore, pooling allows the visual system to refine binocular information into a form more desirable for stereopsis. This article is part of the themed issue ‘Vision in our three-dimensional world’. |
| Databáze: | OpenAIRE |
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