| Presentation | 2010-03-09 A computational theory of horizontal connection in primary visual cortex Hiroaki SASAKI, Shunji SATOH, Shiro USUI, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | It is believed that in primary visual cortex(V1), neurons efficiently encode natural images by the sparse outputs of these neurons. However, such outputs of V1 cells are not sufficiently sparse because natural images have a spatial structure like edge and texture. Also the classical receptive fields of V1 cells are spatially overlapped. In this paper, we propose that the computational role of horizontal connection(HC) in V1 is to increase the efficiency of image coding. The estimated HC indicates a mexican hat like spatial distribution to natural images. First, we define a mathematical function evaluating the coding efficiency as a function of the HCs. Second, a HC distribution is obtained by computer simulations so that the simulated HC has a better performance for image encoding quantified by the evaluation function. We will show that a neural network model having the simulated HCs qualitatively reproduces some nonlinear properties of V1 neurons, e.g. size-tuning and contextual modulation. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | efficient coding / sparse coding / primary visual cortex / horizontal connection |
| Paper # | NC2009-88 |
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| Committee | NC |
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| Conference Date | 2010/3/2(1days) |
| Place (in Japanese) | (See Japanese page) |
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| Topics (in Japanese) | (See Japanese page) |
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| Registration To | Neurocomputing (NC) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A computational theory of horizontal connection in primary visual cortex |
| Sub Title (in English) | |
| Keyword(1) | efficient coding |
| Keyword(2) | sparse coding |
| Keyword(3) | primary visual cortex |
| Keyword(4) | horizontal connection |
| 1st Author's Name | Hiroaki SASAKI |
| 1st Author's Affiliation | Faculty of Engineering, Tohoku University:Neuroinformatics, RIKEN BSI() |
| 2nd Author's Name | Shunji SATOH |
| 2nd Author's Affiliation | Graduate School of Information Systems, The University of Electro-Communications |
| 3rd Author's Name | Shiro USUI |
| 3rd Author's Affiliation | Neuroinformatics, RIKEN BSI |
| Date | 2010-03-09 |
| Paper # | NC2009-88 |
| Volume (vol) | vol.109 |
| Number (no) | 461 |
| Page | pp.pp.- |
| #Pages | 6 |
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