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Paper Abstract and Keywords
Presentation 2009-03-19 10:40
Statistical analysis of information expression in V1 receipt field with sparseness constraint
Yoshitaka Hirose, Ko Sakai (Univ. of Tsukuba)
Abstract (in Japanese) (See Japanese page) 
(in English) We discuss the information representation in V1 neurons including their surround modulation, with specific interests on sparseness in their coding. We compared statistical indices, kurtosis and KL divergence, between the surround-modulation model and a classical receipt field (CRF) model to evaluate the sparseness of coefficients represented in the models.The results showed a low kurtosis in the distribution of coefficient with the surround-modulation model, but a low KL distance between the models indicated their distributions fairly closed to each other. Next, we modified the nonlinear function that controls sparseness in the cost function with the aim of improving the kurtosis.The modification did not improve the distribution.These results suggest that surround modulation would decrease sparseness of the information representation in V1 cells, or that representation might not be characterized solely by sparseness.
Keyword (in Japanese) (See Japanese page) 
(in English) Sparse Coding / Surrounding Modulation / V1 / / / / /  
Reference Info. ITE Tech. Rep., vol. 33, no. 17, HI2009-76, pp. 33-36, March 2009.
Paper # HI2009-76 
Date of Issue 2009-03-11 (HI) 
ISSN Print edition: ISSN 1342-6893
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Conference Information
Committee HI  
Conference Date 2009-03-18 - 2009-03-19 
Place (in Japanese) (See Japanese page) 
Place (in English) Tokyo Institute of Technology 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To HI 
Conference Code 2009-03-HI 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Statistical analysis of information expression in V1 receipt field with sparseness constraint 
Sub Title (in English)  
Keyword(1) Sparse Coding  
Keyword(2) Surrounding Modulation  
Keyword(3) V1  
1st Author's Name Yoshitaka Hirose  
1st Author's Affiliation University of Tsukuba (Univ. of Tsukuba)
2nd Author's Name Ko Sakai  
2nd Author's Affiliation University of Tsukuba (Univ. of Tsukuba)
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Speaker Author-1 
Date Time 2009-03-19 10:40:00 
Presentation Time 20 minutes 
Registration for HI 
Paper # HI2009-76 
Volume (vol) vol.33 
Number (no) no.17 
Page pp.33-36 
Date of Issue 2009-03-11 (HI) 

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