Presentation 2020-03-04
Dimensionality estimation of neural responses to natural images in monkey V4
Atsushi Kodama, Ko Sakai,
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Abstract(in Japanese) (See Japanese page)
Abstract(in English) Neurons in monkey V4 show selectivity for various kinds of visual properties such as curvature, orientation, color, and texture.However, it has not been clarified how the neural populations integrate these features and represent visual information.We investigated the representation of visual information in V4 based on dimensionality, a quantitative indicator for estimating the degree of complexity in representation.Specifically, we calculated and estimated the intrinsic dimensionality by applying the principal component analysis to the neural responses from V4 while the monkey was seeing hundreds of kinds of stimuli, including natural image patches.The estimated dimensionality was approximately 43, indicating that about 40 type of ideal neurons would be capable of representing visual information in V4.
Keyword(in Japanese) (See Japanese page)
Keyword(in English) vision / V4 / dimensionality / ventral stream
Paper # NC2019-85
Date of Issue 2020-02-26 (NC)

Conference Information
Committee NC / MBE
Conference Date 2020/3/4(3days)
Place (in Japanese) (See Japanese page)
Place (in English) University of Electro Communications
Topics (in Japanese) (See Japanese page)
Topics (in English) Neuro Computing, Medical Engineering, etc.
Chair Hayaru Shouno(UEC) / Taishin Nomura(Osaka Univ.)
Vice Chair Kazuyuki Samejima(Tamagawa Univ) / Takashi Watanabe(Tohoku Univ.)
Secretary Kazuyuki Samejima(NAIST) / Takashi Watanabe(NTT)
Assistant Takashi Shinozaki(NICT) / Ken Takiyama(TUAT) / Yasuyuki Suzuki(Osaka Univ.) / Akihiro Karashima(Tohoku Inst. of Tech.)

Paper Information
Registration To Technical Committee on Neurocomputing / Technical Committee on ME and Bio Cybernetics
Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) Dimensionality estimation of neural responses to natural images in monkey V4
Sub Title (in English)
Keyword(1) vision
Keyword(2) V4
Keyword(3) dimensionality
Keyword(4) ventral stream
1st Author's Name Atsushi Kodama
1st Author's Affiliation University of Tsukuba(Univ. Tsukuba)
2nd Author's Name Ko Sakai
2nd Author's Affiliation University of Tsukuba(Univ. Tsukuba)
Date 2020-03-04
Paper # NC2019-85
Volume (vol) vol.119
Number (no) NC-453
Page pp.pp.57-60(NC),
#Pages 4
Date of Issue 2020-02-26 (NC)