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Paper Abstract and Keywords
Presentation 2016-12-08 11:05
Intrinsic geometry of facial expression space based on facial expression discrimination thresholds
Runa Sumiya, Hajime Tasaki (Chuo Univ.), Reiner Lenz (Linkoping Univ.), Chao Jinhui (Chuo Univ.)
Abstract (in Japanese) (See Japanese page) 
(in English) We show in this paper that the expression space is not Euclidean. In particular, we measure the JND discrimination thresholds in the expression space. In the 3D space of the first three principle components, these JND thresholds are ellipsoids of which the shape, size are varying for different expressions, which are evidence that the expression space are not Euclidean but distorted or a Riemann space. These JND thresholds also define Riemann metric tensor of the expression space, which suggests the possibility of application using Riemann geometry.
Keyword (in Japanese) (See Japanese page) 
(in English) facial expression recognition / categorical theory / dimension theory / facial expression space / discrimination threshold / Riemann geometry / /  
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Conference Information
Committee HCGSYMPO  
Conference Date 2016-12-07 - 2016-12-09 
Place (in Japanese) (See Japanese page) 
Place (in English) Kochi City Culture Plaza (CUL-PORT) 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Human communication, etc. 
Paper Information
Registration To HCGSYMPO 
Conference Code 2016-12-HCGSYMPO 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Intrinsic geometry of facial expression space based on facial expression discrimination thresholds 
Sub Title (in English)  
Keyword(1) facial expression recognition  
Keyword(2) categorical theory  
Keyword(3) dimension theory  
Keyword(4) facial expression space  
Keyword(5) discrimination threshold  
Keyword(6) Riemann geometry  
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1st Author's Name Runa Sumiya  
1st Author's Affiliation Chuo University (Chuo Univ.)
2nd Author's Name Hajime Tasaki  
2nd Author's Affiliation Chuo University (Chuo Univ.)
3rd Author's Name Reiner Lenz  
3rd Author's Affiliation Linkoping University (Linkoping Univ.)
4th Author's Name Chao Jinhui  
4th Author's Affiliation Chuo University (Chuo Univ.)
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Speaker Author-1 
Date Time 2016-12-08 11:05:00 
Presentation Time 25 minutes 
Registration for HCGSYMPO 
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