| Presentation | 2018-03-03 Construction of Riemann normal coordinate system in facial expression space Runa Sumiya, Reiner Lenz, Jinhui Chao, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Currently used spaces of facial expressions were psychological spaces built with subjective evaluation data such as SD scores, which have no direct correspondence with physical stimuli. To construct a facial expression space based from facial expression images using metrics of expression discrimination thresholds, it is possible to obtain a psychophysical expression space. Nowadays, facial expressions are represented by categories such as combinations of basic expressions with various weights which are qualitative representations in nature. Here we aimed to built a quantitative representation of facial expressions whose special coordinate values corresponding to physical stimulus and independent of categories. In this paper, we use facial expression discrimination thresholds measured from variations of facial expressions to define the expressive space as Riemann space with metric given by facial expression discrimination ellipse. We then construct, consider the Riemannian coordinate system of the expression space and discuss intrinsic geometry of the space. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Riemannian geometry / Expression discrimination threshold / Facial expression space |
| Paper # | HIP2017-98 |
| Date of Issue | 2018-02-24 (HIP) |
| Conference Information | |
| Committee | HIP / ASJ-H |
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| Conference Date | 2018/3/3(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | IT Souzoukan, Naha City |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | VR Psychology, Human Information Processing, Physiological Acoustics, Speech, Acoustics in general |
| Chair | Masahiro Ishii(Sapporo City Univ.) / Tatsuya Hirahara(Toyama Pref. Univ.) |
| Vice Chair | Miyuki Kamachi(Kogakuin Univ.) / Shuichi Sakamoto(Tohoku Univ.) / Seiji Nakagawa(Chiba Univ.) |
| Secretary | Miyuki Kamachi(Univ. of Tsukuba) / Shuichi Sakamoto(Nagoya Univ.) / Seiji Nakagawa(NICT) |
| Assistant | Atsushi Wada(NICT) / Kanaya Hidetoshi(Aichi Syukutoku Univ.) / Rika Mochizuki(NTT) |
| Paper Information | |
| Registration To | Technical Committee on Human Information Processing / Auditory Research Meeting |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Construction of Riemann normal coordinate system in facial expression space |
| Sub Title (in English) | |
| Keyword(1) | Riemannian geometry |
| Keyword(2) | Expression discrimination threshold |
| Keyword(3) | Facial expression space |
| 1st Author's Name | Runa Sumiya |
| 1st Author's Affiliation | Chuo University(Chuo Univ.) |
| 2nd Author's Name | Reiner Lenz |
| 2nd Author's Affiliation | Linkoping University(Linkoping Univ.) |
| 3rd Author's Name | Jinhui Chao |
| 3rd Author's Affiliation | Chuo University(Chuo Univ.) |
| Date | 2018-03-03 |
| Paper # | HIP2017-98 |
| Volume (vol) | vol.117 |
| Number (no) | HIP-470 |
| Page | pp.pp.25-28(HIP), |
| #Pages | 4 |
| Date of Issue | 2018-02-24 (HIP) |