| Presentation | 2017-12-16 A deterioration discrimination method of infrared reflective marker used for optical motion capture system. Ohbuchi Masashi, Toyohiko Hayashi, Shigehito Tanahashi, Hiroshi Tanaka, Hiroaki Inui, Hiroki Ninomiya, Katsuya Nobuhara, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | The optical motion capture system can measure the 3-D motion of infrared light reflective markers secured to measuring objects. One of its problems is that repetitive use of the markers gradually deteriorates their reflection characteristic due to the separation and/or stain of a reflective material, resulting in the increase of measurement error. In measurement site, however, deteriorated markers might be still used because the marker deterioration has been judged subjectively. Then this study proposed a digital camera-based method of judging the marker deterioration objectively and easily in measuring site. In order to reduce light environment effects, we photographed a subject marker and a referential normal marker located next to the subject simultaneously. Then we evaluated the deterioration level of the subject from the difference between the gray-scale histograms of images of the subject and the reference, and judged whether the subject is deteriorated or not by means of discriminant analysis. Experiments using 25 deteriorated markers and 10 normal markers verified that the subject could be judged in a positive discrimination rate of 88.0[%] |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Infrared reflective marker / Optical motion capture system / Marker deterioration / Marker discrimination |
| Paper # | MBE2017-61 |
| Date of Issue | 2017-12-09 (MBE) |
| Conference Information | |
| Committee | MBE / NC |
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| Conference Date | 2017/12/16(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Nagoya University |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | ME, general |
| Chair | Kazuki Nakajima(Univ. of Toyama) / Masafumi Hagiwara(Keio Univ.) |
| Vice Chair | Masaki Kyoso(TCU) / Yutaka Hirata(Chubu Univ.) |
| Secretary | Masaki Kyoso(Toyama Pref. Univ.) / Yutaka Hirata(Kindai Univ.) |
| Assistant | Kim Juhyon(Univ. of Toyama) / Takumi Kobayashi(YNU) / Yoshihisa Shinozawa(Keio Univ.) / Keiichiro Inagaki(Chubu Univ.) |
| Paper Information | |
| Registration To | Technical Committee on ME and Bio Cybernetics / Technical Committee on Neurocomputing |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A deterioration discrimination method of infrared reflective marker used for optical motion capture system. |
| Sub Title (in English) | |
| Keyword(1) | Infrared reflective marker |
| Keyword(2) | Optical motion capture system |
| Keyword(3) | Marker deterioration |
| Keyword(4) | Marker discrimination |
| 1st Author's Name | Ohbuchi Masashi |
| 1st Author's Affiliation | Niigata University(Niigata Univ.) |
| 2nd Author's Name | Toyohiko Hayashi |
| 2nd Author's Affiliation | Niigata University(Niigata Univ.) |
| 3rd Author's Name | Shigehito Tanahashi |
| 3rd Author's Affiliation | Niigata University(Niigata Univ.) |
| 4th Author's Name | Hiroshi Tanaka |
| 4th Author's Affiliation | Nobuhara Hospital and Institute of Biomechanics(Nobuhara Hospital) |
| 5th Author's Name | Hiroaki Inui |
| 5th Author's Affiliation | Nobuhara Hospital and Institute of Biomechanics(Nobuhara Hospital) |
| 6th Author's Name | Hiroki Ninomiya |
| 6th Author's Affiliation | Nobuhara Hospital and Institute of Biomechanics(Nobuhara Hospital) |
| 7th Author's Name | Katsuya Nobuhara |
| 7th Author's Affiliation | Nobuhara Hospital and Institute of Biomechanics(Nobuhara Hospital) |
| Date | 2017-12-16 |
| Paper # | MBE2017-61 |
| Volume (vol) | vol.117 |
| Number (no) | MBE-360 |
| Page | pp.pp.45-50(MBE), |
| #Pages | 6 |
| Date of Issue | 2017-12-09 (MBE) |