| Presentation | 2001/3/10 Three-dimensional trajectory estimation for recognition of sign language Kiyoshi HOSHINO, Satoru ODO, Shihoko KAMISATO, Takeshi ARAKAKI, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | The purpose of this study is to estimate three-dimensional motions of the sign language with a single camera. In the system, first, a three-dimensional human model with three-dimensional polyhedrons with nine degrees of freedom was prepared, and two-dimensional image sequences with a CCD camera were applied. Moreover, optical flows in three frames before current time were used for the motion estimation, so that the system can be robust to self-occlusions by performer's own face and body. In the experiment, standstill, straight, circular, arc motions and their combinations were adopted for the estimation. As the results. the system realized the gesture estimation and tracking with high accuracy. And human voluntary movement model was constructed based on optimal control. An objective function was define as follows: square of the rate of change of acceleration multiplied by an exponential function of time integrated over the entire movement. Variational calculus was used to obtain the equation expressing the 3-D wrist trajectory. As the result of parameter estimation, even a small difference in a same sign language motion was clear in the parameters. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | sign language / 3-D gesture reproduction / 3-D human model / self-occlusions / model for human voluntary movement / parameter estimation |
| Paper # | NLP2000-170 |
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| Conference Information | |
| Committee | NLP |
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| Conference Date | 2001/3/10(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Nonlinear Problems (NLP) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Three-dimensional trajectory estimation for recognition of sign language |
| Sub Title (in English) | |
| Keyword(1) | sign language |
| Keyword(2) | 3-D gesture reproduction |
| Keyword(3) | 3-D human model |
| Keyword(4) | self-occlusions |
| Keyword(5) | model for human voluntary movement |
| Keyword(6) | parameter estimation |
| 1st Author's Name | Kiyoshi HOSHINO |
| 1st Author's Affiliation | Faculty of Engineering, University of the Ryukyus:Precursoy Research for Embryonic Science and Technology, Japan Science and Technology Corporation() |
| 2nd Author's Name | Satoru ODO |
| 2nd Author's Affiliation | Faculty of Engineering, University of the Ryukyus |
| 3rd Author's Name | Shihoko KAMISATO |
| 3rd Author's Affiliation | Faculty of Engineering, University of the Ryukyus |
| 4th Author's Name | Takeshi ARAKAKI |
| 4th Author's Affiliation | Faculty of Engineering, University of the Ryukyus |
| Date | 2001/3/10 |
| Paper # | NLP2000-170 |
| Volume (vol) | vol.100 |
| Number (no) | 681 |
| Page | pp.pp.- |
| #Pages | 7 |
| Date of Issue | |