| Presentation | 2009/1/5 MEASUREMENT OF THREE-DIMENSIONAL TRAJECTORIES OF BUBBLES AROUND A SWIMMER USING STEREO HIGH-SPEED CAMERA(International Workshop on Advanced Image Technology 2009) Tsuyoshi NOMURA, Sei IKEDA, Masataka IMURA, Yoshitsugu MANABE, Kunihiro CHIHARA, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | This paper proposes a method for measurement three-dimensional trajectories of bubbles generated around a swimmer's arms from stereo high-speed camera videos. This method is based on two techniques: two-dimensional trajectory estimation in single-camera images and trajectory pair matching in stereo-camera images. The two-dimensional trajectory is estimated by block matching using similarity of bubble shape and probability of bubble displacement. The trajectory matching is achieved by a consistensy test using epipolar constraint in multiple frames. The experimental results in two-dimensional trajectory estimation showed the estimation accuracy of 47% solely by the general optical flow estimation, whereas 71% taking the bubble displacement into consideration. This concludes bubble displacement is an efficient aspect in this estimation. In three-dimensional trajectory estimation, bubbles were visually captured moving along the flow generated by an arm; which means an efficient material for swimmers to swim faster. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Scientific Training for Swimming / Stereo Highspeed Camera / Three-Dimensional Trajectories of Bubbles / Optical Flow Estimation |
| Paper # | IE2008-178 |
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| Conference Information | |
| Committee | IE |
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| Conference Date | 2009/1/5(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
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| Paper Information | |
| Registration To | Image Engineering (IE) |
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| Language | ENG |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | MEASUREMENT OF THREE-DIMENSIONAL TRAJECTORIES OF BUBBLES AROUND A SWIMMER USING STEREO HIGH-SPEED CAMERA(International Workshop on Advanced Image Technology 2009) |
| Sub Title (in English) | |
| Keyword(1) | Scientific Training for Swimming |
| Keyword(2) | Stereo Highspeed Camera |
| Keyword(3) | Three-Dimensional Trajectories of Bubbles |
| Keyword(4) | Optical Flow Estimation |
| 1st Author's Name | Tsuyoshi NOMURA |
| 1st Author's Affiliation | Graduate School of Information Science Nara Institute of Science and Technology() |
| 2nd Author's Name | Sei IKEDA |
| 2nd Author's Affiliation | Graduate School of Information Science Nara Institute of Science and Technology |
| 3rd Author's Name | Masataka IMURA |
| 3rd Author's Affiliation | Graduate School of Information Science Nara Institute of Science and Technology |
| 4th Author's Name | Yoshitsugu MANABE |
| 4th Author's Affiliation | Graduate School of Information Science Nara Institute of Science and Technology |
| 5th Author's Name | Kunihiro CHIHARA |
| 5th Author's Affiliation | Graduate School of Information Science Nara Institute of Science and Technology |
| Date | 2009/1/5 |
| Paper # | IE2008-178 |
| Volume (vol) | vol.108 |
| Number (no) | 373 |
| Page | pp.pp.- |
| #Pages | 5 |
| Date of Issue | |