| Circular Data Matrix Fiducial System and Robust Image Processing for a Wearable Vision-Inertial Self-Tracker Recent countries visiting this post |  |
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| Circular Data Matrix Fiducial System and Robust Image Processing for a Wearable Vision-Inertial Self-Tracker Recent countries visiting this post | |
| 7 | United States |
| 1 | China |
| 1 | France |
| 1 |