| Kernel-based learning of cast shadows from a physical model of light sources and surfaces for low-level segmentation Recent countries visiting this post |  |
 | 8 | United States |
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| Kernel-based learning of cast shadows from a physical model of light sources and surfaces for low-level segmentation Recent countries visiting this post | |
| 8 | United States |
| 3 | |
| 1 | Japan |