| A Component-Labeling Algorithm Using Contour Tracing Technique Recent countries visiting this post |  |
 | 9 | United States |
 | 2 | Russian Federation |
 | 1 |
| A Component-Labeling Algorithm Using Contour Tracing Technique Recent countries visiting this post | |
| 9 | United States |
| 2 | Russian Federation |
| 1 |