| Efficient Active Appearance Model for Real-Time Head and Facial Feature Tracking Recent countries visiting this post |  |
 | 6 | United States |
 | 3 | |
 | 1 | France |
 | 1 | Sweden |
| Efficient Active Appearance Model for Real-Time Head and Facial Feature Tracking Recent countries visiting this post | |
| 6 | United States |
| 3 | |
| 1 | France |
| 1 | Sweden |