| Content-Based Synchronization Using the Local Invariant Feature for Robust Watermarking Recent countries visiting this post |  |
 | 5 | United States |
 | 2 | China |
 | 1 |
| Content-Based Synchronization Using the Local Invariant Feature for Robust Watermarking Recent countries visiting this post | |
| 5 | United States |
| 2 | China |
| 1 |