| Orientation Modulation for Data Hiding in Clustered-Dot Halftone Prints Recent countries visiting this post |  |
 | 8 | United States |
 | 1 | |
 | 1 | India |
 | 1 | Russian Federation |
| Orientation Modulation for Data Hiding in Clustered-Dot Halftone Prints Recent countries visiting this post | |
| 8 | United States |
| 1 | |
| 1 | India |
| 1 | Russian Federation |