| An Efficient Method for Filtering Image-Based Spam E-mail Recent countries visiting this post |  |
 | 6 | United States |
 | 4 | Russian Federation |
 | 1 | China |
 | 1 |
| An Efficient Method for Filtering Image-Based Spam E-mail Recent countries visiting this post | |
| 6 | United States |
| 4 | Russian Federation |
| 1 | China |
| 1 |