| A Sparse and Locally Shift Invariant Feature Extractor Applied to Document Images Recent countries visiting this post |  |
 | 5 | United States |
 | 1 | |
 | 1 | Russian Federation |
| A Sparse and Locally Shift Invariant Feature Extractor Applied to Document Images Recent countries visiting this post | |
| 5 | United States |
| 1 | |
| 1 | Russian Federation |