| Scale Invariant Feature Transform with Irregular Orientation Histogram Binning Recent countries visiting this post |  |
 | 9 | United States |
 | 7 | |
 | 3 | Vietnam |
 | 1 | Germany |
 | 1 | China |
 | 1 | India |
| Scale Invariant Feature Transform with Irregular Orientation Histogram Binning Recent countries visiting this post | |
| 9 | United States |
| 7 | |
| 3 | Vietnam |
| 1 | Germany |
| 1 | China |
| 1 | India |