| affine_trans_region | Apply an arbitrary affine 2D transformation to regions. |
| mirror_region | Reflect a region about an axis parallel to the x- or y-axis. |
| move_region | Translate a region. |
| projective_trans_region | Apply a projective transformation to a region. |
| transpose_region | Reflect a region about a point. |
| zoom_region | Zoom a region. |