| read_image | Read an image with different file formats. |
| read_info | Query information about an image file. |
| read_picture | Read images in graphic formats |
| read_region | Read HORUS regions. |
| read_sequence | Read images. |
| write_image | Write HORUS image. |
| write_picture__ | Write images in graphic formats. |
| write_region | Write regions on file. |