| expand_gray | Fill gaps between regions (depending on gray value or color) or split overlapping regions. |
| expand_gray_ref | Fill gaps between regions (depending on gray value or color) or split overlapping regions. |
| expand_line | Expand a region starting at a given line. |
| regiongrowing | Segment an image using regiongrowing. |
| regiongrowing_mean | Perform a regiongrowing using mean gray values. |
| regiongrowing_n | Segment an image using regiongrowing for multi-channel images. |