| ::gen_contour_polygon_xld | Generate an XLD contour from a polygon (given as tuples). |
| ::gen_contour_region_xld | Generate XLD contours from regions. |
| ::gen_contours_skeleton_xld | Convert a skeleton into XLD contours. |
| ::gen_ellipse_contour_xld | Creation of an XLD contour corresponding to an elliptic arc. |
| ::gen_parallels_xld | Extract parallel XLD polygons. |
| ::gen_polygons_xld | Approximate XLD contours by polygons. |
| ::mod_parallels_xld | Extract parallel XLD polygons enclosing a homogeneous area. |