| ::add_noise_white_contour_xld | Add noise to XLD contours. |
| ::affine_trans_contour_xld | Apply an arbitrary affine transformation to an XLD contour. |
| ::affine_trans_polygon_xld | Apply an arbitrary affine transformation to an XLD polygon. |
| ::clip_contours_xld | Clip an XLD contour. |
| ::combine_roads_xld | Combine road hypotheses from two resolution levels. |
| ::gen_parallel_contour_xld | Compute the parallel contour of an XLD contour. |
| ::regress_contours_xld | Calculate the parameters of a regression line to an XLD contour. |
| ::segment_contours_xld | Segment XLD contours into line segments and circular or elliptic arcs. |
| ::smooth_contours_xld | Smooth an XLD contour. |
| ::split_contours_xld | Split XLD contours at dominant points. |
| ::union_straight_contours_histo_xld | Merge neighboring straight contours having a similar direction. |
| ::union_straight_contours_xld | Merge neighboring straight contours having a similar distance from a given line. |