| ::hough_circle_trans | Return the Hough-Transform for circles with a given radius. |
| ::hough_circles | Centres of circles for a specific radius. |
| ::hough_line_trans | Produce the Hough transform for lines within regions. |
| ::hough_lines | Detect lines in edge images with the help of the Hough transform and returns it in HNF. |
| ::select_matching_lines | Select those lines from a set of lines (in HNF) which fit best into a region. |