| 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_line_trans_dir | Compute the Hough transform for lines using local gradient direction. |
| hough_lines | Detect lines in edge images with the help of the Hough transform and returns it in HNF. |
| hough_lines_dir | Detect lines in edge images with the help of the Hough transform using local gradient direction and return them in normal form. |
| select_matching_lines | Select those lines from a set of lines (in HNF) which fit best into a region. |