Produces the Hough transform for lines within regions.
The operator hough_line_trans calculates the Hough transform for lines in those regions transmitted by Region. Thereby the angle and the length of the lines´ normal vectors are registered in the parameter space (respectively the Hough- or accumulator space), this means that the parameterization is executed according to the HNF.
The result is registered in a newly generated Int2-Image (HoughImage), whereby the x-axis is equivalent to the angle between the normal vector and the x-axis (in the original image), and the y-axis is equivalent to the distance of the line from the origin.
The angle ranges from -90 to 180 degrees and will be registered with a resolution of 1 / AngleResolution, which means that one pixel in x-direction is equivalent to 1 / AngleResolution and that the HoughImage has a width of 270 * AngleResolution + 1 pixel. The height of the HoughImage corresponds to the diagonal of the surrounding rectangle of the input region.
The maximums in the result image are equivalent to the parameter values of the lines in the original image.
Region (input_object) |
region -> object |
Binary edge image in which lines are to be detected. |
HoughImage (output_object) |
image -> object : int2 |
Hough transform for lines. |
AngleResolution (input_control) |
integer -> integer |
Adjusting the resolution in the angle area. | |
Default value: 4 | |
List of values: 1, 2, 4, 8 |
hough_circle_trans, store_hesse_lines