Calculate the orientation of lines.
The operator line_orientation returns the orientation (-pi/2 < Phi <= pi/2) of the given lines. If more than one line is to be treated the line and column indices can be passed as tuples. In this case Phi is, of course, also a tuple and contains the corresponding orientations.
The procedure is typically applied to model lines in order to select parallel image lines, which were found, e.g., by detect_edge_segments, via the operator select_lines.
|
RowBegin (input_control) |
line.begin.y(-array) -> real / integer |
| Row coordinates of the starting points of the input lines. | |
|
ColBegin (input_control) |
line.begin.x(-array) -> real / integer |
| Column coordinates of the starting points of the input lines. | |
|
RowEnd (input_control) |
line.end.y(-array) -> real / integer |
| Row coordinates of the ending points of the input lines. | |
|
ColEnd (input_control) |
line.end.x(-array) -> real / integer |
| Column coordinates of the ending points of the input lines. | |
|
Phi (output_control) |
angle.rad(-array) -> real |
| Orientation of the input lines. | |
line_orientation always returns the value 2 (H_MSG_TRUE).
line_orientation is reentrant and processed without parallelization.
sobel_amp, edges_image, threshold, hysteresis_threshold, split_skeleton_region, split_skeleton_lines
line_position, select_lines, partition_lines
line_position, select_lines, partition_lines, detect_edge_segments
Region processing
