Calculate the orientation of lines.
The operator ::line_orientation returns the orientation (-2 < Phi 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) -> HTuple.double / long |
| Row coordinates of the starting points of the input lines. | |
|
ColBegin (input_control) |
line.begin.x(-array) -> HTuple.double / long |
| Column coordinates of the starting points of the input lines. | |
|
RowEnd (input_control) |
line.end.y(-array) -> HTuple.double / long |
| Row coordinates of the ending points of the input lines. | |
|
ColEnd (input_control) |
line.end.x(-array) -> HTuple.double / long |
| Column coordinates of the ending points of the input lines. | |
|
Phi (output_control) |
angle.rad(-array) -> (HTuple.) double * |
| Orientation of the input lines. | |
::line_orientation always returns the value H_MSG_TRUE.
::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
