get_region_contour — Access the contour of an object.
The operator get_region_contour returns the contour of a region.
A contour is a result
of line (Rows) and column coordinates (Columns),
describing the boundary
of the region. The contour lies on the region.
It starts at the smallest line number. In that line at the
pixel with the largest column index.
The rotation direction is clockwise. The first pixel of the contour
is identical with the last. Holes of the region are ignored.
The operator get_region_contour returns the coordinates in the form of
tuples. An empty region is passed as empty tuple.
Holes of the region are ignored. Only one region may be passed, and this region must have exactly one connection component.
Region (input_object) region → object
Output region.
Rows (output_control) contour.y-array → (integer)
Line numbers of the contour pixels.
Columns (output_control) contour.x-array → (integer)
Column numbers of the contour pixels.
Number of elements: Columns == Rows
The operator get_region_contour normally returns the value 2 (H_MSG_TRUE).
If more than one connection component is passed an exception is raised.
The behavior in case of empty input (no input regions available) is set via
the operator set_system('no_object_result',<Result>).
sobel_amp,
threshold,
skeleton,
edges_image,
gen_rectangle1,
gen_circle
Foundation