junctions_skeleton — Find junctions and end points in a skeleton.
junctions_skeleton detects junctions and end points in a skeleton (see skeleton). The junctions in the input region Region are output as a region in JuncPoints, while the end points are output as a region in EndPoints.
To obtain reasonable results with junctions_skeleton the input region Region must not contain lines which are more than one pixel wide. Regions obtained by skeleton meet this condition, while regions obtained by morph_skeleton do not meet this condition in general.
Extracted end points.
Number of elements: EndPoints == Region
Number of elements: JuncPoints == Region
* non-connected branches of a skeleton skeleton(Region,Skeleton) junctions_skeleton(Skeleton,EPoints,JPoints) difference(S,JPoints,Rows) set_system('neighborhood',4) connection(Rows,Parts)
Let F be the area of the input region. Then the runtime complexity is O(F).
junctions_skeleton always returns the value 2 (H_MSG_TRUE). The behavior in case of empty input (no regions given) can be set via set_system('no_object_result',<Result>), the behavior in case of an empty input region via set_system('empty_region_result',<Result>), and the behavior in case of an empty result region via set_system('store_empty_region',<'true'/'false'>). If necessary, an exception is raised.
area_center, connection, get_region_points, difference