junctions_skeleton——通過該運算元擷取骨架的交點和端點，可判斷前景的幾何簡單性（二次分割定位）

j unctions_skeleton (Operator)

Name

junctions_skeleton — Find junctions and end points in a skeleton.

Signature

junctions_skeleton(Region : EndPoints, JuncPoints : : )

Description

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.

Parallelization Multithreading type: reentrant (runs in parallel with non-exclusive operators). Multithreading scope: global (may be called from any thread). Automatically parallelized on tuple level.

Parameters

Region (input_object)  region(-array) → object

Input skeletons.

EndPoints (output_object)  region(-array) → object

Extracted end points.

Number of elements: EndPoints == Region

JuncPoints (output_object)  region(-array) → object

Extracted junctions.

Number of elements: JuncPoints == Region

Example (HDevelop)

* non-connected branches of a skeleton

skeleton(Region,Skeleton)

junctions_skeleton(Skeleton,EPoints,JPoints)

difference(S,JPoints,Rows)

set_system('heighbourhood',4)

connection(Rows,Parts)