junctions_skeleton——通过该算子获取骨架的交点和端点，可判断前景的几何简单性（二次分割定位）

junctions_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 (seeskeleton). 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 withjunctions_skeleton the input regionRegion 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)