skeletonskeletonSkeletonSkeleton (Operator)
Name
skeletonskeletonSkeletonSkeleton — Compute the skeleton of a region.
Signature
Description
skeletonskeletonSkeletonSkeletonSkeleton computes the skeleton, i.e., the medial axis of the input
regions. The skeleton is constructed in a way that each point on it
can be seen as the center point of a circle with the largest radius possible
while still being completely contained in the region.
Execution Information
- 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
RegionRegionRegionRegionregion (input_object) region(-array) → objectHRegionHRegionHobject
Region to be thinned.
SkeletonSkeletonSkeletonSkeletonskeleton (output_object) region(-array) → objectHRegionHRegionHobject *
Resulting skeleton.
Number of elements: Skeleton == Region
Complexity
Let F be the area of the enclosing rectangle of the input region.
Then the runtime complexity is O(F) (per region).
Result
skeletonskeletonSkeletonSkeletonSkeleton returns 2 (H_MSG_TRUE) if all parameters are correct.
The behavior in case of empty input (no regions given) can be set
via set_system('no_object_result',<Result>)set_system("no_object_result",<Result>)SetSystem("no_object_result",<Result>)SetSystem("no_object_result",<Result>)SetSystem("no_object_result",<Result>)
and the behavior in case of an empty input region via
set_system('empty_region_result',<Result>)set_system("empty_region_result",<Result>)SetSystem("empty_region_result",<Result>)SetSystem("empty_region_result",<Result>)SetSystem("empty_region_result",<Result>).
If necessary, an exception is raised.
Possible Predecessors
sobel_ampsobel_ampSobelAmpSobelAmpSobelAmp,
edges_imageedges_imageEdgesImageEdgesImageEdgesImage,
bandpass_imagebandpass_imageBandpassImageBandpassImageBandpassImage,
thresholdthresholdThresholdThresholdThreshold,
hysteresis_thresholdhysteresis_thresholdHysteresisThresholdHysteresisThresholdHysteresisThreshold
Possible Successors
junctions_skeletonjunctions_skeletonJunctionsSkeletonJunctionsSkeletonJunctionsSkeleton,
pruningpruningPruningPruningPruning
Alternatives
morph_skeletonmorph_skeletonMorphSkeletonMorphSkeletonMorphSkeleton,
thinningthinningThinningThinningThinning
See also
gray_skeletongray_skeletonGraySkeletonGraySkeletonGraySkeleton,
sobel_ampsobel_ampSobelAmpSobelAmpSobelAmp,
edges_imageedges_imageEdgesImageEdgesImageEdgesImage,
robertsrobertsRobertsRobertsRoberts,
bandpass_imagebandpass_imageBandpassImageBandpassImageBandpassImage,
thresholdthresholdThresholdThresholdThreshold
References
Eckardt, U. “Verdünnung mit Perfekten Punkten”,
Proceedings 10. DAGM-Symposium, IFB 180, Zurich, 1988
Module
Foundation