skeletonskeletonSkeletonSkeletonskeleton (算子)
名称
skeletonskeletonSkeletonSkeletonskeleton — 计算区域的骨架。
签名
def skeleton(region: HObject) -> HObject
描述
skeletonskeletonSkeletonSkeletonSkeletonskeleton 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.
执行信息
- 多线程类型：可重入（与非独占算子并行运行）。
- 多线程作用域：全局（可从任何线程调用）。
- 在元组级别上自动并行化。
参数
RegionRegionRegionRegionregionregion (输入对象) region(-array) → objectHRegionHObjectHRegionHobject
Region to be thinned.
SkeletonSkeletonSkeletonSkeletonskeletonskeleton (输出对象) region(-array) → objectHRegionHObjectHRegionHobject *
Resulting skeleton.
元素数量：
Skeleton == Region
复杂度
Let F be the area of the enclosing rectangle of the input region.
Then the runtime complexity is O(F) (per region).
结果
skeletonskeletonSkeletonSkeletonSkeletonskeleton 在所有参数正确时返回 2 ( H_MSG_TRUE )。当输入为空（未指定区域）时则可设置行为通过 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>)set_system("no_object_result",<Result>) 以及输入区域为空时可设置行为通过 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>)set_system("empty_region_result",<Result>)。如有必要，则抛出异常。
可能的前趋
sobel_ampsobel_ampSobelAmpSobelAmpSobelAmpsobel_amp,
edges_imageedges_imageEdgesImageEdgesImageEdgesImageedges_image,
bandpass_imagebandpass_imageBandpassImageBandpassImageBandpassImagebandpass_image,
thresholdthresholdThresholdThresholdThresholdthreshold,
hysteresis_thresholdhysteresis_thresholdHysteresisThresholdHysteresisThresholdHysteresisThresholdhysteresis_threshold
可能的后继
junctions_skeletonjunctions_skeletonJunctionsSkeletonJunctionsSkeletonJunctionsSkeletonjunctions_skeleton,
pruningpruningPruningPruningPruningpruning
替代
morph_skeletonmorph_skeletonMorphSkeletonMorphSkeletonMorphSkeletonmorph_skeleton,
thinningthinningThinningThinningThinningthinning
另见
gray_skeletongray_skeletonGraySkeletonGraySkeletonGraySkeletongray_skeleton,
sobel_ampsobel_ampSobelAmpSobelAmpSobelAmpsobel_amp,
edges_imageedges_imageEdgesImageEdgesImageEdgesImageedges_image,
robertsrobertsRobertsRobertsRobertsroberts,
bandpass_imagebandpass_imageBandpassImageBandpassImageBandpassImagebandpass_image,
thresholdthresholdThresholdThresholdThresholdthreshold
参考文献
Eckardt, U. “Verdünnung mit Perfekten Punkten”,
Proceedings 10. DAGM-Symposium, IFB 180, Zurich, 1988
模块
基础