union1union1Union1Union1union1 (算子)

名称

union1union1Union1Union1union1 — 返回所有输入区域的并集。

签名

union1(Region : RegionUnion : : )

描述

union1union1Union1Union1Union1union1 computes the union of all input regions and returns the result in RegionUnionRegionUnionRegionUnionRegionUnionregionUnionregion_union。

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）。
未采用并行化处理。

参数

RegionRegionRegionRegionregionregion (输入对象) region-array → object

Regions of which the union is to be computed.

RegionUnionRegionUnionRegionUnionRegionUnionregionUnionregion_union (输出对象) region → object

Union of all input regions.

元素数量： RegionUnion <= Region

示例（HDevelop）

* Union of segmentation results:
threshold(Image,Region1,128,255)
dyn_threshold(Image,Mean,Region2,5,'light')
concat_obj(Region1,Region2,Regions)
union1(Regions,RegionUnion)

示例（C）

/* Union of segmentation results: */
threshold(Image,&Region1,128.0,255.0);
dyn_threshold(Image,Mean,&Region2,5.0,"light");
concat_obj(Region1,Region2,&Regions);
union1(Regions,&RegionUnion);

示例（HDevelop）

* Union of segmentation results:
threshold(Image,Region1,128,255)
dyn_threshold(Image,Mean,Region2,5,'light')
concat_obj(Region1,Region2,Regions)
union1(Regions,RegionUnion)

示例（HDevelop）

* Union of segmentation results:
threshold(Image,Region1,128,255)
dyn_threshold(Image,Mean,Region2,5,'light')
concat_obj(Region1,Region2,Regions)
union1(Regions,RegionUnion)

示例（HDevelop）

* Union of segmentation results:
threshold(Image,Region1,128,255)
dyn_threshold(Image,Mean,Region2,5,'light')
concat_obj(Region1,Region2,Regions)
union1(Regions,RegionUnion)

复杂度

Let F be the sum of all areas of the input regions. Then the runtime complexity is O(log(sqrt(F)) * sqrt(F)).

结果

union1union1Union1Union1Union1union1 始终返回 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

thresholdthresholdThresholdThresholdThresholdthreshold, connectionconnectionConnectionConnectionConnectionconnection, regiongrowingregiongrowingRegiongrowingRegiongrowingRegiongrowingregiongrowing, pouringpouringPouringPouringPouringpouring

可能的后继

select_shapeselect_shapeSelectShapeSelectShapeSelectShapeselect_shape, disp_regiondisp_regionDispRegionDispRegionDispRegiondisp_region

替代

union2union2Union2Union2Union2union2

另见

intersectionintersectionIntersectionIntersectionIntersectionintersection, complementcomplementComplementComplementComplementcomplement

模块

基础

算子