opening_segopening_segOpeningSegOpeningSegopening_seg (算子)

名称

opening_segopening_segOpeningSegOpeningSegopening_seg — 分离重叠区域。

警告

opening_segopening_segOpeningSegOpeningSegOpeningSegopening_seg 已过时，仅出于向后兼容性考虑而保留。

签名

opening_seg(Region, StructElement : RegionOpening : : )

描述

The opening_segopening_segOpeningSegOpeningSegOpeningSegopening_seg operation is defined as a sequence of the following operators: erosion1erosion1Erosion1Erosion1Erosion1erosion1, connectionconnectionConnectionConnectionConnectionconnection and dilation1dilation1Dilation1Dilation1Dilation1dilation1 (see example). Only one iteration is done in erosion1erosion1Erosion1Erosion1Erosion1erosion1 and dilation1dilation1Dilation1Dilation1Dilation1dilation1。

opening_segopening_segOpeningSegOpeningSegOpeningSegopening_seg serves to separate overlapping regions whose area of overlap is smaller than StructElementStructElementStructElementStructElementstructElementstruct_element. It should be noted that the resulting regions can overlap without actually merging (see expand_regionexpand_regionExpandRegionExpandRegionExpandRegionexpand_region). opening_segopening_segOpeningSegOpeningSegOpeningSegopening_seg uses the center of gravity as the reference point of the structuring element.

Structuring elements (StructElementStructElementStructElementStructElementstructElementstruct_element) can be generated with operators such as gen_circlegen_circleGenCircleGenCircleGenCirclegen_circle, gen_rectangle1gen_rectangle1GenRectangle1GenRectangle1GenRectangle1gen_rectangle1, gen_rectangle2gen_rectangle2GenRectangle2GenRectangle2GenRectangle2gen_rectangle2, gen_ellipsegen_ellipseGenEllipseGenEllipseGenEllipsegen_ellipse, draw_regiondraw_regionDrawRegionDrawRegionDrawRegiondraw_region, gen_region_polygongen_region_polygonGenRegionPolygonGenRegionPolygonGenRegionPolygongen_region_polygon, gen_region_pointsgen_region_pointsGenRegionPointsGenRegionPointsGenRegionPointsgen_region_points, etc.

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) → object

Regions to be opened.

StructElementStructElementStructElementStructElementstructElementstruct_element (输入对象) region → object

Structuring element (position-invariant).

RegionOpeningRegionOpeningRegionOpeningRegionOpeningregionOpeningregion_opening (输出对象) region-array → object

Opened regions.

示例（HDevelop）

* Simulation of opening_seg
* opening_seg(Region,StructElement,RegionOpening):
    erosion1(Region,StructElement,H1,1)
    connection(H1,H2)
    dilation1(H2,StructElement,RegionOpening,1)

示例（C）

/* Simulation of opening_seg */
my_opening_seg(Hobject Region, Hobject StructElement, Hobject *Opening)
{
  Hobject  H1,H2;
  erosion1(Region,StructElement,&H1,1);
  connection(H1,&H2);
  dilation1(H2,StructElement,Opening,1);
}

/* separation of circular objects */
gen_random_regions(&Regions,"circle",8.5,10.5,0.0,0.0,0.0,0.0,400,512,512);
union1(Regions,&UnionReg);
gen_circle(&Mask,100,100,8.5);
opening_seg(UnionReg,Mask,&RegionsNew);

示例（HDevelop）

* Simulation of opening_seg
* opening_seg(Region,StructElement,RegionOpening):
    erosion1(Region,StructElement,H1,1)
    connection(H1,H2)
    dilation1(H2,StructElement,RegionOpening,1)

示例（HDevelop）

* Simulation of opening_seg
* opening_seg(Region,StructElement,RegionOpening):
    erosion1(Region,StructElement,H1,1)
    connection(H1,H2)
    dilation1(H2,StructElement,RegionOpening,1)

示例（HDevelop）

* Simulation of opening_seg
* opening_seg(Region,StructElement,RegionOpening):
    erosion1(Region,StructElement,H1,1)
    connection(H1,H2)
    dilation1(H2,StructElement,RegionOpening,1)

复杂度

Let F1 be the area of the input region, and F2 be the area of the structuring element. Then the runtime complexity for one region is:

结果

opening_segopening_segOpeningSegOpeningSegOpeningSegopening_seg 在所有参数正确时返回 2 ( H_MSG_TRUE )。当输入区域为空或不存在时，其行为可通过以下方式设置：

否则，将抛出异常。

可能的前趋

thresholdthresholdThresholdThresholdThresholdthreshold, regiongrowingregiongrowingRegiongrowingRegiongrowingRegiongrowingregiongrowing, connectionconnectionConnectionConnectionConnectionconnection, union1union1Union1Union1Union1union1, watershedswatershedsWatershedsWatershedsWatershedswatersheds, class_ndim_normclass_ndim_normClassNdimNormClassNdimNormClassNdimNormclass_ndim_norm, gen_circlegen_circleGenCircleGenCircleGenCirclegen_circle, gen_ellipsegen_ellipseGenEllipseGenEllipseGenEllipsegen_ellipse, gen_rectangle1gen_rectangle1GenRectangle1GenRectangle1GenRectangle1gen_rectangle1, gen_rectangle2gen_rectangle2GenRectangle2GenRectangle2GenRectangle2gen_rectangle2, draw_regiondraw_regionDrawRegionDrawRegionDrawRegiondraw_region, gen_region_pointsgen_region_pointsGenRegionPointsGenRegionPointsGenRegionPointsgen_region_points, gen_region_polygon_filledgen_region_polygon_filledGenRegionPolygonFilledGenRegionPolygonFilledGenRegionPolygonFilledgen_region_polygon_filled

可能的后继

expand_regionexpand_regionExpandRegionExpandRegionExpandRegionexpand_region, reduce_domainreduce_domainReduceDomainReduceDomainReduceDomainreduce_domain, select_shapeselect_shapeSelectShapeSelectShapeSelectShapeselect_shape, area_centerarea_centerAreaCenterAreaCenterAreaCenterarea_center, connectionconnectionConnectionConnectionConnectionconnection

替代

erosion1erosion1Erosion1Erosion1Erosion1erosion1, connectionconnectionConnectionConnectionConnectionconnection, dilation1dilation1Dilation1Dilation1Dilation1dilation1

模块

基础

算子