Name
erosion_circleerosion_circleErosionCircleerosion_circleErosionCircleErosionCircle — Erode a region with a circular structuring element.
erosion_circleerosion_circleErosionCircleerosion_circleErosionCircleErosionCircle applies a Minkowski subtraction with a
circular structuring element to the input regions RegionRegionRegionRegionRegionregion.
Because the circular mask is symmetrical, this is identical to an
erosion. The size of the circle used as structuring element is
determined by RadiusRadiusRadiusRadiusRadiusradius.
The operator results in reduced regions, smoothed region boundaries,
and the regions smaller than the circular mask are eliminated.
It is useful to select only values like 3.5,
5.5, etc. for RadiusRadiusRadiusRadiusRadiusradius in order to avoid a translation
of a region, because integer radii result in a circle having a
non-integer center of gravity which is rounded to the next integer.
- Multithreading type: reentrant (runs in parallel with non-exclusive operators).
- Multithreading scope: global (may be called from any thread).
- Automatically parallelized on tuple level.
Radius of the circular structuring element.
Default value: 3.5
Suggested values: 1.5, 2.5, 3.5, 4.5, 5.5, 7.5, 9.5, 12.5, 15.5, 19.5, 25.5, 33.5, 45.5, 60.5, 110.5
Typical range of values: 0.5
≤
Radius
Radius
Radius
Radius
Radius
radius
≤
511.5 (lin)
Minimum increment: 1.0
Recommended increment: 1.0
#include "HIOStream.h"
#if !defined(USE_IOSTREAM_H)
using namespace std;
#endif
#include "HalconCpp.h"
main()
{
cout << "Simulation of 'erosion_circle ()'" << endl;
cout << "First = original image " << endl;
cout << "Red = after segmentation " << endl;
cout << "Blue = after erosion " << endl;
HByteImage img("monkey");
HWindow w;
HRegion circ = HRegion::GenCircle (10, 10, 1.5);
HRegionArray regs = (img >= 128).Connection();
HRegionArray minsub = regs.MinkowskiSub1 (circ, 1);
img.Display (w); w.Click ();
w.SetColor ("red"); regs.Display (w); w.Click ();
w.SetColor ("blue"); minsub.Display (w); w.Click ();
return(0);
}
my_erosion_circle(Hobject In, double Radius, Hobject *Out)
{
Hobject Circle;
gen_circle(&Circle,100.0,100.0,Radius);
minkowski_sub1(In,Circle,Out,1);
clear_obj(Circle);
}
#include "HIOStream.h"
#if !defined(USE_IOSTREAM_H)
using namespace std;
#endif
#include "HalconCpp.h"
main()
{
cout << "Simulation of 'erosion_circle ()'" << endl;
cout << "First = original image " << endl;
cout << "Red = after segmentation " << endl;
cout << "Blue = after erosion " << endl;
HByteImage img("monkey");
HWindow w;
HRegion circ = HRegion::GenCircle (10, 10, 1.5);
HRegionArray regs = (img >= 128).Connection();
HRegionArray minsub = regs.MinkowskiSub1 (circ, 1);
img.Display (w); w.Click ();
w.SetColor ("red"); regs.Display (w); w.Click ();
w.SetColor ("blue"); minsub.Display (w); w.Click ();
return(0);
}
#include "HIOStream.h"
#if !defined(USE_IOSTREAM_H)
using namespace std;
#endif
#include "HalconCpp.h"
main()
{
cout << "Simulation of 'erosion_circle ()'" << endl;
cout << "First = original image " << endl;
cout << "Red = after segmentation " << endl;
cout << "Blue = after erosion " << endl;
HByteImage img("monkey");
HWindow w;
HRegion circ = HRegion::GenCircle (10, 10, 1.5);
HRegionArray regs = (img >= 128).Connection();
HRegionArray minsub = regs.MinkowskiSub1 (circ, 1);
img.Display (w); w.Click ();
w.SetColor ("red"); regs.Display (w); w.Click ();
w.SetColor ("blue"); minsub.Display (w); w.Click ();
return(0);
}
#include "HIOStream.h"
#if !defined(USE_IOSTREAM_H)
using namespace std;
#endif
#include "HalconCpp.h"
main()
{
cout << "Simulation of 'erosion_circle ()'" << endl;
cout << "First = original image " << endl;
cout << "Red = after segmentation " << endl;
cout << "Blue = after erosion " << endl;
HByteImage img("monkey");
HWindow w;
HRegion circ = HRegion::GenCircle (10, 10, 1.5);
HRegionArray regs = (img >= 128).Connection();
HRegionArray minsub = regs.MinkowskiSub1 (circ, 1);
img.Display (w); w.Click ();
w.SetColor ("red"); regs.Display (w); w.Click ();
w.SetColor ("blue"); minsub.Display (w); w.Click ();
return(0);
}
#include "HIOStream.h"
#if !defined(USE_IOSTREAM_H)
using namespace std;
#endif
#include "HalconCpp.h"
main()
{
cout << "Simulation of 'erosion_circle ()'" << endl;
cout << "First = original image " << endl;
cout << "Red = after segmentation " << endl;
cout << "Blue = after erosion " << endl;
HByteImage img("monkey");
HWindow w;
HRegion circ = HRegion::GenCircle (10, 10, 1.5);
HRegionArray regs = (img >= 128).Connection();
HRegionArray minsub = regs.MinkowskiSub1 (circ, 1);
img.Display (w); w.Click ();
w.SetColor ("red"); regs.Display (w); w.Click ();
w.SetColor ("blue"); minsub.Display (w); w.Click ();
return(0);
}
Let F1 be the area of an input region. Then the runtime complexity for one
region is:
erosion_circleerosion_circleErosionCircleerosion_circleErosionCircleErosionCircle returns 2 (H_MSG_TRUE) if all parameters are
correct. The behavior in case of empty or no input region can be
set via:
-
no region:
set_system('no_object_result',<RegionResult>)
-
empty region:
set_system('empty_region_result',<RegionResult>)
Otherwise, an exception is raised.
thresholdthresholdThresholdthresholdThresholdThreshold,
regiongrowingregiongrowingRegiongrowingregiongrowingRegiongrowingRegiongrowing,
watershedswatershedsWatershedswatershedsWatershedsWatersheds,
class_ndim_normclass_ndim_normClassNdimNormclass_ndim_normClassNdimNormClassNdimNorm
connectionconnectionConnectionconnectionConnectionConnection,
reduce_domainreduce_domainReduceDomainreduce_domainReduceDomainReduceDomain,
select_shapeselect_shapeSelectShapeselect_shapeSelectShapeSelectShape,
area_centerarea_centerAreaCenterarea_centerAreaCenterAreaCenter
minkowski_sub1minkowski_sub1MinkowskiSub1minkowski_sub1MinkowskiSub1MinkowskiSub1
gen_circlegen_circleGenCirclegen_circleGenCircleGenCircle,
dilation_circledilation_circleDilationCircledilation_circleDilationCircleDilationCircle,
closing_circleclosing_circleClosingCircleclosing_circleClosingCircleClosingCircle,
opening_circleopening_circleOpeningCircleopening_circleOpeningCircleOpeningCircle
Foundation