Operator Reference

HALCON Operator Reference / Morphology / Region
ClassesClasses | | Operators

closing_circleclosing_circleClosingCircleClosingCircleclosing_circle (Operator)

closing_circleclosing_circleClosingCircleClosingCircleclosing_circle — Close a region with a circular structuring element.

Signature

closing_circle(Region : RegionClosing : Radius : )

Herror closing_circle(const Hobject Region, Hobject* RegionClosing, double Radius)

Herror T_closing_circle(const Hobject Region, Hobject* RegionClosing, const Htuple Radius)

void ClosingCircle(const HObject& Region, HObject* RegionClosing, const HTuple& Radius)

HRegion HRegion::ClosingCircle(const HTuple& Radius) const

HRegion HRegion::ClosingCircle(double Radius) const

static void HOperatorSet.ClosingCircle(HObject region, out HObject regionClosing, HTuple radius)

HRegion HRegion.ClosingCircle(HTuple radius)

HRegion HRegion.ClosingCircle(double radius)

def closing_circle(region: HObject, radius: Union[float, int]) -> HObject

Description

closing_circleclosing_circleClosingCircleClosingCircleclosing_circle behaves analogously to closingclosingClosingClosingclosing, i.e., the regions' boundaries are smoothed and holes within a region which are smaller than the circular structuring element of radius RadiusRadiusRadiusradiusradius are closed. The closing_circleclosing_circleClosingCircleClosingCircleclosing_circle operation is defined as a dilation followed by a Minkowski subtraction, both with the same circular structuring element.

Attention

closing_circleclosing_circleClosingCircleClosingCircleclosing_circle is applied to each input region separately. If gaps between different regions are to be closed, union1union1Union1Union1union1 or union2union2Union2Union2union2 has to be called first.

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) → objectHRegionHObjectHObjectHobject

Regions to be closed.

RegionClosingRegionClosingRegionClosingregionClosingregion_closing (output_object)  region(-array) → objectHRegionHObjectHObjectHobject *

Closed regions.

RadiusRadiusRadiusradiusradius (input_control)  real → HTupleUnion[float, int]HTupleHtuple (real / integer) (double / int / long) (double / Hlong) (double / Hlong)

Radius of the circular structuring element.

Default: 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

Value range: 0.5 ≤ Radius Radius Radius radius radius ≤ 511.5 (lin)

Minimum increment: 1.0

Recommended increment: 1.0

Example (C)

my_closing_circle(Hobject In, double Radius, Hobject *Out)
{
  Hobject  tmp, StructElement;
  gen_circle(StructElement,100.0,100.0,Radius);
  dilation1(In,StructElement,&tmp,1);
  minkowski_sub1(tmp,StructElement,Out,1);
}

Complexity

Let F1 be the area of the input region. Then the runtime complexity for one region is:

Result

closing_circleclosing_circleClosingCircleClosingCircleclosing_circle returns 2 ( H_MSG_TRUE) if all parameters are correct. The behavior in case of empty or no input region can be set via:

Otherwise, an exception is raised.

Possible Predecessors

thresholdthresholdThresholdThresholdthreshold, regiongrowingregiongrowingRegiongrowingRegiongrowingregiongrowing, connectionconnectionConnectionConnectionconnection, union1union1Union1Union1union1, watershedswatershedsWatershedsWatershedswatersheds, class_ndim_normclass_ndim_normClassNdimNormClassNdimNormclass_ndim_norm

Possible Successors

reduce_domainreduce_domainReduceDomainReduceDomainreduce_domain, select_shapeselect_shapeSelectShapeSelectShapeselect_shape, area_centerarea_centerAreaCenterAreaCenterarea_center, connectionconnectionConnectionConnectionconnection

Alternatives

rank_regionrank_regionRankRegionRankRegionrank_region, fill_upfill_upFillUpFillUpfill_up, closingclosingClosingClosingclosing

See also

dilation1dilation1Dilation1Dilation1dilation1, minkowski_sub1minkowski_sub1MinkowskiSub1MinkowskiSub1minkowski_sub1, erosion1erosion1Erosion1Erosion1erosion1, openingopeningOpeningOpeningopening

Module

Foundation

ClassesClasses | | Operators