dilation_rectangle1dilation_rectangle1DilationRectangle1DilationRectangle1dilation_rectangle1 (Operator)

Name

dilation_rectangle1dilation_rectangle1DilationRectangle1DilationRectangle1dilation_rectangle1 — Dilate a region with a rectangular structuring element.

Signature

dilation_rectangle1(Region : RegionDilation : Width, Height : )

Description

dilation_rectangle1dilation_rectangle1DilationRectangle1DilationRectangle1DilationRectangle1dilation_rectangle1 applies a dilation with a rectangular structuring element to the input regions RegionRegionRegionRegionregionregion. The size of the structuring rectangle is WidthWidthWidthWidthwidthwidth x HeightHeightHeightHeightheightheight. The operator results in enlarged regions, and the holes smaller than the rectangular mask in the interior of the regions are closed.

dilation_rectangle1dilation_rectangle1DilationRectangle1DilationRectangle1DilationRectangle1dilation_rectangle1 is a very fast operation because the height of the rectangle enters only logarithmically into the runtime complexity, while the width does not enter at all. This leads to excellent runtime efficiency, even in the case of very large rectangles (edge length > 100).

Attention

dilation_rectangle1dilation_rectangle1DilationRectangle1DilationRectangle1DilationRectangle1dilation_rectangle1 is applied to each input region separately. If gaps between different regions are to be closed, union1union1Union1Union1Union1union1 or union2union2Union2Union2Union2union2 has to be called first.

To enlarge a region by the same amount in all directions, WidthWidthWidthWidthwidthwidth and HeightHeightHeightHeightheightheight must be odd. If this is not the case, the region is dilated by a larger amount at the right or at the bottom, respectively, than at the left or at the top.

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

RegionRegionRegionRegionregionregion (input_object) region(-array) → object

Regions to be dilated.

RegionDilationRegionDilationRegionDilationRegionDilationregionDilationregion_dilation (output_object) region(-array) → object

Dilated regions.

WidthWidthWidthWidthwidthwidth (input_control) extent.x → (integer)

Width of the structuring rectangle.

Default: 11

Suggested values: 1, 2, 3, 4, 5, 11, 15, 21, 31, 51, 71, 101, 151, 201

Value range: 1 ≤ Width Width Width Width width width ≤ 511 (lin)

Minimum increment: 1

Recommended increment: 10

HeightHeightHeightHeightheightheight (input_control) extent.y → (integer)

Height of the structuring rectangle.

Default: 11

Suggested values: 1, 2, 3, 4, 5, 11, 15, 21, 31, 51, 71, 101, 151, 201

Value range: 1 ≤ Height Height Height Height height height ≤ 511 (lin)

Minimum increment: 1

Recommended increment: 10

Example (C++ (HALCON 5.0-10.0))

#include "HIOStream.h"
#if !defined(USE_IOSTREAM_H)
using namespace std;
#endif
#include "HalconCpp.h"

main()
{
  cout << "Reproduction of 'dilation_rectangle ()'" << endl;
  cout << "First = original image " << endl;
  cout << "Blue  = after dilation " << endl;
  cout << "Red   = after segmentation " << endl;

  HByteImage img("monkey");
  HWindow    w;

  HRegionArray regs   = (img >= 220).Connection();
  HRegionArray dilreg = regs.DilationRectangle1 (2, 4);

                        img.Display (w);      w.Click ();
  w.SetColor ("blue");  dilreg.Display (w);   w.Click ();
  w.SetColor ("red");   regs.Display (w);     w.Click ();

  return(0);
}

Example (C)

threshold(Image,&Light,220.0,255.0);
dilation_rectangle1(Light,&Wide,50,50);
set_color(WindowHandle,"red");
disp_region(Wide,WindowHandle);
set_color(WindowHandle,"white");
disp_region(Light,WindowHandle);

Example (C++ (HALCON 5.0-10.0))

#include "HIOStream.h"
#if !defined(USE_IOSTREAM_H)
using namespace std;
#endif
#include "HalconCpp.h"

main()
{
  cout << "Reproduction of 'dilation_rectangle ()'" << endl;
  cout << "First = original image " << endl;
  cout << "Blue  = after dilation " << endl;
  cout << "Red   = after segmentation " << endl;

  HByteImage img("monkey");
  HWindow    w;

  HRegionArray regs   = (img >= 220).Connection();
  HRegionArray dilreg = regs.DilationRectangle1 (2, 4);

                        img.Display (w);      w.Click ();
  w.SetColor ("blue");  dilreg.Display (w);   w.Click ();
  w.SetColor ("red");   regs.Display (w);     w.Click ();

  return(0);
}

Example (C++ (HALCON 5.0-10.0))

#include "HIOStream.h"
#if !defined(USE_IOSTREAM_H)
using namespace std;
#endif
#include "HalconCpp.h"

main()
{
  cout << "Reproduction of 'dilation_rectangle ()'" << endl;
  cout << "First = original image " << endl;
  cout << "Blue  = after dilation " << endl;
  cout << "Red   = after segmentation " << endl;

  HByteImage img("monkey");
  HWindow    w;

  HRegionArray regs   = (img >= 220).Connection();
  HRegionArray dilreg = regs.DilationRectangle1 (2, 4);

                        img.Display (w);      w.Click ();
  w.SetColor ("blue");  dilreg.Display (w);   w.Click ();
  w.SetColor ("red");   regs.Display (w);     w.Click ();

  return(0);
}

Example (C++ (HALCON 5.0-10.0))

#include "HIOStream.h"
#if !defined(USE_IOSTREAM_H)
using namespace std;
#endif
#include "HalconCpp.h"

main()
{
  cout << "Reproduction of 'dilation_rectangle ()'" << endl;
  cout << "First = original image " << endl;
  cout << "Blue  = after dilation " << endl;
  cout << "Red   = after segmentation " << endl;

  HByteImage img("monkey");
  HWindow    w;

  HRegionArray regs   = (img >= 220).Connection();
  HRegionArray dilreg = regs.DilationRectangle1 (2, 4);

                        img.Display (w);      w.Click ();
  w.SetColor ("blue");  dilreg.Display (w);   w.Click ();
  w.SetColor ("red");   regs.Display (w);     w.Click ();

  return(0);
}

Complexity

Let F1 be the area of an input region and H be the height of the rectangle. Then the runtime complexity for one region is:

Result

dilation_rectangle1dilation_rectangle1DilationRectangle1DilationRectangle1DilationRectangle1dilation_rectangle1 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

thresholdthresholdThresholdThresholdThresholdthreshold, regiongrowingregiongrowingRegiongrowingRegiongrowingRegiongrowingregiongrowing, connectionconnectionConnectionConnectionConnectionconnection, union1union1Union1Union1Union1union1, watershedswatershedsWatershedsWatershedsWatershedswatersheds, class_ndim_normclass_ndim_normClassNdimNormClassNdimNormClassNdimNormclass_ndim_norm

Possible Successors

reduce_domainreduce_domainReduceDomainReduceDomainReduceDomainreduce_domain, select_shapeselect_shapeSelectShapeSelectShapeSelectShapeselect_shape, area_centerarea_centerAreaCenterAreaCenterAreaCenterarea_center, connectionconnectionConnectionConnectionConnectionconnection

Alternatives

minkowski_add1minkowski_add1MinkowskiAdd1MinkowskiAdd1MinkowskiAdd1minkowski_add1, minkowski_add2minkowski_add2MinkowskiAdd2MinkowskiAdd2MinkowskiAdd2minkowski_add2, expand_regionexpand_regionExpandRegionExpandRegionExpandRegionexpand_region, dilation1dilation1Dilation1Dilation1Dilation1dilation1, dilation2dilation2Dilation2Dilation2Dilation2dilation2, dilation_circledilation_circleDilationCircleDilationCircleDilationCircledilation_circle

Module

Foundation

Operators

dilation_rectangle1dilation_rectangle1DilationRectangle1DilationRectangle1dilation_rectangle1 (Operator)

Name

Signature

Description

Attention

Execution Information

Parameters

Example (C++ (HALCON 5.0-10.0))

Example (C)

Example (C++ (HALCON 5.0-10.0))

Example (C++ (HALCON 5.0-10.0))

Example (C++ (HALCON 5.0-10.0))

Complexity

Result

Possible Predecessors

Possible Successors

Alternatives

See also

Module