ITK/Examples/Functions/NeighborhoodOperatorImageFunction: Difference between revisions

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(Created page with "==NeighborhoodOperatorImageFunction.cxx== <source lang="cpp"> #include "itkImage.h" #include "itkNeighborhoodOperatorImageFunction.h" #include "itkNeighborhoodOperator.h" #includ...")
 
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==NeighborhoodOperatorImageFunction.cxx==
{{warning|1=The media wiki content on this page is no longer maintainedThe examples presented on the https://itk.org/Wiki/*  pages likely require ITK version 4.13 or earlier releasesIn many cases, the examples on this page no longer conform to the best practices for modern ITK versions.
<source lang="cpp">
}}
#include "itkImage.h"
#include "itkNeighborhoodOperatorImageFunction.h"
#include "itkNeighborhoodOperator.h"
#include "itkNeighborhoodAllocator.h"
 
#include <itkImageToVTKImageFilter.h>
 
#include "vtkImageViewer.h"
#include "vtkRenderWindowInteractor.h"
#include "vtkSmartPointer.h"
#include "vtkImageActor.h"
#include "vtkInteractorStyleImage.h"
#include "vtkRenderer.h"
 
typedef itk::Image<unsigned char, 2> ImageType;
 
void CreateImage(ImageType::Pointer image);
 
class CustomOperator
: public itk::NeighborhoodOperator<unsigned char, 2>
{
  // Count the number of valid neighbors and set the output pixel to that number.
  // What we should see is that the number of neighbors is constant in the "middle"
  // of the image and the number of neighbors is fewer on the edges.
};
 
int main(int, char*[])
{
 
  ImageType::Pointer image = ImageType::New();
  CreateImage(image);
 
  //CustomOperator customOperator;
  //itkNeighborhoodOperatorImageFunction function;
  //function->SetOperator(customOperator);
 
  // Visualize
  typedef itk::ImageToVTKImageFilter<ImageType> ConnectorType;
  ConnectorType::Pointer connector = ConnectorType::New();
  connector->SetInput(image);
 
  vtkSmartPointer<vtkImageActor> actor =
    vtkSmartPointer<vtkImageActor>::New();
  actor->SetInput(connector->GetOutput());
 
  vtkSmartPointer<vtkRenderWindow> renderWindow =
    vtkSmartPointer<vtkRenderWindow>::New();
 
  vtkSmartPointer<vtkRenderWindowInteractor> interactor =
    vtkSmartPointer<vtkRenderWindowInteractor>::New();
  interactor->SetRenderWindow(renderWindow);
 
  vtkSmartPointer<vtkRenderer> renderer =
    vtkSmartPointer<vtkRenderer>::New();
  renderWindow->AddRenderer(renderer);
 
  renderer->AddActor(actor);
  renderer->ResetCamera();
 
  renderWindow->Render();
 
  vtkSmartPointer<vtkInteractorStyleImage> style =
    vtkSmartPointer<vtkInteractorStyleImage>::New();
 
  interactor->SetInteractorStyle(style);
 
  interactor->Start();
 
  return EXIT_SUCCESS;
}
 
void CreateImage(ImageType::Pointer image)
{
  // Create an image with 2 connected components
  ImageType::RegionType region;
  ImageType::IndexType start;
  start[0] = 0;
  start[1] = 0;
 
  ImageType::SizeType size;
  unsigned int NumRows = 200;
  unsigned int NumCols = 300;
  size[0] = NumRows;
  size[1] = NumCols;
 
  region.SetSize(size);
  region.SetIndex(start);
 
  image->SetRegions(region);
  image->Allocate();
 
  // Make a square
   for(unsigned int r = 20; r < 80; r++)
  {
      for(unsigned int c = 20; c < 80; c++)
      {
          ImageType::IndexType pixelIndex;
          pixelIndex[0] = r;
          pixelIndex[1] = c;
 
          image->SetPixel(pixelIndex, 15);
      }
  }
}
</source>
 
==CMakeLists.txt==
<source lang="cmake">
cmake_minimum_required(VERSION 2.6)
 
PROJECT(NeighborhoodOperatorImageFunction)
 
include_directories(/home/doriad/src/ITK/Wrapping/WrapITK/ExternalProjects/ItkVtkGlue/src/)
FIND_PACKAGE(VTK REQUIRED)
INCLUDE(${VTK_USE_FILE})
 
FIND_PACKAGE(ITK REQUIRED)
INCLUDE(${ITK_USE_FILE})
 
ADD_EXECUTABLE(NeighborhoodOperatorImageFunction NeighborhoodOperatorImageFunction.cxx)
TARGET_LINK_LIBRARIES(NeighborhoodOperatorImageFunction vtkHybrid
ITKNumerics ITKBasicFilters ITKCommon ITKIO)
 
</source>

Latest revision as of 15:57, 4 June 2019

Warning: The media wiki content on this page is no longer maintained. The examples presented on the https://itk.org/Wiki/* pages likely require ITK version 4.13 or earlier releases. In many cases, the examples on this page no longer conform to the best practices for modern ITK versions.