ITK/Examples/Morphology/FlatStructuringElement: Difference between revisions

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<source lang="cpp">
<source lang="cpp">
#include "itkImage.h"
#include "itkImage.h"
#include "itkRescaleIntensityImageFilter.h"
#include "itkBinaryErodeImageFilter.h"
#include "itkBinaryErodeImageFilter.h"
#include "itkBinaryThresholdImageFilter.h"
#include "itkImageFileReader.h"
#include <itkImageFileReader.h>
#include "itkBinaryBallStructuringElement.h"
#include <itkBinaryBallStructuringElement.h>


#include <itkImageToVTKImageFilter.h>
#include "QuickView.h"
 
#include "vtkImageViewer.h"
#include "vtkRenderWindowInteractor.h"
#include "vtkSmartPointer.h"
#include "vtkImageActor.h"
#include "vtkInteractorStyleImage.h"
#include "vtkRenderer.h"


int main(int argc, char *argv[])
int main(int argc, char *argv[])
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   if(argc < 2)
   if(argc < 2)
     {
     {
     std::cerr << "Required: filename" << std::endl;
     std::cerr << argv[0] << " InputImageFile [radius]" << std::endl;
     return EXIT_FAILURE;
     return EXIT_FAILURE;
     }
     }


   typedef itk::Image<unsigned char, 2> ImageType;
  unsigned int radius = 2;
  if (argc > 2)
    {
    radius = atoi(argv[2]);
    }
 
   typedef itk::Image<unsigned char, 2>   ImageType;
   typedef itk::ImageFileReader<ImageType> ReaderType;
   typedef itk::ImageFileReader<ImageType> ReaderType;
   ReaderType::Pointer reader = ReaderType::New();
   ReaderType::Pointer reader = ReaderType::New();
   reader->SetFileName(argv[1]);
   reader->SetFileName(argv[1]);
  reader->Update();
    
    
   typedef itk::FlatStructuringElement<2> StructuringElementType;
   typedef itk::FlatStructuringElement<2> StructuringElementType;
   StructuringElementType::RadiusType radius;
   StructuringElementType::RadiusType elementRadius;
   radius.Fill(3);
   elementRadius.Fill(3);


   StructuringElementType structuringElement = StructuringElementType::Box(radius);
   StructuringElementType structuringElement = StructuringElementType::Box(elementRadius);


   typedef itk::BinaryErodeImageFilter <ImageType, ImageType, StructuringElementType>
   typedef itk::BinaryErodeImageFilter <ImageType, ImageType, StructuringElementType>
          BinaryErodeImageFilterType;
    BinaryErodeImageFilterType;


   BinaryErodeImageFilterType::Pointer erodeFilter
   BinaryErodeImageFilterType::Pointer erodeFilter
          = BinaryErodeImageFilterType::New();
    = BinaryErodeImageFilterType::New();
   erodeFilter->SetInput(reader->GetOutput());
   erodeFilter->SetInput(reader->GetOutput());
   erodeFilter->SetKernel(structuringElement);
   erodeFilter->SetKernel(structuringElement);
   erodeFilter->SetErodeValue(255);
   erodeFilter->SetErodeValue(255);
  erodeFilter->Update();
  // Visualize first image
  typedef itk::ImageToVTKImageFilter<ImageType> ConnectorType;
  ConnectorType::Pointer originalConnector = ConnectorType::New();
  originalConnector->SetInput(reader->GetOutput());
  vtkSmartPointer<vtkImageActor> originalActor =
    vtkSmartPointer<vtkImageActor>::New();
  originalActor->SetInput(originalConnector->GetOutput());
  // Visualize padded image
  ConnectorType::Pointer erodedConnector = ConnectorType::New();
  erodedConnector->SetInput(erodeFilter->GetOutput());
  vtkSmartPointer<vtkImageActor> erodedActor =
    vtkSmartPointer<vtkImageActor>::New();
  erodedActor->SetInput(erodedConnector->GetOutput());
  // There will be one render window
  vtkSmartPointer<vtkRenderWindow> renderWindow =
    vtkSmartPointer<vtkRenderWindow>::New();
  renderWindow->SetSize(600, 300);
  vtkSmartPointer<vtkRenderWindowInteractor> interactor =
    vtkSmartPointer<vtkRenderWindowInteractor>::New();
  interactor->SetRenderWindow(renderWindow);


   // Define viewport ranges
   QuickView viewer;
  // (xmin, ymin, xmax, ymax)
   viewer.AddImage(reader->GetOutput());
  double leftViewport[4] = {0.0, 0.0, 0.5, 1.0};
   viewer.AddImage(erodeFilter->GetOutput());
   double rightViewport[4] = {0.5, 0.0, 1.0, 1.0};
   viewer.Visualize();
 
  // Setup both renderers
  vtkSmartPointer<vtkRenderer> leftRenderer =
    vtkSmartPointer<vtkRenderer>::New();
  renderWindow->AddRenderer(leftRenderer);
  leftRenderer->SetViewport(leftViewport);
   leftRenderer->SetBackground(.6, .5, .4);
 
  vtkSmartPointer<vtkRenderer> rightRenderer =
    vtkSmartPointer<vtkRenderer>::New();
  renderWindow->AddRenderer(rightRenderer);
  rightRenderer->SetViewport(rightViewport);
   rightRenderer->SetBackground(.4, .5, .6);
 
  // Add the sphere to the left and the cube to the right
  leftRenderer->AddActor(originalActor);
  rightRenderer->AddActor(erodedActor);
 
  leftRenderer->ResetCamera();
  rightRenderer->ResetCamera();
 
  renderWindow->Render();
 
  vtkSmartPointer<vtkInteractorStyleImage> style =
    vtkSmartPointer<vtkInteractorStyleImage>::New();
  interactor->SetInteractorStyle(style);
 
  interactor->Start();


   return EXIT_SUCCESS;
   return EXIT_SUCCESS;
}
}
</source>
</source>


Revision as of 20:59, 15 December 2010

Create a structuring element (kernel) that can be used for any of the morphology filters.

FlatStructuringElement.cxx

<source lang="cpp">

  1. include "itkImage.h"
  2. include "itkBinaryErodeImageFilter.h"
  3. include "itkImageFileReader.h"
  4. include "itkBinaryBallStructuringElement.h"
  1. include "QuickView.h"

int main(int argc, char *argv[]) { 

 if(argc < 2)
   {
   std::cerr << argv[0] << " InputImageFile [radius]" << std::endl;
   return EXIT_FAILURE;
   }

 unsigned int radius = 2;
 if (argc > 2)
   {
   radius = atoi(argv[2]);
   }

 typedef itk::Image<unsigned char, 2>    ImageType;
 typedef itk::ImageFileReader<ImageType> ReaderType;
 ReaderType::Pointer reader = ReaderType::New();
 reader->SetFileName(argv[1]);
 
 typedef itk::FlatStructuringElement<2> StructuringElementType;
 StructuringElementType::RadiusType elementRadius;
 elementRadius.Fill(3);

 StructuringElementType structuringElement = StructuringElementType::Box(elementRadius);

 typedef itk::BinaryErodeImageFilter <ImageType, ImageType, StructuringElementType>
   BinaryErodeImageFilterType;

 BinaryErodeImageFilterType::Pointer erodeFilter
   = BinaryErodeImageFilterType::New();
 erodeFilter->SetInput(reader->GetOutput());
 erodeFilter->SetKernel(structuringElement);
 erodeFilter->SetErodeValue(255);

 QuickView viewer;
 viewer.AddImage(reader->GetOutput());
 viewer.AddImage(erodeFilter->GetOutput());
 viewer.Visualize();

 return EXIT_SUCCESS;

} </source>

CMakeLists.txt

<source lang="cmake"> cmake_minimum_required(VERSION 2.6)

PROJECT(FlatStructuringElement)

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(FlatStructuringElement FlatStructuringElement.cxx) TARGET_LINK_LIBRARIES(FlatStructuringElement vtkHybrid ITKBasicFilters ITKCommon ITKIO)

</source>

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