ITK/Examples/Smoothing/MedianImageFilter

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< ITK‎ | Examples
Revision as of 22:25, 15 November 2010 by Lorensen (talk | contribs) (Now uses locked cameras.)
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MedianImageFilter.cxx

<source lang="cpp">

  1. include "itkImage.h"
  2. include "itkImageFileReader.h"
  3. include "itkMedianImageFilter.h"
  1. include <itkImageToVTKImageFilter.h>
  1. include "vtkImageViewer.h"
  2. include "vtkRenderWindowInteractor.h"
  3. include "vtkSmartPointer.h"
  4. include "vtkImageActor.h"
  5. include "vtkInteractorStyleImage.h"
  6. include "vtkRenderer.h"
  7. include "vtkCamera.h"

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

 // Verify command line arguments
 if( argc < 2 )
   {
   std::cerr << "Usage: " << std::endl;
   std::cerr << argv[0] << "inputImageFile" << std::endl;
   return EXIT_FAILURE;
   }
 // Parse command line arguments
 std::string inputFilename = argv[1];
 // Setup types
 typedef itk::Image< unsigned char, 2 >                 UnsignedCharImageType;
 typedef itk::ImageFileReader< UnsignedCharImageType >  readerType;
 typedef itk::MedianImageFilter<
   UnsignedCharImageType, UnsignedCharImageType >       filterType;
 // Create and setup a reader
 readerType::Pointer reader = readerType::New();
 reader->SetFileName( inputFilename.c_str() );
 // Create and setup a median filter
 filterType::Pointer medianFilter = filterType::New();
 medianFilter->SetInput( reader->GetOutput() );
 // Visualize the original image
 typedef itk::ImageToVTKImageFilter<UnsignedCharImageType> ConnectorType;
 ConnectorType::Pointer originalConnector = ConnectorType::New();
 originalConnector->SetInput(reader->GetOutput());
 vtkSmartPointer<vtkImageActor> originalActor =
   vtkSmartPointer<vtkImageActor>::New();
 originalActor->SetInput(originalConnector->GetOutput());
 // Visualize the filtered image
 typedef itk::ImageToVTKImageFilter<UnsignedCharImageType> ConnectorType;
 ConnectorType::Pointer filteredConnector = ConnectorType::New();
 filteredConnector->SetInput(medianFilter->GetOutput());
 vtkSmartPointer<vtkImageActor> filteredActor =
   vtkSmartPointer<vtkImageActor>::New();
 filteredActor->SetInput(filteredConnector->GetOutput());
 // Define viewport ranges
 // (xmin, ymin, xmax, ymax)
 double leftViewport[4] = {0.0, 0.0, 0.5, 1.0};
 double rightViewport[4] = {0.5, 0.0, 1.0, 1.0};
 // Setup both renderers
 vtkSmartPointer<vtkRenderWindow> renderWindow =
   vtkSmartPointer<vtkRenderWindow>::New();
 renderWindow->SetSize(600,300);
 vtkSmartPointer<vtkRenderer> leftRenderer =
   vtkSmartPointer<vtkRenderer>::New();
 renderWindow->AddRenderer(leftRenderer);
 leftRenderer->SetViewport(leftViewport);
 vtkSmartPointer<vtkRenderer> rightRenderer =
   vtkSmartPointer<vtkRenderer>::New();
 renderWindow->AddRenderer(rightRenderer);
 rightRenderer->SetViewport(rightViewport);
 leftRenderer->AddActor(originalActor);
 rightRenderer->AddActor(filteredActor);
 leftRenderer->ResetCamera();
 rightRenderer->SetActiveCamera(leftRenderer->GetActiveCamera());
 vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
   vtkSmartPointer<vtkRenderWindowInteractor>::New();
 vtkSmartPointer<vtkInteractorStyleImage> style =
   vtkSmartPointer<vtkInteractorStyleImage>::New();
 renderWindowInteractor->SetInteractorStyle(style);
 renderWindowInteractor->SetRenderWindow(renderWindow);
 renderWindowInteractor->Initialize();
 renderWindowInteractor->Start();
 return EXIT_SUCCESS;

} </source>

CMakeLists.txt

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

PROJECT(MedianImageFilter)

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

</source>