ITK/Examples/ImageProcessing/AbsImageFilter: Difference between revisions

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(CreateImage must be static to avoid duplicate symbols in test driver.)
(Use QuickView)
Line 6: Line 6:
#include "itkAbsImageFilter.h"
#include "itkAbsImageFilter.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"
#include "vtkCamera.h"


typedef itk::Image<unsigned char, 2>  UnsignedCharImageType;
typedef itk::Image<unsigned char, 2>  UnsignedCharImageType;
Line 25: Line 17:
   FloatImageType::Pointer image = FloatImageType::New();
   FloatImageType::Pointer image = FloatImageType::New();
   CreateImage(image);
   CreateImage(image);
  // Rescale the image so that it can be displayed
  typedef itk::RescaleIntensityImageFilter< FloatImageType, UnsignedCharImageType > FloatRescaleCastFilterType;
  FloatRescaleCastFilterType::Pointer rescaleFilter = FloatRescaleCastFilterType::New();
  rescaleFilter->SetInput(image);
  rescaleFilter->SetOutputMinimum(0);
  rescaleFilter->SetOutputMaximum(255);
  rescaleFilter->Update();


   // Take the absolute value of the image
   // Take the absolute value of the image
   typedef itk::AbsImageFilter <FloatImageType, UnsignedCharImageType>
   typedef itk::AbsImageFilter <FloatImageType, FloatImageType>
           AbsImageFilterType;
           AbsImageFilterType;


Line 41: Line 25:
           = AbsImageFilterType::New ();
           = AbsImageFilterType::New ();
   absFilter->SetInput(image);
   absFilter->SetInput(image);
  absFilter->Update();
  typedef itk::RescaleIntensityImageFilter< UnsignedCharImageType, UnsignedCharImageType > RescaleFilterType;
  RescaleFilterType::Pointer absRescaleFilter = RescaleFilterType::New();
  absRescaleFilter->SetInput(absFilter->GetOutput());
  absRescaleFilter->SetOutputMinimum(0);
  absRescaleFilter->SetOutputMaximum(255);
  absRescaleFilter->Update();
  // Visualize input image
  typedef itk::ImageToVTKImageFilter<UnsignedCharImageType> ConnectorType;
  ConnectorType::Pointer originalConnector = ConnectorType::New();
  originalConnector->SetInput(rescaleFilter->GetOutput());
  vtkSmartPointer<vtkImageActor> actor =
    vtkSmartPointer<vtkImageActor>::New();
  actor->SetInput(originalConnector->GetOutput());
  // Visualize abs image
  ConnectorType::Pointer absConnector = ConnectorType::New();
  absConnector->SetInput(absRescaleFilter->GetOutput());
  vtkSmartPointer<vtkImageActor> absActor =
    vtkSmartPointer<vtkImageActor>::New();
  absActor->SetInput(absConnector->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
  // (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<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(actor);
  rightRenderer->AddActor(absActor);
  leftRenderer->GetActiveCamera()->SetViewUp(0,-1,0);
  leftRenderer->ResetCamera();
  rightRenderer->GetActiveCamera()->SetViewUp(0,-1,0);
  rightRenderer->ResetCamera();
  renderWindow->Render();
  vtkSmartPointer<vtkInteractorStyleImage> style =
    vtkSmartPointer<vtkInteractorStyleImage>::New();
  interactor->SetInteractorStyle(style);


   interactor->Start();
   QuickView viewer;
  viewer.AddImage<FloatImageType>(image);
  viewer.AddImage<FloatImageType>(absFilter->GetOutput());
  viewer.Visualize();


   return EXIT_SUCCESS;
   return EXIT_SUCCESS;

Revision as of 00:30, 18 November 2010

AbsImageFilter.cxx

<source lang="cpp">

  1. include "itkImage.h"
  2. include "itkImageFileWriter.h"
  3. include "itkRescaleIntensityImageFilter.h"
  4. include "itkAbsImageFilter.h"
  1. include "QuickView.h"

typedef itk::Image<unsigned char, 2> UnsignedCharImageType; typedef itk::Image<float, 2> FloatImageType;

static void CreateImage(FloatImageType::Pointer image);

int main(int, char *[]) { 

 FloatImageType::Pointer image = FloatImageType::New();
 CreateImage(image);

 // Take the absolute value of the image
 typedef itk::AbsImageFilter <FloatImageType, FloatImageType>
         AbsImageFilterType;

 AbsImageFilterType::Pointer absFilter
         = AbsImageFilterType::New ();
 absFilter->SetInput(image);

 QuickView viewer;
 viewer.AddImage<FloatImageType>(image);
 viewer.AddImage<FloatImageType>(absFilter->GetOutput());
 viewer.Visualize();

 return EXIT_SUCCESS;

}

void CreateImage(FloatImageType::Pointer image) { 

 // Create an image with negative values
 FloatImageType::RegionType region;
 FloatImageType::IndexType start;
 start[0] = 0;
 start[1] = 0;

 FloatImageType::SizeType size;
 size[0] = 200;
 size[1] = 300;

 region.SetSize(size);
 region.SetIndex(start);

 image->SetRegions(region);
 image->Allocate();

 itk::ImageRegionIterator<FloatImageType> imageIterator(image,region);

 while(!imageIterator.IsAtEnd())
   {
   imageIterator.Set(imageIterator.GetIndex()[0] - imageIterator.GetIndex()[1]);
   ++imageIterator;
   }

} </source>

CMakeLists.txt

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

PROJECT(AbsImageFilter)

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

</source>

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