ITK  5.0.0
Insight Segmentation and Registration Toolkit
WikiExamples/ImageProcessing/RescaleIntensityImageFilter.cxx
#include "itkImage.h"
#include <cstdlib>
#include <iostream>
#include "vtkVersion.h"
#include "vtkImageViewer.h"
#include "vtkRenderWindowInteractor.h"
#include "vtkSmartPointer.h"
#include "vtkImageActor.h"
#include "vtkImageMapper3D.h"
#include "vtkInteractorStyleImage.h"
#include "vtkRenderer.h"
#include "vtkCamera.h"
int main(int argc, char *argv[])
{
if(argc < 2)
{
std::cerr << "Usage: " << argv[0] << " filename" << std::endl;
return EXIT_FAILURE;
}
using ImageType = itk::Image<unsigned char, 2>;
using ReaderType = itk::ImageFileReader<ImageType>;
ReaderType::Pointer reader = ReaderType::New();
reader->SetFileName(argv[1]);
ConnectorType::Pointer originalConnector = ConnectorType::New();
originalConnector->SetInput(reader->GetOutput());
vtkSmartPointer<vtkImageActor> originalActor =
vtkSmartPointer<vtkImageActor>::New();
#if VTK_MAJOR_VERSION <= 5
originalActor->SetInput(originalConnector->GetOutput());
#else
originalConnector->Update();
originalActor->GetMapper()->SetInputData(originalConnector->GetOutput());
#endif
RescaleFilterType::Pointer rescaleFilter = RescaleFilterType::New();
rescaleFilter->SetInput(reader->GetOutput());
rescaleFilter->SetOutputMinimum(0);
rescaleFilter->SetOutputMaximum(255);
ConnectorType::Pointer rescaledConnector = ConnectorType::New();
rescaledConnector->SetInput(rescaleFilter->GetOutput());
vtkSmartPointer<vtkImageActor> rescaledActor =
vtkSmartPointer<vtkImageActor>::New();
#if VTK_MAJOR_VERSION <= 5
rescaledActor->SetInput(rescaledConnector->GetOutput());
#else
rescaledConnector->Update();
rescaledActor->GetMapper()->SetInputData(rescaledConnector->GetOutput());
#endif
// There will be one render window
vtkSmartPointer<vtkRenderWindow> renderWindow =
vtkSmartPointer<vtkRenderWindow>::New();
renderWindow->SetSize(900, 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(originalActor);
rightRenderer->AddActor(rescaledActor);
vtkSmartPointer<vtkCamera> camera =
vtkSmartPointer<vtkCamera>::New();
leftRenderer->SetActiveCamera(camera);
rightRenderer->SetActiveCamera(camera);
leftRenderer->ResetCamera();
renderWindow->Render();
vtkSmartPointer<vtkInteractorStyleImage> style =
vtkSmartPointer<vtkInteractorStyleImage>::New();
interactor->SetInteractorStyle(style);
interactor->Start();
return EXIT_SUCCESS;
}