ITK  5.0.0
Insight Segmentation and Registration Toolkit
WikiExamples/Iterators/ImageRegionIterator.cxx
#include "itkImage.h"
#include "vtkVersion.h"
#include "vtkImageViewer.h"
#include "vtkImageMapper3D.h"
#include "vtkRenderWindowInteractor.h"
#include "vtkSmartPointer.h"
#include "vtkImageActor.h"
#include "vtkInteractorStyleImage.h"
#include "vtkRenderer.h"
int main(int argc, char*argv[])
{
if(argc < 2)
{
std::cerr << "Required: 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]);
reader->Update();
ImageType::Pointer image = reader->GetOutput();
ImageType::SizeType regionSize;
regionSize[0] = 5;
regionSize[1] = 4;
ImageType::IndexType regionIndex;
regionIndex[0] = 0;
regionIndex[1] = 0;
region.SetSize(regionSize);
region.SetIndex(regionIndex);
itk::ImageRegionIterator<ImageType> imageIterator(image,region);
while(!imageIterator.IsAtEnd())
{
// Get the value of the current pixel
//unsigned char val = imageIterator.Get();
//std::cout << (int)val << std::endl;
// Set the current pixel to white
imageIterator.Set(255);
++imageIterator;
}
// Visualize
ConnectorType::Pointer connector = ConnectorType::New();
connector->SetInput(image);
vtkSmartPointer<vtkImageActor> actor =
vtkSmartPointer<vtkImageActor>::New();
#if VTK_MAJOR_VERSION <= 5
actor->SetInput(connector->GetOutput());
#else
connector->Update();
actor->GetMapper()->SetInputData(connector->GetOutput());
#endif
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;
}