Display ITK Image

Synopsis

Display an ITK iamge.

Results

Note

Help Wanted Implementation of Results for sphinx examples containing this message. Reconfiguration of CMakeList.txt may be necessary. Write An Example <https://itk.org/ITKExamples/Documentation/Contribute/WriteANewExample.html>

Code

C++

#include <itkImage.h>
#include <itkImageFileReader.h>

#include <itkImageToVTKImageFilter.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"
#include "itkRGBPixel.h"
int
main(int argc, char * argv[])
{
  if (argc < 2)
  {
    std::cerr << "Usage: " << std::endl;
    std::cerr << argv[0] << " inputImageFile" << std::endl;
    return EXIT_FAILURE;
  }

  using ImageType = itk::Image<itk::RGBPixel<unsigned char>, 2>;
  using ReaderType = itk::ImageFileReader<ImageType>;
  using ConnectorType = itk::ImageToVTKImageFilter<ImageType>;

  ReaderType::Pointer    reader = ReaderType::New();
  ConnectorType::Pointer connector = ConnectorType::New();

  reader->SetFileName(argv[1]);
  connector->SetInput(reader->GetOutput());

  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<vtkRenderer> renderer = vtkSmartPointer<vtkRenderer>::New();
  renderer->AddActor(actor);
  renderer->ResetCamera();

  vtkSmartPointer<vtkRenderWindow> renderWindow = vtkSmartPointer<vtkRenderWindow>::New();
  renderWindow->AddRenderer(renderer);

  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;
}

Classes demonstrated

template<typename TInputImage>
class ImageToVTKImageFilter : public itk::ProcessObject

Converts an ITK image into a VTK image and plugs a itk data pipeline to a VTK datapipeline.

This class puts together an itkVTKImageExporter and a vtkImageImporter. It takes care of the details related to the connection of ITK and VTK pipelines. The User will perceive this filter as an adaptor to which an itk::Image can be plugged as input and a vtkImage is produced as output.

ITK Sphinx Examples:

• All ITK Sphinx Examples

• Convert an itk::Image to vtkImageData in a pipeline

• Convert RGB vtkImageData to an itk::Image

See itk::ImageToVTKImageFilter for additional documentation.