ReadImageData

VTKExamples/Cxx/IO/ReadImageData


Description

This example reads an image data (.vti) file.

Code

ReadImageData.cxx

#include <vtkSmartPointer.h>
#include <vtkProperty.h>
#include <vtkDataSetMapper.h>
#include <vtkImageActor.h>
#include <vtkImageViewer2.h>
#include <vtkXMLImageDataReader.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkRenderer.h>

int main(int argc, char* argv[])
{
  // Verify input arguments
  if(argc != 2)
  {
    std::cout << "Usage: " << argv[0]
              << " Filename.vti" << std::endl;
    return EXIT_FAILURE;
  }

  std::string inputFilename = argv[1];

  // Read the file
  vtkSmartPointer<vtkXMLImageDataReader> reader =
    vtkSmartPointer<vtkXMLImageDataReader>::New();
  reader->SetFileName(inputFilename.c_str());
  reader->Update();

  // Visualize
  vtkSmartPointer<vtkDataSetMapper> mapper =
    vtkSmartPointer<vtkDataSetMapper>::New();
  mapper->SetInputConnection(reader->GetOutputPort());

  vtkSmartPointer<vtkActor> actor =
    vtkSmartPointer<vtkActor>::New();
  actor->SetMapper(mapper);
  actor->GetProperty()->SetRepresentationToWireframe();

  vtkSmartPointer<vtkRenderer> renderer =
    vtkSmartPointer<vtkRenderer>::New();
  renderer->AddActor(actor);
  renderer->ResetCamera();
  renderer->SetBackground(1,1,1);

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

  vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
    vtkSmartPointer<vtkRenderWindowInteractor>::New();
  renderWindowInteractor->SetRenderWindow(renderWindow);
  renderWindowInteractor->Initialize();

  renderWindowInteractor->Start();

  return EXIT_SUCCESS;
}

CMakeLists.txt

cmake_minimum_required(VERSION 2.8)

PROJECT(ReadImageData)

find_package(VTK REQUIRED)
include(${VTK_USE_FILE})

add_executable(ReadImageData MACOSX_BUNDLE ReadImageData.cxx )

target_link_libraries(ReadImageData ${VTK_LIBRARIES})

Download and Build ReadImageData

Click here to download ReadImageData and its CMakeLists.txt file. Once the tarball ReadImageData.tar has been downloaded and extracted,

cd ReadImageData/build 

If VTK is installed:

cmake ..

If VTK is not installed but compiled on your system, you will need to specify the path to your VTK build:

cmake -DVTK_DIR:PATH=/home/me/vtk_build ..

Build the project:

make

and run it:

./ReadImageData

WINDOWS USERS

Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.