MetaImageWriter

VTKEx/Cxx/IO/MetaImageWriter

Other languages

See (CSharp)

Question

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Code

MetaImageWriter.cxx

// some standard vtk headers
#include <vtkSmartPointer.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkRenderer.h>

// headers needed for this example
#include <vtkImageData.h>
#include <vtkImageMapper3D.h>
#include <vtkImageCast.h>
#include <vtkMetaImageWriter.h>
#include <vtkMetaImageReader.h>
#include <vtkImageMandelbrotSource.h>
#include <vtkImageActor.h>

int main(int, char *[])
{
   // adapt path !
   std::string filePath = "julia_mha.mhd";
   std::string filePathRaw = "julia_mha.raw";
   // Create an image
   vtkSmartPointer<vtkImageMandelbrotSource> source =
      vtkSmartPointer<vtkImageMandelbrotSource>::New();

   vtkSmartPointer<vtkImageCast> castFilter = 
      vtkSmartPointer<vtkImageCast>::New();
   castFilter->SetOutputScalarTypeToUnsignedChar();
   castFilter->SetInputConnection(source->GetOutputPort());
   castFilter->Update();

   vtkSmartPointer<vtkMetaImageWriter> writer =
      vtkSmartPointer<vtkMetaImageWriter>::New();
   writer->SetInputConnection(castFilter->GetOutputPort());
   writer->SetFileName(filePath.c_str());
   writer->SetRAWFileName(filePathRaw.c_str());
   writer->Write();

   // Read and display file for verification that it was written correctly
   vtkSmartPointer<vtkMetaImageReader> reader = 
      vtkSmartPointer<vtkMetaImageReader>::New();
   reader->SetFileName(filePath.c_str());
   reader->Update();

   vtkSmartPointer<vtkImageActor> actor =
      vtkSmartPointer<vtkImageActor>::New();
   actor->GetMapper()->SetInputConnection(reader->GetOutputPort());

   vtkSmartPointer<vtkRenderer> renderer =
      vtkSmartPointer<vtkRenderer>::New();
   vtkSmartPointer<vtkRenderWindow> renderWindow =
      vtkSmartPointer<vtkRenderWindow>::New();
   renderWindow->AddRenderer(renderer);
   vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
      vtkSmartPointer<vtkRenderWindowInteractor>::New();
   renderWindowInteractor->SetRenderWindow(renderWindow);

   renderer->AddActor(actor);
   renderer->SetBackground(.2, .3, .4);

   renderWindow->Render();
   renderWindowInteractor->Start();

   return EXIT_SUCCESS;
}

CMakeLists.txt

cmake_minimum_required(VERSION 3.3 FATAL_ERROR)

project(MetaImageWriter)

find_package(VTK COMPONENTS 
  vtkvtkCommonCore
  vtkvtkCommonDataModel
  vtkvtkIOImage
  vtkvtkImagingCore
  vtkvtkImagingSources
  vtkvtkInteractionStyle
  vtkvtkRenderingContextOpenGL2
  vtkvtkRenderingCore
  vtkvtkRenderingFreeType
  vtkvtkRenderingGL2PSOpenGL2
  vtkvtkRenderingOpenGL2 QUIET)
if (NOT VTK_FOUND)
  message("Skipping MetaImageWriter: ${VTK_NOT_FOUND_MESSAGE}")
  return ()
endif()
message (STATUS "VTK_VERSION: ${VTK_VERSION}")
if (VTK_VERSION VERSION_LESS "8.90.0")
  # old system
  include(${VTK_USE_FILE})
  add_executable(MetaImageWriter MACOSX_BUNDLE MetaImageWriter.cxx )
  target_link_libraries(MetaImageWriter PRIVATE ${VTK_LIBRARIES})
else ()
  # include all components
  add_executable(MetaImageWriter MACOSX_BUNDLE MetaImageWriter.cxx )
  target_link_libraries(MetaImageWriter PRIVATE ${VTK_LIBRARIES})
  # vtk_module_autoinit is needed
  vtk_module_autoinit(
    TARGETS MetaImageWriter
    MODULES ${VTK_LIBRARIES}
    )
endif ()

Download and Build MetaImageWriter

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

cd MetaImageWriter/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:

./MetaImageWriter

WINDOWS USERS

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