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MetaImageWriter

vtk-examples/Cxx/IO/MetaImageWriter


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Question

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Code

MetaImageWriter.cxx

#include <vtkNew.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkRenderer.h>
#include <vtkImageData.h>
#include <vtkImageMapper3D.h>
#include <vtkImageCast.h>
#include <vtkMetaImageWriter.h>
#include <vtkMetaImageReader.h>
#include <vtkImageMandelbrotSource.h>
#include <vtkImageActor.h>
#include <vtkNamedColors.h>
#include <vtkNew.h>

int main(int, char *[])
{
  vtkNew<vtkNamedColors> colors;

  // adapt path !
  std::string filePath = "julia_mha.mhd";
  std::string filePathRaw = "julia_mha.raw";
  // Create an image
  vtkNew<vtkImageMandelbrotSource> source;

  vtkNew<vtkImageCast> castFilter;
  castFilter->SetOutputScalarTypeToUnsignedChar();
  castFilter->SetInputConnection(source->GetOutputPort());
  castFilter->Update();

  vtkNew<vtkMetaImageWriter> writer;
  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
  vtkNew<vtkMetaImageReader> reader;
  reader->SetFileName(filePath.c_str());
  reader->Update();

  vtkNew<vtkImageActor> actor;
  actor->GetMapper()->SetInputConnection(reader->GetOutputPort());

  vtkNew<vtkRenderer> renderer;
  vtkNew<vtkRenderWindow> renderWindow;
  renderWindow->AddRenderer(renderer);
  vtkNew<vtkRenderWindowInteractor> renderWindowInteractor;
  renderWindowInteractor->SetRenderWindow(renderWindow);

  renderer->AddActor(actor);
  renderer->SetBackground(colors->GetColor3d("SteelBlue").GetData());

  renderWindow->SetWindowName("MetaImageWriter");
  renderWindow->Render();
  renderWindowInteractor->Start();

   return EXIT_SUCCESS;
}

CMakeLists.txt

cmake_minimum_required(VERSION 3.3 FATAL_ERROR)

project(MetaImageWriter)

find_package(VTK COMPONENTS 
  vtkCommonColor
  vtkCommonCore
  vtkCommonDataModel
  vtkIOImage
  vtkImagingCore
  vtkImagingSources
  vtkInteractionStyle
  vtkRenderingContextOpenGL2
  vtkRenderingCore
  vtkRenderingFreeType
  vtkRenderingGL2PSOpenGL2
  vtkRenderingOpenGL2
  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.