Convert Triangle Mesh to Binary Image

Synopsis

Convert a triangular itk::Mesh to binary itk::Image

Results

Input 3D Image and Mesh

Output image

Code

C++

#include "itkMesh.h"
#include "itkMeshFileReader.h"

#include "itkImage.h"
#include "itkImageFileReader.h"
#include "itkImageFileWriter.h"

#include "itkCastImageFilter.h"
#include "itkTriangleMeshToBinaryImageFilter.h"

int
main(int argc, char * argv[])
{
  if (argc != 4)
  {
    std::cerr << "Usage: " << std::endl;
    std::cerr << argv[0];
    std::cerr << " <InputImageName> <InputMeshName> <OutputImageName>";
    std::cerr << std::endl;
    return EXIT_FAILURE;
  }

  const char * inputImageName = argv[1];
  const char * inputMeshName = argv[2];
  const char * outputImageName = argv[3];

  constexpr unsigned int Dimension = 3;
  using MeshPixelType = double;

  using MeshType = itk::Mesh<MeshPixelType, Dimension>;

  using MeshReaderType = itk::MeshFileReader<MeshType>;
  MeshReaderType::Pointer meshReader = MeshReaderType::New();
  meshReader->SetFileName(inputMeshName);

  using InputPixelType = unsigned char;
  using InputImageType = itk::Image<InputPixelType, Dimension>;
  using ImageReaderType = itk::ImageFileReader<InputImageType>;

  ImageReaderType::Pointer imageReader = ImageReaderType::New();
  imageReader->SetFileName(inputImageName);

  using OutputPixelType = unsigned char;
  using OutputImageType = itk::Image<OutputPixelType, Dimension>;

  using CastFilterType = itk::CastImageFilter<InputImageType, OutputImageType>;
  CastFilterType::Pointer cast = CastFilterType::New();
  cast->SetInput(imageReader->GetOutput());

  using FilterType = itk::TriangleMeshToBinaryImageFilter<MeshType, OutputImageType>;
  FilterType::Pointer filter = FilterType::New();
  filter->SetInput(meshReader->GetOutput());
  filter->SetInfoImage(cast->GetOutput());
  filter->SetInsideValue(itk::NumericTraits<OutputPixelType>::max());
  try
  {
    filter->Update();
  }
  catch (itk::ExceptionObject & error)
  {
    std::cerr << "Error: " << error << std::endl;
    return EXIT_FAILURE;
  }

  using WriterType = itk::ImageFileWriter<OutputImageType>;
  WriterType::Pointer writer = WriterType::New();
  writer->SetFileName(outputImageName);
  writer->SetInput(filter->GetOutput());
  try
  {
    writer->Update();
  }
  catch (itk::ExceptionObject & error)
  {
    std::cerr << "Error: " << error << std::endl;
    return EXIT_FAILURE;
  }

  return EXIT_SUCCESS;
}

Classes demonstrated

template<typename TInputMesh, typename TOutputImage>
class TriangleMeshToBinaryImageFilter : public itk::ImageSource<TOutputImage>

3D Rasterization algorithm Courtesy of Dr David Gobbi of Atamai Inc.

Author

Leila Baghdadi, MICe, Hospital for Sick Childern, Toronto, Canada,

See itk::TriangleMeshToBinaryImageFilter for additional documentation.