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ImageContinuousDilate3D

vtk-examples/Cxx/Images/ImageContinuousDilate3D


Question

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Code

ImageContinuousDilate3D.cxx

#include <vtkActor.h>
#include <vtkDataSetMapper.h>
#include <vtkImageActor.h>
#include <vtkImageCanvasSource2D.h>
#include <vtkImageContinuousDilate3D.h>
#include <vtkImageData.h>
#include <vtkNamedColors.h>
#include <vtkNew.h>
#include <vtkPNGReader.h>
#include <vtkProperty.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkRenderer.h>

#include <array>

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

  vtkNew<vtkImageData> image;

  if (argc < 2)
  {
    std::array<double, 3> drawColor1{0, 0, 0};
    std::array<double, 3> drawColor2{0, 0, 0};
    auto color1 = colors->GetColor3ub("Black").GetData();
    auto color2 = colors->GetColor3ub("Red").GetData();
    for (auto i = 0; i < 3; ++i)
    {
      drawColor1[i] = color1[i];
      drawColor2[i] = color2[i];
    }

    // Create an image
    vtkNew<vtkImageCanvasSource2D> source;
    source->SetScalarTypeToUnsignedChar();
    source->SetExtent(0, 200, 0, 200, 0, 0);
    source->SetDrawColor(drawColor1.data());
    source->FillBox(0, 200, 0, 200);
    source->SetDrawColor(drawColor2.data());
    source->FillBox(100, 150, 100, 150);
    source->Update();
    image->ShallowCopy(source->GetOutput());
  }
  else
  {
    vtkNew<vtkPNGReader> reader;
    reader->SetFileName(argv[1]);
    reader->Update();
    image->ShallowCopy(reader->GetOutput());
  }

  vtkNew<vtkImageContinuousDilate3D> dilateFilter;
  dilateFilter->SetInputData(image);
  dilateFilter->SetKernelSize(10, 10, 1);
  dilateFilter->Update();

  vtkNew<vtkDataSetMapper> originalMapper;
  originalMapper->SetInputData(image);
  originalMapper->Update();

  vtkNew<vtkActor> originalActor;
  originalActor->SetMapper(originalMapper);

  vtkNew<vtkDataSetMapper> dilatedMapper;
  dilatedMapper->SetInputConnection(dilateFilter->GetOutputPort());
  dilatedMapper->Update();

  vtkNew<vtkActor> dilatedActor;
  dilatedActor->SetMapper(dilatedMapper);

  // Visualize
  double leftViewport[4] = {0.0, 0.0, 0.5, 1.0};
  double rightViewport[4] = {0.5, 0.0, 1.0, 1.0};

  vtkNew<vtkRenderWindow> renderWindow;
  renderWindow->SetSize(600, 300);
  renderWindow->SetWindowName("ImageContinuousDilate3D");

  vtkNew<vtkRenderWindowInteractor> interactor;
  interactor->SetRenderWindow(renderWindow);

  vtkNew<vtkRenderer> leftRenderer;
  renderWindow->AddRenderer(leftRenderer);
  leftRenderer->SetViewport(leftViewport);
  leftRenderer->SetBackground(colors->GetColor3d("Sienna").GetData());

  vtkNew<vtkRenderer> rightRenderer;
  renderWindow->AddRenderer(rightRenderer);
  rightRenderer->SetViewport(rightViewport);
  rightRenderer->SetBackground(colors->GetColor3d("RoyalBlue").GetData());

  leftRenderer->AddActor(originalActor);
  rightRenderer->AddActor(dilatedActor);

  leftRenderer->ResetCamera();
  rightRenderer->SetActiveCamera(leftRenderer->GetActiveCamera());

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

  return EXIT_SUCCESS;
}

CMakeLists.txt

cmake_minimum_required(VERSION 3.3 FATAL_ERROR)

project(ImageContinuousDilate3D)

find_package(VTK COMPONENTS 
  vtkCommonColor
  vtkCommonCore
  vtkCommonDataModel
  vtkIOImage
  vtkImagingMorphological
  vtkImagingSources
  vtkInteractionStyle
  vtkRenderingContextOpenGL2
  vtkRenderingCore
  vtkRenderingFreeType
  vtkRenderingGL2PSOpenGL2
  vtkRenderingOpenGL2
  QUIET
)

if (NOT VTK_FOUND)
  message("Skipping ImageContinuousDilate3D: ${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(ImageContinuousDilate3D MACOSX_BUNDLE ImageContinuousDilate3D.cxx )
  target_link_libraries(ImageContinuousDilate3D PRIVATE ${VTK_LIBRARIES})
else ()
  # include all components
  add_executable(ImageContinuousDilate3D MACOSX_BUNDLE ImageContinuousDilate3D.cxx )
  target_link_libraries(ImageContinuousDilate3D PRIVATE ${VTK_LIBRARIES})
  # vtk_module_autoinit is needed
  vtk_module_autoinit(
    TARGETS ImageContinuousDilate3D
    MODULES ${VTK_LIBRARIES}
    )
endif ()

Download and Build ImageContinuousDilate3D

Click here to download ImageContinuousDilate3D and its CMakeLists.txt file. Once the tarball ImageContinuousDilate3D.tar has been downloaded and extracted,

cd ImageContinuousDilate3D/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:

./ImageContinuousDilate3D

WINDOWS USERS

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