ImageDilateErode3D
VTKExamples/Cxx/Images/ImageDilateErode3D
Description¶
This example reads in a binary image and dilates one value and erodes another (morphological operations).
Code¶
ImageDilateErode3D.cxx
#include <vtkImageActor.h> #include <vtkImageCast.h> #include <vtkInteractorStyleImage.h> #include <vtkImageAccumulate.h> #include <vtkImageData.h> #include <vtkImageMapper3D.h> #include <vtkRenderer.h> #include <vtkRenderWindow.h> #include <vtkRenderWindowInteractor.h> #include <vtkSmartPointer.h> #include <vtkPNGReader.h> #include <vtkImageDilateErode3D.h> #include <vtkImageThreshold.h> int main(int argc, char *argv[]) { // Handle the arguments if( argc < 2 ) { std::cout << "Required arguments: filename.png" << std::endl; return EXIT_FAILURE; } // Read the image vtkSmartPointer<vtkPNGReader> reader = vtkSmartPointer<vtkPNGReader>::New(); reader->SetFileName(argv[1]); reader->Update(); vtkSmartPointer<vtkImageDilateErode3D> dilateErode = vtkSmartPointer<vtkImageDilateErode3D>::New(); dilateErode->SetInputConnection(reader->GetOutputPort()); dilateErode->SetDilateValue(0); dilateErode->SetErodeValue(255); dilateErode->SetKernelSize(5, 5, 3); dilateErode->ReleaseDataFlagOff(); vtkSmartPointer<vtkImageActor> originalActor = vtkSmartPointer<vtkImageActor>::New(); originalActor->GetMapper()->SetInputConnection(reader->GetOutputPort()); vtkSmartPointer<vtkImageActor> openCloseActor = vtkSmartPointer<vtkImageActor>::New(); openCloseActor->GetMapper()->SetInputConnection(dilateErode->GetOutputPort()); // Define viewport ranges // (xmin, ymin, xmax, ymax) double originalViewport[4] = {0.0, 0.0, 0.5, 1.0}; double openCloseViewport[4] = {0.5, 0.0, 1.0, 1.0}; // Setup renderers vtkSmartPointer<vtkRenderer> originalRenderer = vtkSmartPointer<vtkRenderer>::New(); originalRenderer->SetViewport(originalViewport); originalRenderer->AddActor(originalActor); originalRenderer->ResetCamera(); originalRenderer->SetBackground(.4, .5, .6); vtkSmartPointer<vtkRenderer> dilateErodeRenderer = vtkSmartPointer<vtkRenderer>::New(); dilateErodeRenderer->SetViewport(openCloseViewport); dilateErodeRenderer->AddActor(openCloseActor); dilateErodeRenderer->ResetCamera(); dilateErodeRenderer->SetBackground(.4, .5, .7); vtkSmartPointer<vtkRenderWindow> renderWindow = vtkSmartPointer<vtkRenderWindow>::New(); renderWindow->SetSize(600, 300); renderWindow->AddRenderer(originalRenderer); renderWindow->AddRenderer(dilateErodeRenderer); vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor = vtkSmartPointer<vtkRenderWindowInteractor>::New(); vtkSmartPointer<vtkInteractorStyleImage> style = vtkSmartPointer<vtkInteractorStyleImage>::New(); renderWindowInteractor->SetInteractorStyle(style); renderWindowInteractor->SetRenderWindow(renderWindow); renderWindowInteractor->Initialize(); renderWindowInteractor->Start(); return EXIT_SUCCESS; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 2.8) PROJECT(ImageDilateErode3D) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(ImageDilateErode3D MACOSX_BUNDLE ImageDilateErode3D.cxx) target_link_libraries(ImageDilateErode3D ${VTK_LIBRARIES})
Download and Build ImageDilateErode3D¶
Danger
The generation of tar files has not been ported to the new VTKExamples. Some tarballs may be missing or out-of-date.
Click here to download ImageDilateErode3D and its CMakeLists.txt file. Once the tarball ImageDilateErode3D.tar has been downloaded and extracted,
cd ImageDilateErode3D/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:
./ImageDilateErode3D
WINDOWS USERS PLEASE NOTE: Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.