ImageOpenClose3D
VTKExamples/Cxx/Images/ImageOpenClose3D
Description¶
This example reads a binary image and performs opening on one value and closing on another (morphological operations).
Code¶
ImageOpenClose3D.cxx
#include <vtkImageActor.h> #include <vtkImageMapper3D.h> #include <vtkImageCast.h> #include <vtkInteractorStyleImage.h> #include <vtkImageAccumulate.h> #include <vtkImageData.h> #include <vtkRenderer.h> #include <vtkRenderWindow.h> #include <vtkRenderWindowInteractor.h> #include <vtkSmartPointer.h> #include <vtkPNGReader.h> #include <vtkImageOpenClose3D.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<vtkImageOpenClose3D> openClose = vtkSmartPointer<vtkImageOpenClose3D>::New(); openClose->SetInputConnection(reader->GetOutputPort()); openClose->SetOpenValue(0); openClose->SetCloseValue(255); openClose->SetKernelSize(5, 5, 3); openClose->ReleaseDataFlagOff(); openClose->GetOutput(); openClose->GetCloseValue(); openClose->GetOpenValue(); vtkSmartPointer<vtkImageActor> originalActor = vtkSmartPointer<vtkImageActor>::New(); originalActor->GetMapper()->SetInputConnection( reader->GetOutputPort()); vtkSmartPointer<vtkImageActor> openCloseActor = vtkSmartPointer<vtkImageActor>::New(); openCloseActor->GetMapper()->SetInputConnection( openClose->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> openCloseRenderer = vtkSmartPointer<vtkRenderer>::New(); openCloseRenderer->SetViewport(openCloseViewport); openCloseRenderer->AddActor(openCloseActor); openCloseRenderer->ResetCamera(); openCloseRenderer->SetBackground(.4, .5, .7); vtkSmartPointer<vtkRenderWindow> renderWindow = vtkSmartPointer<vtkRenderWindow>::New(); renderWindow->SetSize(600, 300); renderWindow->AddRenderer(originalRenderer); renderWindow->AddRenderer(openCloseRenderer); 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(ImageOpenClose3D) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(ImageOpenClose3D MACOSX_BUNDLE ImageOpenClose3D.cxx) target_link_libraries(ImageOpenClose3D ${VTK_LIBRARIES})
Download and Build ImageOpenClose3D¶
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 ImageOpenClose3D and its CMakeLists.txt file. Once the tarball ImageOpenClose3D.tar has been downloaded and extracted,
cd ImageOpenClose3D/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:
./ImageOpenClose3D
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.