ImageLaplacian
VTKExamples/Cxx/Images/ImageLaplacian
Code¶
ImageLaplacian.cxx
#include <vtkSmartPointer.h> #include <vtkImageData.h> #include <vtkImageMapper3D.h> #include <vtkImageMandelbrotSource.h> #include <vtkImageLaplacian.h> #include <vtkImageActor.h> #include <vtkRenderer.h> #include <vtkRenderWindow.h> #include <vtkRenderWindowInteractor.h> #include <vtkInteractorStyleImage.h> #include <vtkImageCast.h> int main(int, char *[]) { // Create an image vtkSmartPointer<vtkImageMandelbrotSource> source = vtkSmartPointer<vtkImageMandelbrotSource>::New(); source->Update(); vtkSmartPointer<vtkImageCast> castOriginal = vtkSmartPointer<vtkImageCast>::New(); castOriginal->SetInputConnection(source->GetOutputPort()); castOriginal->SetOutputScalarTypeToFloat(); castOriginal->Update(); vtkSmartPointer<vtkImageLaplacian> laplacianFilter = vtkSmartPointer<vtkImageLaplacian>::New(); laplacianFilter->SetInputConnection(source->GetOutputPort()); laplacianFilter->Update(); vtkSmartPointer<vtkImageCast> castLaplacian = vtkSmartPointer<vtkImageCast>::New(); castLaplacian->SetInputConnection(laplacianFilter->GetOutputPort()); castLaplacian->SetOutputScalarTypeToFloat(); castLaplacian->Update(); // Define viewport ranges // (xmin, ymin, xmax, ymax) double leftViewport[4] = {0.0, 0.0, 0.5, 1.0}; double rightViewport[4] = {0.5, 0.0, 1.0, 1.0}; vtkSmartPointer<vtkImageActor> originalActor = vtkSmartPointer<vtkImageActor>::New(); originalActor->GetMapper()->SetInputConnection( castOriginal->GetOutputPort()); vtkSmartPointer<vtkImageActor> laplacianActor = vtkSmartPointer<vtkImageActor>::New(); laplacianActor->GetMapper()->SetInputConnection( castLaplacian->GetOutputPort()); vtkSmartPointer<vtkRenderWindow> renderWindow = vtkSmartPointer<vtkRenderWindow>::New(); renderWindow->SetSize(600,300); vtkSmartPointer<vtkRenderWindowInteractor> interactor = vtkSmartPointer<vtkRenderWindowInteractor>::New(); vtkSmartPointer<vtkInteractorStyleImage> style = vtkSmartPointer<vtkInteractorStyleImage>::New(); interactor->SetInteractorStyle( style ); interactor->SetRenderWindow(renderWindow); // Setup both renderers vtkSmartPointer<vtkRenderer> originalRenderer = vtkSmartPointer<vtkRenderer>::New(); originalRenderer->SetViewport(leftViewport); vtkSmartPointer<vtkRenderer> laplacianRenderer = vtkSmartPointer<vtkRenderer>::New(); laplacianRenderer->SetViewport(rightViewport); renderWindow->AddRenderer(originalRenderer); renderWindow->AddRenderer(laplacianRenderer); originalRenderer->AddActor(originalActor); laplacianRenderer->AddActor(laplacianActor); originalRenderer->ResetCamera(); laplacianRenderer->ResetCamera(); renderWindow->Render(); interactor->Start(); return EXIT_SUCCESS; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 2.8) PROJECT(ImageLaplacian) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(ImageLaplacian MACOSX_BUNDLE ImageLaplacian.cxx) target_link_libraries(ImageLaplacian ${VTK_LIBRARIES})
Download and Build ImageLaplacian¶
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 ImageLaplacian and its CMakeLists.txt file. Once the tarball ImageLaplacian.tar has been downloaded and extracted,
cd ImageLaplacian/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:
./ImageLaplacian
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.