ImageMirrorPad
VTKExamples/Cxx/Images/ImageMirrorPad
Description¶
This example shows how to enlarge an image and fill in the padded edges by mirroring the original pixels.
Code¶
ImageMirrorPad.cxx
#include <vtkSmartPointer.h> #include <vtkImageData.h> #include <vtkImageMapper3D.h> #include <vtkImageCanvasSource2D.h> #include <vtkImageMirrorPad.h> #include <vtkRenderWindow.h> #include <vtkRenderWindowInteractor.h> #include <vtkProperty.h> #include <vtkRenderer.h> #include <vtkImageActor.h> int main(int, char *[]) { // Create an image vtkSmartPointer<vtkImageCanvasSource2D> source = vtkSmartPointer<vtkImageCanvasSource2D>::New(); source->SetExtent(0, 20, 0, 20, 0, 0); source->SetScalarTypeToUnsignedChar(); source->SetDrawColor(0.0, 0.0, 0.0, 1.0); source->FillBox(-VTK_INT_MAX, VTK_INT_MAX, -VTK_INT_MAX, VTK_INT_MAX); source->SetDrawColor(255.0, 0.0, 0.0, 0.5); source->DrawCircle(10, 10, 5); source->Update(); vtkSmartPointer<vtkImageMirrorPad> mirrorPadFilter = vtkSmartPointer<vtkImageMirrorPad>::New(); mirrorPadFilter->SetInputConnection(source->GetOutputPort()); mirrorPadFilter->SetOutputWholeExtent(-10, 30, -10, 30, 0, 0); mirrorPadFilter->Update(); // Create an actor vtkSmartPointer<vtkImageActor> actor = vtkSmartPointer<vtkImageActor>::New(); actor->GetMapper()->SetInputConnection( mirrorPadFilter->GetOutputPort()); // Visualize vtkSmartPointer<vtkRenderer> renderer = vtkSmartPointer<vtkRenderer>::New(); renderer->AddActor(actor); renderer->ResetCamera(); vtkSmartPointer<vtkRenderWindow> renderWindow = vtkSmartPointer<vtkRenderWindow>::New(); renderWindow->AddRenderer ( renderer ); vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor = vtkSmartPointer<vtkRenderWindowInteractor>::New(); renderWindowInteractor->SetRenderWindow ( renderWindow ); renderWindowInteractor->Initialize(); renderWindowInteractor->Start(); return EXIT_SUCCESS; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 2.8) PROJECT(ImageMirrorPad) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(ImageMirrorPad MACOSX_BUNDLE ImageMirrorPad.cxx) target_link_libraries(ImageMirrorPad ${VTK_LIBRARIES})
Download and Build ImageMirrorPad¶
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 Some tarballs may be missing or out-of-date.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 ImageMirrorPad and its CMakeLists.txt file. Once the tarball ImageMirrorPad.tar has been downloaded and extracted,
cd ImageMirrorPad/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:
./ImageMirrorPad
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.