ImageImport
VTKExamples/Cxx/Images/ImageImport
Code¶
ImageImport.cxx
#include <vtkVersion.h> #include <vtkImageData.h> #include <vtkSmartPointer.h> #include <vtkImageImport.h> #include <vtkRenderWindow.h> #include <vtkRenderWindowInteractor.h> #include <vtkRenderer.h> #include <vtkImageActor.h> #include <vtkInteractorStyleImage.h> #include <vtkXMLImageDataWriter.h> int main(int, char *[]) { // Create a c-style image const int width = 4; const int height = 4; unsigned char cImage[width*height]; unsigned char value = 0; for(unsigned int row = 0; row < height; ++row) { for(unsigned int col = 0; col < width; ++col) { cImage[row * width + col] = value; value += 10; } } // Convert the c-style image to a vtkImageData vtkSmartPointer<vtkImageImport> imageImport = vtkSmartPointer<vtkImageImport>::New(); imageImport->SetDataSpacing(1, 1, 1); imageImport->SetDataOrigin(0, 0, 0); imageImport->SetWholeExtent(0, width-1, 0, height-1, 0, 0); imageImport->SetDataExtentToWholeExtent(); imageImport->SetDataScalarTypeToUnsignedChar(); imageImport->SetNumberOfScalarComponents(1); imageImport->SetImportVoidPointer(cImage); imageImport->Update(); // Create an actor vtkSmartPointer<vtkImageActor> actor = vtkSmartPointer<vtkImageActor>::New(); #if VTK_MAJOR_VERSION <= 5 actor->SetInput(imageImport->GetOutput()); #else actor->SetInputData(imageImport->GetOutput()); #endif // Setup renderer vtkSmartPointer<vtkRenderer> renderer = vtkSmartPointer<vtkRenderer>::New(); renderer->AddActor(actor); renderer->ResetCamera(); // Setup render window vtkSmartPointer<vtkRenderWindow> renderWindow = vtkSmartPointer<vtkRenderWindow>::New(); renderWindow->AddRenderer(renderer); // Setup render window interactor vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor = vtkSmartPointer<vtkRenderWindowInteractor>::New(); vtkSmartPointer<vtkInteractorStyleImage> style = vtkSmartPointer<vtkInteractorStyleImage>::New(); renderWindowInteractor->SetInteractorStyle(style); // Render and start interaction renderWindowInteractor->SetRenderWindow(renderWindow); renderWindowInteractor->Initialize(); renderWindowInteractor->Start(); return EXIT_SUCCESS; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 2.8) PROJECT(ImageImport) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(ImageImport MACOSX_BUNDLE ImageImport.cxx) target_link_libraries(ImageImport ${VTK_LIBRARIES})
Download and Build ImageImport¶
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 ImageImport and its CMakeLists.txt file. Once the tarball ImageImport.tar has been downloaded and extracted,
cd ImageImport/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:
./ImageImport
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.