ImageStack
VTKExamples/Cxx/Images/ImageStack
Code¶
ImageStack.cxx
#include <vtkVersion.h> #include <vtkImageData.h> #include <vtkImageMapper.h> #include <vtkImageProperty.h> #include <vtkImageSliceMapper.h> #include <vtkImageSlice.h> #include <vtkImageStack.h> #include <vtkInteractorStyleImage.h> #include <vtkRenderer.h> #include <vtkRenderWindow.h> #include <vtkRenderWindowInteractor.h> #include <vtkSmartPointer.h> static void CreateColorImage(vtkImageData*, const int corner, const unsigned int channel); int main(int, char *[]) { // Image 1 vtkSmartPointer<vtkImageData> image1 = vtkSmartPointer<vtkImageData>::New(); CreateColorImage(image1, 1, 0); vtkSmartPointer<vtkImageSliceMapper> imageSliceMapper1 = vtkSmartPointer<vtkImageSliceMapper>::New(); #if VTK_MAJOR_VERSION <= 5 imageSliceMapper1->SetInputConnection(image1->GetProducerPort()); #else imageSliceMapper1->SetInputData(image1); #endif vtkSmartPointer<vtkImageSlice> imageSlice1 = vtkSmartPointer<vtkImageSlice>::New(); imageSlice1->SetMapper(imageSliceMapper1); imageSlice1->GetProperty()->SetOpacity(.5); // Image 2 vtkSmartPointer<vtkImageData> image2 = vtkSmartPointer<vtkImageData>::New(); CreateColorImage(image2, 4, 1); vtkSmartPointer<vtkImageSliceMapper> imageSliceMapper2 = vtkSmartPointer<vtkImageSliceMapper>::New(); #if VTK_MAJOR_VERSION <= 5 imageSliceMapper2->SetInputConnection(image2->GetProducerPort()); #else imageSliceMapper2->SetInputData(image2); #endif vtkSmartPointer<vtkImageSlice> imageSlice2 = vtkSmartPointer<vtkImageSlice>::New(); imageSlice2->SetMapper(imageSliceMapper2); imageSlice2->GetProperty()->SetOpacity(.5); // Stack vtkSmartPointer<vtkImageStack> imageStack = vtkSmartPointer<vtkImageStack>::New(); imageStack->AddImage(imageSlice1); imageStack->AddImage(imageSlice2); //imageStack->SetActiveLayer(1); // Setup renderers vtkSmartPointer<vtkRenderer> renderer = vtkSmartPointer<vtkRenderer>::New(); renderer->AddViewProp(imageStack); 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; } void CreateColorImage(vtkImageData* image, const int corner, const unsigned int channel) { image->SetDimensions(10, 10, 1); #if VTK_MAJOR_VERSION <= 5 image->SetNumberOfScalarComponents(3); image->SetScalarTypeToUnsignedChar(); image->AllocateScalars(); #else image->AllocateScalars(VTK_UNSIGNED_CHAR,3); #endif for(unsigned int x = 0; x < 10; x++) { for(unsigned int y = 0; y < 10; y++) { unsigned char* pixel = static_cast<unsigned char*>(image->GetScalarPointer(x,y,0)); pixel[0] = 0; pixel[1] = 0; pixel[2] = 0; } } for(int x = corner; x < corner+3; x++) { for(int y = corner; y < corner+3; y++) { unsigned char* pixel = static_cast<unsigned char*>(image->GetScalarPointer(x,y,0)); pixel[channel] = 255; } } }
CMakeLists.txt¶
cmake_minimum_required(VERSION 2.8) PROJECT(ImageStack) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(ImageStack MACOSX_BUNDLE ImageStack.cxx) target_link_libraries(ImageStack ${VTK_LIBRARIES})
Download and Build ImageStack¶
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 ImageStack and its CMakeLists.txt file. Once the tarball ImageStack.tar has been downloaded and extracted,
cd ImageStack/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:
./ImageStack
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.