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
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.