ITK  4.9.0
Insight Segmentation and Registration Toolkit
WikiExamples/Iterators/ConstantBoundaryCondition.cxx
#include "itkImage.h"
#include "vtkVersion.h"
#include "vtkImageViewer.h"
#include "vtkImageMapper3D.h"
#include "vtkRenderWindowInteractor.h"
#include "vtkSmartPointer.h"
#include "vtkImageActor.h"
#include "vtkInteractorStyleImage.h"
#include "vtkRenderer.h"
typedef itk::Image<unsigned char, 2> ImageType;
static void CreateImage(ImageType::Pointer image);
int main(int, char*[])
{
ImageType::Pointer image = ImageType::New();
CreateImage(image);
ImageType::SizeType regionSize;
regionSize[0] = 50;
regionSize[1] = 1;
ImageType::IndexType regionIndex;
regionIndex[0] = 0;
regionIndex[1] = 0;
ImageType::RegionType region;
region.SetSize(regionSize);
region.SetIndex(regionIndex);
ImageType::SizeType radius;
radius[0] = 1;
radius[1] = 1;
typedef itk::ConstantBoundaryCondition<ImageType> BoundaryConditionType;
while(!iterator.IsAtEnd())
{
for(unsigned int i = 0; i < 9; i++)
{
ImageType::IndexType index = iterator.GetIndex(i);
std::cout << "Index: " << index
<< " Pixel: " << i << " = "
<< (int)iterator.GetPixel(i) << std::endl;
}
++iterator;
}
// Visualize
ConnectorType::Pointer connector = ConnectorType::New();
connector->SetInput(image);
vtkSmartPointer<vtkImageActor> actor =
vtkSmartPointer<vtkImageActor>::New();
#if VTK_MAJOR_VERSION <= 5
actor->SetInput(connector->GetOutput());
#else
connector->Update();
actor->GetMapper()->SetInputData(connector->GetOutput());
#endif
vtkSmartPointer<vtkRenderWindow> renderWindow =
vtkSmartPointer<vtkRenderWindow>::New();
vtkSmartPointer<vtkRenderWindowInteractor> interactor =
vtkSmartPointer<vtkRenderWindowInteractor>::New();
interactor->SetRenderWindow(renderWindow);
vtkSmartPointer<vtkRenderer> renderer =
vtkSmartPointer<vtkRenderer>::New();
renderWindow->AddRenderer(renderer);
renderer->AddActor(actor);
renderer->ResetCamera();
renderWindow->Render();
vtkSmartPointer<vtkInteractorStyleImage> style =
vtkSmartPointer<vtkInteractorStyleImage>::New();
interactor->SetInteractorStyle(style);
interactor->Start();
return EXIT_SUCCESS;
}
void CreateImage(ImageType::Pointer image)
{
// Create an image with 2 connected components
ImageType::RegionType region;
ImageType::IndexType start;
start[0] = 0;
start[1] = 0;
ImageType::SizeType size;
unsigned int NumRows = 5;
unsigned int NumCols = 5;
size[0] = NumRows;
size[1] = NumCols;
region.SetSize(size);
region.SetIndex(start);
image->SetRegions(region);
image->Allocate();
itk::ImageRegionIterator<ImageType> imageIterator(image,region);
// Set all pixels to white
while(!imageIterator.IsAtEnd())
{
imageIterator.Set(255);
++imageIterator;
}
}