ITK  4.8.0
Insight Segmentation and Registration Toolkit
WikiExamples/ImageProcessing/NthElementImageAdaptor.cxx
typedef itk::Image<itk::CovariantVector< float, 3>, 2> VectorImageType;
static void CreateImage(VectorImageType::Pointer image);
int main(int, char *[])
{
VectorImageType::Pointer image = VectorImageType::New();
CreateImage(image);
index.Fill(0);
std::cout << image->GetPixel(index) << std::endl;
typedef itk::NthElementImageAdaptor<VectorImageType,
float> ImageAdaptorType;
ImageAdaptorType::Pointer adaptor = ImageAdaptorType::New();
adaptor->SelectNthElement(0);
adaptor->SetImage(image);
std::cout << adaptor->GetPixel(index) << std::endl;
return EXIT_SUCCESS;
}
void CreateImage(VectorImageType::Pointer image)
{
VectorImageType::IndexType start;
start.Fill(0);
VectorImageType::SizeType size;
size.Fill(2);
VectorImageType::RegionType region;
region.SetSize(size);
region.SetIndex(start);
image->SetRegions(region);
image->Allocate();
// Create a pixel and fill it with (1,2,3), and set every pixel of the image to this pixel.
itk::ImageRegionIterator<VectorImageType> imageIterator(image,image->GetLargestPossibleRegion());
vectorPixel[0] = 1;
vectorPixel[1] = 2;
vectorPixel[2] = 3;
image->FillBuffer(vectorPixel);
}