ITK  5.0.0
Insight Segmentation and Registration Toolkit
WikiExamples/ImageProcessing/RegionOfInterestImageFilter.cxx
#include "itkImage.h"
#include "itkRGBPixel.h"
#include "QuickView.h"
#include <iostream>
#include <string>
int main(int argc, char *argv[])
{
if(argc < 2)
{
std::cerr << "Usage: ";
std::cerr << argv[0] << " inputImageFile [start] [size]" << std::endl;
return EXIT_FAILURE;
}
std::string filename = argv[1];
using ReaderType = itk::ImageFileReader<ImageType>;
ReaderType::Pointer reader = ReaderType::New();
reader->SetFileName(filename.c_str());
reader->Update();
ImageType::SizeType inSize = reader->GetOutput()->GetLargestPossibleRegion().GetSize();
FilterType::Pointer filter = FilterType::New();
start[0] = inSize[0]/4;
start[1] = inSize[1]/4;
size[0] = inSize[0]/4;
size[1] = inSize[1]/4;
if (argc > 2)
{
start.Fill(atoi(argv[2]));
}
if (argc > 3)
{
size.Fill(atoi(argv[3]));
}
ImageType::RegionType desiredRegion;
desiredRegion.SetSize(size);
desiredRegion.SetIndex(start);
filter->SetRegionOfInterest(desiredRegion);
filter->SetInput(reader->GetOutput());
QuickView viewer;
viewer.AddRGBImage(
reader->GetOutput(),true,
itksys::SystemTools::GetFilenameName(argv[1]));
std::stringstream desc;
desc << "RegionOfInterestImageFilter\nstart = " << start
<< " size = " << size;
viewer.AddRGBImage(
filter->GetOutput(),
true,
desc.str());
viewer.Visualize();
return EXIT_SUCCESS;
}