ITK/Examples/ImageProcessing/RegionOfInterestImageFilter

RegionOfInterestImageFilter.cxx

<source lang="cpp">

1. include "itkImage.h"
2. include "itkImageFileReader.h"
3. include "itkRegionOfInterestImageFilter.h"
4. include "itkRGBPixel.h"

1. include "QuickView.h"

1. include <iostream>
2. 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];

 typedef itk::Image<itk::RGBPixel<unsigned char>, 2> ImageType;
 typedef itk::ImageFileReader<ImageType>             ReaderType;

 ReaderType::Pointer reader = ReaderType::New();
 reader->SetFileName(filename.c_str());
 reader->Update();

 ImageType::SizeType inSize = reader->GetOutput()->GetLargestPossibleRegion().GetSize();

 typedef itk::RegionOfInterestImageFilter< ImageType, ImageType > FilterType;
 FilterType::Pointer filter = FilterType::New();

 ImageType::IndexType start;
 start[0] = inSize[0]/4;
 start[1] = inSize[1]/4;

 ImageType::SizeType size;
 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;

} </source>

CMakeLists.txt

<source lang="cmake"> cmake_minimum_required(VERSION 2.6)

PROJECT(RegionOfInterestImageFilter)

include_directories(/home/doriad/src/ITK/Wrapping/WrapITK/ExternalProjects/ItkVtkGlue/src/)

FIND_PACKAGE(VTK REQUIRED) INCLUDE(${VTK_USE_FILE})

FIND_PACKAGE(ITK REQUIRED) INCLUDE(${ITK_USE_FILE})

ADD_EXECUTABLE(RegionOfInterestImageFilter RegionOfInterestImageFilter.cpp) TARGET_LINK_LIBRARIES(RegionOfInterestImageFilter vtkHybrid ITKBasicFilters ITKCommon ITKIO)

</source>