ITK/Examples/ImageProcessing/NormalizeImageFilter

Normalize an image by setting its mean to 0 and variance to 1.

NormalizeImageFilter.cxx

<source lang="cpp">

1. include "itkImage.h"
2. include "itkImageFileReader.h"
3. include "itkNormalizeImageFilter.h"
4. include "itkStatisticsImageFilter.h"

1. include "QuickView.h"

1. include <iomanip>

int main(int argc, char *argv[]) {

 if(argc < 2)
   {
   std::cerr << "Usage: " << argv[0] << " filename" << std::endl;
   return EXIT_FAILURE;
   }

 typedef itk::Image<double, 2>  FloatImageType;

 typedef itk::ImageFileReader<FloatImageType>
   ReaderType;
 ReaderType::Pointer reader = ReaderType::New();
 reader->SetFileName(argv[1]);

 typedef itk::NormalizeImageFilter< FloatImageType, FloatImageType >
   NormalizeFilterType;
 NormalizeFilterType::Pointer normalizeFilter = NormalizeFilterType::New();
 normalizeFilter->SetInput(reader->GetOutput());

 typedef itk::StatisticsImageFilter< FloatImageType >
   StatisticsFilterType;
 StatisticsFilterType::Pointer statistics1 = StatisticsFilterType::New();
 statistics1->SetInput(reader->GetOutput());

 StatisticsFilterType::Pointer statistics2 = StatisticsFilterType::New();
 statistics2->SetInput(normalizeFilter->GetOutput());

 QuickView viewer;

 std::stringstream desc1;
 statistics1->Update();
 desc1 << itksys::SystemTools::GetFilenameName(argv[1])
       << "\nMean: " << statistics1->GetMean()
       << " Variance: " << statistics1->GetVariance();
 viewer.AddImage(
   reader->GetOutput(),
   true,
   desc1.str());  

 std::stringstream desc2;
 statistics2->Update();
 desc2 << "Normalize"
       << "\nMean: "
       << std::fixed << std::setprecision (2) << statistics2->GetMean()
       << " Variance: " << statistics2->GetVariance();
 viewer.AddImage(
   normalizeFilter->GetOutput(),
   true,
   desc2.str());  

 viewer.Visualize();

 return EXIT_SUCCESS;

} </source>

CMakeLists.txt

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

PROJECT(NormalizeImageFilter)

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(NormalizeImageFilter NormalizeImageFilter.cxx) TARGET_LINK_LIBRARIES(NormalizeImageFilter vtkHybrid ITKIO ITKBasicFilters ITKCommon )

</source>