Difference between revisions of "ITK/Examples/Segmentation/OtsuThresholdImageFilter"

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(Deprecated content that is moved to sphinx)
 
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<div class="floatcenter">[[File:ITK_Examples_Baseline_Segmentation_TestOtsuThresholdImageFilter.png]]</div>
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{{warning|1=The media wiki content on this page is no longer maintained. The examples presented on the https://itk.org/Wiki/*  pages likely require ITK version 4.13 or earlier releasesIn many cases, the examples on this page no longer conform to the best practices for modern ITK versions.}}
 
 
==OtsuThresholdImageFilter.cxx==
 
<source lang="cpp">
 
#include "itkImage.h"
 
#include "itkOtsuThresholdImageFilter.h"
 
#include "itkImageFileReader.h"
 
#include "itkImageRegionIterator.h"
 
#include "itkNumericTraits.h"
 
 
 
#include "itksys/SystemTools.hxx"
 
#include <sstream>
 
 
 
#include "QuickView.h"
 
 
 
namespace
 
{
 
typedef unsigned char            PixelType;
 
typedef itk::Image<PixelType, 2>  ImageType;
 
}
 
 
 
static void CreateImage(ImageType::Pointer image);
 
 
 
int main(int argc, char *argv[])
 
{
 
  ImageType::Pointer image;
 
  if( argc < 2 )
 
    {
 
    image = ImageType::New();
 
    CreateImage(image.GetPointer());
 
    }
 
  else
 
    {
 
    typedef itk::ImageFileReader<ImageType> ReaderType;
 
    ReaderType::Pointer reader =
 
      ReaderType::New();
 
    reader->SetFileName(argv[1]);
 
    reader->Update();
 
 
 
    image = reader->GetOutput();
 
    }
 
 
 
  typedef itk::OtsuThresholdImageFilter <ImageType, ImageType>
 
          FilterType;
 
  FilterType::Pointer otsuFilter
 
          = FilterType::New();
 
  otsuFilter->SetInput(image);
 
  otsuFilter->Update(); // To compute threshold
 
 
 
  QuickView viewer;
 
  viewer.AddImage(
 
    image.GetPointer(),true,
 
    argc > 1 ? itksys::SystemTools::GetFilenameName(argv[1]) : "Generated image");
 
 
 
  std::stringstream desc;
 
  desc << "Otsu Threshold: "
 
      << itk::NumericTraits<FilterType::InputPixelType>::PrintType(otsuFilter->GetThreshold());
 
  viewer.AddImage(
 
    otsuFilter->GetOutput(),
 
    true,
 
    desc.str()); 
 
 
 
  viewer.Visualize();
 
 
 
  return EXIT_SUCCESS;
 
}
 
 
 
void CreateImage(ImageType::Pointer image)
 
{
 
  // Create an image
 
  ImageType::IndexType start;
 
  start.Fill(0);
 
 
 
  ImageType::SizeType size;
 
  size.Fill(100);
 
 
 
   ImageType::RegionType region;
 
  region.SetSize(size);
 
  region.SetIndex(start);
 
 
 
  image->SetRegions(region);
 
  image->Allocate();
 
 
 
  // Make the whole image white
 
  itk::ImageRegionIterator<ImageType> iterator(image,image->GetLargestPossibleRegion());
 
 
 
  /*
 
  //Create a square
 
  while(!iterator.IsAtEnd())
 
    {
 
    iterator.Set(255);
 
    ++iterator;
 
    }
 
  */
 
}
 
</source>
 
{{ITKVTKCMakeLists|{{SUBPAGENAME}}}}
 

Latest revision as of 19:25, 7 June 2019

Warning: The media wiki content on this page is no longer maintained. The examples presented on the https://itk.org/Wiki/* pages likely require ITK version 4.13 or earlier releases. In many cases, the examples on this page no longer conform to the best practices for modern ITK versions.