ITK/Examples/ImageProcessing/LabelOverlayImageFilter: Difference between revisions

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==LabelOverlayImageFilter.cxx==
{{warning|1=The media wiki content on this page is no longer maintainedThe 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.
<source lang="cpp">
}}
#include "itkBinaryImageToLabelMapFilter.h"
#include "itkImage.h"
#include "itkImageFileWriter.h"
#include "itkImageRegionIterator.h"
#include "itkLabelMapToLabelImageFilter.h"
#include "itkLabelOverlayImageFilter.h"
#include "itkRGBPixel.h"
 
typedef itk::Image<unsigned char, 2>  ImageType;
static void CreateImage(ImageType::Pointer image);
 
int main(int, char *[])
{
  ImageType::Pointer image = ImageType::New();
  CreateImage(image);
 
  typedef itk::BinaryImageToLabelMapFilter<ImageType> BinaryImageToLabelMapFilterType;
  BinaryImageToLabelMapFilterType::Pointer binaryImageToLabelMapFilter = BinaryImageToLabelMapFilterType::New();
  binaryImageToLabelMapFilter->SetInput(image);
  binaryImageToLabelMapFilter->Update();
 
  typedef itk::LabelMapToLabelImageFilter<BinaryImageToLabelMapFilterType::OutputImageType, ImageType> LabelMapToLabelImageFilterType;
  LabelMapToLabelImageFilterType::Pointer labelMapToLabelImageFilter = LabelMapToLabelImageFilterType::New();
  labelMapToLabelImageFilter->SetInput(binaryImageToLabelMapFilter->GetOutput());
  labelMapToLabelImageFilter->Update();
 
  typedef itk::RGBPixel<unsigned char> RGBPixelType;
  typedef itk::Image<RGBPixelType> RGBImageType;
 
  typedef itk::LabelOverlayImageFilter<ImageType, ImageType, RGBImageType>
                                      LabelOverlayImageFilterType;
  LabelOverlayImageFilterType::Pointer labelOverlayImageFilter = LabelOverlayImageFilterType::New();
  labelOverlayImageFilter->SetInput(image);
  labelOverlayImageFilter->SetLabelImage(labelMapToLabelImageFilter->GetOutput());
  labelOverlayImageFilter->SetOpacity(.5);
  labelOverlayImageFilter->Update();
 
  typedef  itk::ImageFileWriter< RGBImageType > WriterType;
  WriterType::Pointer writer = WriterType::New();
  writer->SetFileName("output.png");
  writer->SetInput(labelOverlayImageFilter->GetOutput());
  writer->Update();
 
  return EXIT_SUCCESS;
}
 
void CreateImage(ImageType::Pointer image)
{
  // Create a black image with a white square
  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();
  image->FillBuffer(0);
 
  itk::ImageRegionIterator<ImageType> imageIterator(image,image->GetLargestPossibleRegion());
 
  // Make two squares
  while(!imageIterator.IsAtEnd())
    {
    if((imageIterator.GetIndex()[0] > 5 && imageIterator.GetIndex()[0] < 20) &&
      (imageIterator.GetIndex()[1] > 5 && imageIterator.GetIndex()[1] < 20) )
        {
        imageIterator.Set(255);
        }
       
    if((imageIterator.GetIndex()[0] > 50 && imageIterator.GetIndex()[0] < 70) &&
      (imageIterator.GetIndex()[1] > 50 && imageIterator.GetIndex()[1] < 70) )
        {
        imageIterator.Set(255);
        }
    ++imageIterator;
    }
   
   typedef  itk::ImageFileWriter< ImageType  > WriterType;
  WriterType::Pointer writer = WriterType::New();
  writer->SetFileName("image.png");
  writer->SetInput(image);
  writer->Update();
}
 
</source>
 
{{ITKCMakeLists|{{SUBPAGENAME}}}}

Latest revision as of 21:16, 4 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.