ITK/Examples/Images/ShrinkImageFilter: Difference between revisions

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==ShrinkImageFilter.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 "itkImage.h"
#include "itkImageFileWriter.h"
#include "itkRescaleIntensityImageFilter.h"
#include "itkShrinkImageFilter.h"
 
typedef itk::Image<unsigned char, 2> ImageType;
 
void CreateImage(ImageType::Pointer image);
 
int main(int, char *[])
{
  ImageType::Pointer image = ImageType::New();
  CreateImage(image);
 
  std::cout << "Original size: " << image->GetLargestPossibleRegion().GetSize() << std::endl;
 
  typedef itk::ShrinkImageFilter <ImageType, ImageType>
          ShrinkImageFilterType;
 
  ShrinkImageFilterType::Pointer shrinkFilter
          = ShrinkImageFilterType::New();
  shrinkFilter->SetInput(image);
  shrinkFilter->SetShrinkFactor(0, 2); // shrink the first dimension by a factor of 2 (i.e. 100 gets changed to 50)
   shrinkFilter->SetShrinkFactor(1, 3); // shrink the second dimension by a factor of 3 (i.e. 100 gets changed to 33)
  shrinkFilter->Update();
 
  std::cout << "New size: " << shrinkFilter->GetOutput()->GetLargestPossibleRegion().GetSize() << std::endl;
 
 
  return EXIT_SUCCESS;
}
 
void CreateImage(ImageType::Pointer image)
{
  // Create an image with 2 connected components
  ImageType::IndexType start;
  start.Fill(0);
 
  ImageType::SizeType size;
  size.Fill(100);
 
  ImageType::RegionType region(start, size);
  image->SetRegions(region);
  image->Allocate();
  image->FillBuffer(0);
 
  // Make a white square
  for(unsigned int r = 20; r < 80; r++)
    {
    for(unsigned int c = 20; c < 30; c++)
      {
      ImageType::IndexType pixelIndex;
      pixelIndex[0] = r;
      pixelIndex[1] = c;
 
      image->SetPixel(pixelIndex, 255);
      }
    }
}
 
</source>
 
==CMakeLists.txt==
<source lang="cmake">
 
cmake_minimum_required(VERSION 2.6)
 
PROJECT(ShrinkImageFilter)
 
FIND_PACKAGE(ITK REQUIRED)
INCLUDE(${ITK_USE_FILE})
 
ADD_EXECUTABLE(ShrinkImageFilter ShrinkImageFilter.cxx)
TARGET_LINK_LIBRARIES(ShrinkImageFilter
ITKBasicFilters ITKCommon ITKIO)
 
</source>

Latest revision as of 16:39, 5 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Warning: The media wiki content on this page is no longer maintained.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.