Pixel Division Of Two Images

Synopsis

Pixel-wise division of two images.

Results

PixelDivisionOfTwoImages.png

PixelDivisionOfTwoImages.png

Code

C++

#include "itkDivideImageFilter.h"
#include "itkImage.h"
#include "itkImageFileWriter.h"

using ImageType = itk::Image<unsigned char, 2>;

void
CreateImage1(ImageType::Pointer image);
void
CreateImage2(ImageType::Pointer image);

int
main(int, char *[])
{
  ImageType::Pointer image1 = ImageType::New();
  CreateImage1(image1);

  ImageType::Pointer image2 = ImageType::New();
  CreateImage2(image2);

  using DivideImageFilterType = itk::DivideImageFilter<ImageType, ImageType, ImageType>;

  DivideImageFilterType::Pointer divideImageFilter = DivideImageFilterType::New();
  divideImageFilter->SetInput1(image1);
  divideImageFilter->SetInput2(image2);
  divideImageFilter->Update();

  using WriterType = itk::ImageFileWriter<ImageType>;
  WriterType::Pointer writer = WriterType::New();
  writer->SetFileName("test.png");
  writer->SetInput(divideImageFilter->GetOutput());
  writer->Update();

  return EXIT_SUCCESS;
}

void
CreateImage1(ImageType::Pointer image)
{
  // Create an image with 2 connected components
  ImageType::RegionType region;
  ImageType::IndexType  start;
  start[0] = 0;
  start[1] = 0;

  ImageType::SizeType size;
  unsigned int        NumRows = 200;
  unsigned int        NumCols = 300;
  size[0] = NumRows;
  size[1] = NumCols;

  region.SetSize(size);
  region.SetIndex(start);

  image->SetRegions(region);
  image->Allocate();

  // Make a square
  for (unsigned int r = 20; r < 80; r++)
  {
    for (unsigned int c = 20; c < 80; c++)
    {
      ImageType::IndexType pixelIndex;
      pixelIndex[0] = r;
      pixelIndex[1] = c;

      image->SetPixel(pixelIndex, 15);
    }
  }
}


void
CreateImage2(ImageType::Pointer image)
{
  // Create an image with 2 connected components
  ImageType::RegionType region;
  ImageType::IndexType  start;
  start[0] = 0;
  start[1] = 0;

  ImageType::SizeType size;
  unsigned int        NumRows = 200;
  unsigned int        NumCols = 300;
  size[0] = NumRows;
  size[1] = NumCols;

  region.SetSize(size);
  region.SetIndex(start);

  image->SetRegions(region);
  image->Allocate();

  // Make another square
  for (unsigned int r = 40; r < 100; r++)
  {
    for (unsigned int c = 40; c < 100; c++)
    {
      ImageType::IndexType pixelIndex;
      pixelIndex[0] = r;
      pixelIndex[1] = c;

      image->SetPixel(pixelIndex, 15);
    }
  }
}

Classes demonstrated