ITK/Examples/ImageProcessing/ConvolutionImageFilter: Difference between revisions

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(ITKv4 API change: SetKernelImageInput -> SetKernelImage)
(Deprecated content that is moved to sphinx)
 
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<div class="floatcenter">[[File:ITK_Examples_Baseline_ImageProcessing_TestConvolutionImageFilter.png]]</div>
{{warning|1=The media wiki content on this page is no longer maintained.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.
==ConvolutionImageFilter.cxx==
}}
<source lang="cpp">
#include "itkImage.h"
#include "itkImageFileReader.h"
#include "itkConvolutionImageFilter.h"
#include "itkImageRegionIterator.h"
 
#include "QuickView.h"
 
typedef itk::Image<float, 2> ImageType;
 
static void CreateKernel(ImageType::Pointer kernel, unsigned int width);
 
int main(int argc, char * argv[])
{
  // Verify command line arguments
  if( argc < 2 )
    {
    std::cerr << "Usage: ";
    std::cerr << argv[0] << "inputImageFile [width]" << std::endl;
    return EXIT_FAILURE;
    }
 
  // Parse command line arguments
  unsigned int width = 3;
  if (argc > 2)
    {
    width = atoi(argv[2]);
    }
 
  ImageType::Pointer kernel = ImageType::New();
  CreateKernel(kernel, width);
 
  typedef itk::ImageFileReader<ImageType>        ReaderType;
  typedef itk::ConvolutionImageFilter<ImageType> FilterType;
 
  // Create and setup a reader
  ReaderType::Pointer reader = ReaderType::New();
  reader->SetFileName( argv[1] );
 
  // Convolve image with kernel.
  FilterType::Pointer convolutionFilter = FilterType::New();
  convolutionFilter->SetInput(reader->GetOutput());
#if ITK_VERSION_MAJOR >= 4
  convolutionFilter->SetImageKernel(kernel);
#else
  convolutionFilter->SetImageKernelInput(kernel);
#endif
  QuickView viewer;
  viewer.AddImage<ImageType>(
    reader->GetOutput(),true,
    itksys::SystemTools::GetFilenameName(argv[1])); 
 
  std::stringstream desc;
  desc << "ConvolutionFilter\n"
      << "Kernel Witdh = " << width;
  viewer.AddImage<ImageType>(
    convolutionFilter->GetOutput(),
    true,
    desc.str());
  viewer.Visualize();
 
  return EXIT_SUCCESS;
}
 
void CreateKernel(ImageType::Pointer kernel, unsigned int width)
{
  ImageType::IndexType start;
  start.Fill(0);
 
  ImageType::SizeType size;
  size.Fill(width);
 
  ImageType::RegionType region;
  region.SetSize(size);
  region.SetIndex(start);
 
  kernel->SetRegions(region);
  kernel->Allocate();
 
   itk::ImageRegionIterator<ImageType> imageIterator(kernel, region);
 
  while(!imageIterator.IsAtEnd())
    {
    //imageIterator.Set(255);
    imageIterator.Set(1);
 
    ++imageIterator;
    }
}
</source>
 
{{ITKVTKCMakeLists|ConvolutionImageFilter|}}

Latest revision as of 19:13, 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.