ITK/Examples/Smoothing/SmoothingRecursiveGaussianImageFilter

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ITK Examples Baseline Smoothing TestSmoothingRecursiveGaussianImageFilter.png

This examples smooths an RGB image.

Contents

SmoothingRecursiveGaussianImageFilter.cxx

#include "itkImage.h"
#include "itkImageFileReader.h"
#include "itkDiscreteGaussianImageFilter.h"
#include "itkSmoothingRecursiveGaussianImageFilter.h"
#include "itkRGBPixel.h"
#include "itkNthElementImageAdaptor.h"
#include "itkComposeRGBImageFilter.h"
 
#include "QuickView.h"
 
int main(int argc, char * argv[])
{
  // Verify command line arguments
  if( argc < 2 )
    {
    std::cerr << "Usage: " << std::endl;
    std::cerr << argv[0] << " inputImageFile [sigma]" << std::endl;
    return EXIT_FAILURE;
    }
 
  double sigma = 4.0;
  if (argc > 2)
    {
    sigma = atof(argv[2]);
    }
 
 
  const unsigned int Dimension = 2;
  typedef unsigned char PixelComponentType;
 
  typedef itk::Image<itk::RGBPixel< PixelComponentType>,
    Dimension > ColorImageType;
 
  typedef itk::ImageFileReader< ColorImageType >
    ReaderType;
  // Create and setup a reader
  ReaderType::Pointer reader = ReaderType::New();
  reader->SetFileName( argv[1] );
  reader->Update();
 
  typedef itk::SmoothingRecursiveGaussianImageFilter<
    ColorImageType, ColorImageType >  FilterType;
 
  FilterType::Pointer smoothingRecursiveGaussianImageFilter = FilterType::New();
  smoothingRecursiveGaussianImageFilter->SetInput(reader->GetOutput());
  smoothingRecursiveGaussianImageFilter->SetSigma(sigma);
  smoothingRecursiveGaussianImageFilter->Update();
 
  QuickView viewer;
  viewer.AddRGBImage(
    reader->GetOutput(),true,
    itksys::SystemTools::GetFilenameName(argv[1]));
 
  std::stringstream desc;
  desc << "SmoothingRecursiveGaussian\n sigma = " << sigma;
  viewer.AddRGBImage(
    smoothingRecursiveGaussianImageFilter->GetOutput(),
    true,
    desc.str());
 
  viewer.Visualize();
 
  return EXIT_SUCCESS;
}

CMakeLists.txt

cmake_minimum_required(VERSION 2.8)
 
project(SmoothingRecursiveGaussianImageFilter)
 
find_package(ItkVtkGlue REQUIRED)
include(${ItkVtkGlue_USE_FILE})
 
add_executable(SmoothingRecursiveGaussianImageFilter SmoothingRecursiveGaussianImageFilter.cxx)
target_link_libraries(SmoothingRecursiveGaussianImageFilter
  ItkVtkGlue  ${VTK_LIBRARIES} ${ITK_LIBRARIES})

Building All of the Examples

Many of the examples in the ITK Wiki Examples Collection require VTK. You can build all of the the examples by following these instructions. If you are a new VTK user, you may want to try the Superbuild which will build a proper ITK and VTK.

ItkVtkGlue

If you download the entire ITK Wiki Examples Collection, the ItkVtkGlue directory will be included and configured. If you wish to just build a few examples, then you will need to download ItkVtkGlue and build it. When you run cmake it will ask you to specify the location of the ItkVtkGlue binary directory.

Retrieved from "http://www.vtkedge.org/Wiki/ITK/Examples/Smoothing/SmoothingRecursiveGaussianImageFilter"
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