ITK/Examples/Smoothing/DiscreteGaussianImageFilter

Blur an image using a Gaussian kernel.

DiscreteGaussianImageFilter.cxx

<source lang="cpp">

1. include "itkImage.h"
2. include "itkImageFileReader.h"
3. include "itkDiscreteGaussianImageFilter.h"

1. 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 [variance]" << std::endl;
   return EXIT_FAILURE;
   }

 // Parse command line argumentsa
 std::string inputFilename = argv[1];

 double variance = 4.0;
 if (argc > 2)
   {
   variance = atof(argv[2]);
   }

 // Setup types
 typedef itk::Image< unsigned char, 2 > UnsignedCharImageType;
 typedef itk::Image< float, 2 >         FloatImageType;

 typedef itk::ImageFileReader< UnsignedCharImageType >  readerType;

 typedef itk::DiscreteGaussianImageFilter<
   UnsignedCharImageType, FloatImageType >  filterType;

 // Create and setup a reader
 readerType::Pointer reader = readerType::New();
 reader->SetFileName( inputFilename.c_str() );

 // Create and setup a Gaussian filter
 filterType::Pointer gaussianFilter = filterType::New();
 gaussianFilter->SetInput( reader->GetOutput() );
 gaussianFilter->SetVariance(variance);

 QuickView viewer;
 viewer.AddImage<UnsignedCharImageType>(reader->GetOutput());
 viewer.AddImage<FloatImageType>(gaussianFilter->GetOutput());
 viewer.Visualize();

 return EXIT_SUCCESS;

} </source>

CMakeLists.txt

<source lang="cmake"> cmake_minimum_required(VERSION 2.6)

PROJECT(DiscreteGaussianImageFilter)

include_directories(/home/doriad/src/ITK/Wrapping/WrapITK/ExternalProjects/ItkVtkGlue/src/)

FIND_PACKAGE(VTK REQUIRED) INCLUDE(${VTK_USE_FILE})

FIND_PACKAGE(ITK REQUIRED) INCLUDE(${ITK_USE_FILE})

ADD_EXECUTABLE(DiscreteGaussianImageFilter DiscreteGaussianImageFilter.cxx) TARGET_LINK_LIBRARIES(DiscreteGaussianImageFilter vtkHybrid ITKBasicFilters ITKIO ITKCommon)

</source>