ITK/Examples/Functions/GaussianBlurImageFunction: Difference between revisions

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This example shows how to perform Gaussian blur image function on input image, and saves the output as a float or double image type.
{{warning|1=The media wiki content on this page is no longer maintained.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.
==GaussianBlurImageFunction.cxx==
}}
<source lang="cpp">
#if defined(_MSC_VER)
#pragma warning ( disable : 4786 )
#endif
 
#ifdef __BORLANDC__
#define ITK_LEAN_AND_MEAN
#endif
 
#include "itkImage.h"
#include "itkImageFileReader.h"
#include "itkImageFileWriter.h"
#include "itkGaussianBlurImageFunction.h"
#include "itkImageRegionIterator.h"
 
int main( int argc, char * argv[] )
{
  if( argc < 5 ) {
    std::cerr << "Usage: " << std::endl;
    std::cerr << argv[0] << "  inputImageFile  outputImageFile sigma maxKernelWidth" << std::endl;
    return EXIT_FAILURE;
  }
 
  typedef itk::Image< float, 2 >            ImageType;
  typedef itk::ImageFileReader< ImageType >  ReaderType;
  typedef itk::ImageRegionIterator< ImageType > IteratorType;
  typedef itk::ImageRegionConstIterator< ImageType > ConstIteratorType;
 
  ReaderType::Pointer reader = ReaderType::New();
  reader->SetFileName( argv[1] );
  reader->Update();
 
  const ImageType * inputImage = reader->GetOutput();
 
  ImageType::RegionType region = inputImage->GetBufferedRegion();
 
  ConstIteratorType it( inputImage, region );
 
  ImageType::Pointer output = ImageType::New();
 
  output->SetRegions( region );
  output->SetOrigin(  inputImage->GetOrigin()  );
  output->SetSpacing( inputImage->GetSpacing() );
  output->Allocate();
 
  IteratorType out( output, region );
 
  typedef itk::GaussianBlurImageFunction< ImageType > GFunctionType;
  GFunctionType::Pointer gaussianFunction = GFunctionType::New();
  gaussianFunction->SetInputImage( inputImage );
 
  GFunctionType::ErrorArrayType setError;
  setError.Fill( 0.01 );
  gaussianFunction->SetMaximumError( setError );
  gaussianFunction->SetSigma( atof( argv[3] ) );
  gaussianFunction->SetMaximumKernelWidth( atoi( argv[4] ) );
 
  it.GoToBegin();
  out.GoToBegin();
cmake_minimum_required(VERSION 2.6)
   
PROJECT(GaussianBlurImageFunction)
FIND_PACKAGE(ITK REQUIRED)
INCLUDE(${ITK_USE_FILE})
ADD_EXECUTABLE(GaussianBlurImageFunction GaussianBlurImageFunction.cxx)
TARGET_LINK_LIBRARIES(GaussianBlurImageFunction 
ITKCommon ITKBasicFilters ITKIO
${ITK_LILBRARIES})
  while( !it.IsAtEnd() )
    {
    out.Set( gaussianFunction->EvaluateAtIndex(it.GetIndex() ) );
    ++it;
    ++out;
    }
 
   typedef itk::ImageFileWriter < ImageType > WriterType;
  WriterType::Pointer writer = WriterType::New();
  writer->SetFileName(argv[2]);
  writer->SetInput(output);
  writer->Update();
 
  return EXIT_SUCCESS;
}
</source>
 
==CMakeLists.txt==
 
{{#tag:syntaxhighlight
|
 
cmake_minimum_required(VERSION 2.6)
PROJECT(GaussianBlurImageFunction)
FIND_PACKAGE(ITK REQUIRED)
INCLUDE(${ITK_USE_FILE})
ADD_EXECUTABLE(GaussianBlurImageFunction GaussianBlurImageFunction.cxx)
TARGET_LINK_LIBRARIES(GaussianBlurImageFunction 
ITKCommon ITKBasicFilters ITKIO
${ITK_LILBRARIES})
 
|lang=cmake}}

Latest revision as of 16:15, 4 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.