ITK/Examples/Developer/ImageFilter: Difference between revisions

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(Created page with "This example demonstrates the creation of a filter which produces the output image which is equal to the input image except its pixel on the main diagonal are turned to white. =...")
 
(Deprecated content that is moved to sphinx)
 
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This example demonstrates the creation of a filter which produces the output image which is equal to the input image except its pixel on the main diagonal are turned to white.
{{warning|1=The media wiki content on this page is no longer maintained.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.}}
 
==ImageFilterExample.cxx==
<source lang="cpp">
#include "itkImage.h"
#include "itkImageFileReader.h"
#include "itkImageFileWriter.h"
 
#include "ImageFilter.h"
 
int main(int, char*[])
{
  // Setup types
  typedef itk::Image<unsigned char, 2>  ImageType;
  typedef itk::ImageFilter<ImageType>  FilterType;
 
  typedef itk::ImageFileReader<ImageType> ReaderType;
  ReaderType::Pointer reader = ReaderType::New();
  reader->SetFileName("Test.jpg");
  reader->Update();
 
  // Create and the filter
  FilterType::Pointer filter = FilterType::New();
  filter->SetInput(reader->GetOutput());
  filter->Update();
 
  typedef itk::ImageFileWriter< ImageType  > WriterType;
  WriterType::Pointer writer = WriterType::New();
  writer->SetFileName("TestOutput.jpg");
  writer->SetInput(filter->GetOutput());
  writer->Update();
 
  return EXIT_SUCCESS;
}
</source>
 
==ImageFilter.h==
<source lang="cpp">
#ifndef __itkImageFilter_h
#define __itkImageFilter_h
 
#include "itkImageToImageFilter.h"
 
namespace itk
{
template< class TImage>
class ImageFilter:public ImageToImageFilter< TImage, TImage >
{
public:
  /** Standard class typedefs. */
  typedef ImageFilter            Self;
   typedef ImageToImageFilter< TImage, TImage > Superclass;
  typedef SmartPointer< Self >        Pointer;
 
  /** Method for creation through the object factory. */
  itkNewMacro(Self);
 
  /** Run-time type information (and related methods). */
  itkTypeMacro(ImageFilter, ImageToImageFilter);
 
protected:
  ImageFilter(){}
  ~ImageFilter(){}
 
  /** Does the real work. */
  virtual void GenerateData();
 
private:
  ImageFilter(const Self &); //purposely not implemented
  void operator=(const Self &);  //purposely not implemented
 
};
} //namespace ITK
 
 
#ifndef ITK_MANUAL_INSTANTIATION
#include "ImageFilter.txx"
#endif
 
 
#endif // __itkImageFilter_h
</source>
 
==ImageFilter.txx==
<source lang="cpp">
#ifndef __itkImageFilter_txx
#define __itkImageFilter_txx
 
#include "ImageFilter.h"
#include "itkObjectFactory.h"
#include "itkImageRegionIterator.h"
#include "itkImageRegionConstIterator.h"
 
namespace itk
{
 
template< class TImage>
void ImageFilter< TImage>
::GenerateData()
{
  typename TImage::ConstPointer input = this->GetInput();
 
  typename TImage::Pointer output = this->GetOutput();
  output->SetRegions(input->GetLargestPossibleRegion());
  output->Allocate(); 
 
  itk::ImageRegionIterator<TImage> outputIterator(output, output->GetLargestPossibleRegion());
  itk::ImageRegionConstIterator<TImage> inputIterator(input, input->GetLargestPossibleRegion());
 
  while(!outputIterator.IsAtEnd())
    {
    if(inputIterator.GetIndex()[0] == inputIterator.GetIndex()[1])
      {
      outputIterator.Set(255);
      }
    else
      {
      outputIterator.Set(inputIterator.Get());
      }
 
    ++inputIterator;
    ++outputIterator;
    }
 
}
 
}// end namespace
 
 
#endif
</source>
 
==CMakeLists.txt==
<source lang="cmake">
cmake_minimum_required(VERSION 2.6)
 
PROJECT(ImageFilter)
 
FIND_PACKAGE(ITK REQUIRED)
INCLUDE(${ITK_USE_FILE})
 
ADD_EXECUTABLE(ImageFilter ImageFilterExample.cxx)
TARGET_LINK_LIBRARIES(ImageFilter ITKBasicFilters ITKIO ITKCommon)
 
</source>

Latest revision as of 17:54, 7 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.