ITK/Examples/Developer/ImageFilter

#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;
}

#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

#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