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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkMedianProjectionImageFilter.h,v $
Language: C++
Date: $Date: 2008-02-08 04:52:21 $
Version: $Revision: 1.1 $
Copyright (c) Insight Software Consortium. All rights reserved.
See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notices for more information.
=========================================================================*/
#ifndef __itkMedianProjectionImageFilter_h
#define __itkMedianProjectionImageFilter_h
#include "itkProjectionImageFilter.h"
#include "itkNumericTraits.h"
#include "itkConceptChecking.h"
#include <vector>
#include <algorithm>
namespace itk {
/** \class MedianProjectionImageFilter
* \brief Median projection
*
* This class was contributed to the Insight Journal by Gaetan Lehmann.
* The original paper can be found at
* http://insight-journal.org/midas/handle.php?handle=1926/164
*
*
* \author Gatan Lehmann. Biologie du Dveloppement et de la Reproduction,
* INRA de Jouy-en-Josas, France.
*
* \sa ProjectionImageFilter
* \sa StandardDeviationProjectionImageFilter
* \sa SumProjectionImageFilter
* \sa BinaryProjectionImageFilter
* \sa MaximumProjectionImageFilter
* \sa MinimumProjectionImageFilter
* \sa MeanProjectionImageFilter
*/
namespace Function {
template <class TInputPixel>
class MedianAccumulator
{
public:
MedianAccumulator( unsigned long size )
{
m_Values.reserve( size );
}
~MedianAccumulator(){}
inline void Initialize()
{
m_Values.clear();
}
inline void operator()( const TInputPixel &input )
{
m_Values.push_back( input );
}
inline TInputPixel GetValue()
{
typedef typename std::vector<TInputPixel>::iterator ContainerIterator;
ContainerIterator medianIterator = m_Values.begin() + m_Values.size() / 2;
std::nth_element(m_Values.begin(), medianIterator, m_Values.end() );
return *medianIterator;
}
std::vector<TInputPixel> m_Values;
};
} // end namespace Function
template <class TInputImage, class TOutputImage>
class ITK_EXPORT MedianProjectionImageFilter : public
ProjectionImageFilter<TInputImage, TOutputImage,
Function::MedianAccumulator< typename TInputImage::PixelType > >
{
public:
typedef MedianProjectionImageFilter Self;
typedef ProjectionImageFilter<TInputImage, TOutputImage,
Function::MedianAccumulator<
typename TInputImage::PixelType > > Superclass;
typedef SmartPointer<Self> Pointer;
typedef SmartPointer<const Self> ConstPointer;
/** Runtime information support. */
itkTypeMacro(MedianProjectionImageFilter, ProjectionImageFilter);
/** Method for creation through the object factory. */
itkNewMacro(Self);
#ifdef ITK_USE_CONCEPT_CHECKING
/** Begin concept checking */
/** End concept checking */
#endif
protected:
MedianProjectionImageFilter() {}
virtual ~MedianProjectionImageFilter() {}
private:
MedianProjectionImageFilter(const Self&); //purposely not implemented
void operator=(const Self&); //purposely not implemented
}; // end MedianProjectionImageFilter
} //end namespace itk
#endif
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