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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkInvertIntensityImageFilter.h,v $
Language: C++
Date: $Date: 2007-09-27 11:36:40 $
Version: $Revision: 1.4 $
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 __itkInvertIntensityImageFilter_h
#define __itkInvertIntensityImageFilter_h
#include "itkUnaryFunctorImageFilter.h"
namespace itk
{
namespace Functor {
template< typename TInput, typename TOutput>
class InvertIntensityTransform
{
public:
typedef typename NumericTraits< TInput >::RealType RealType;
InvertIntensityTransform() {m_Maximum = NumericTraits< TInput >::max();}
~InvertIntensityTransform() {}
void SetMaximum( TOutput max ) { m_Maximum = max; }
bool operator!=( const InvertIntensityTransform & other ) const
{
if( m_Maximum != other.m_Maximum )
{
return true;
}
return false;
}
bool operator==( const InvertIntensityTransform & other ) const
{
return !(*this != other);
}
inline TOutput operator()( const TInput & x )
{
TOutput result = static_cast<TOutput>( m_Maximum - x );
return result;
}
private:
TInput m_Maximum;
};
} // end namespace functor
/** \class InvertIntensityImageFilter
* \brief Invert intensity of an image
*
* InvertIntensityImageFilter invert intensity of pixels by
* subtracting pixel value to a maximum value. The maximum value can
* be set with SetMaximum and defaults the maximum of input pixel
* type. This filter can be used to invert, for example, a binary
* image, a distance map, etc.
*
* \author Gatan Lehmann. Biologie du Dveloppement et de la Reproduction, INRA de Jouy-en-Josas, France.
*
* \sa IntensityWindowingImageFilter ShiftScaleImageFilter
* \ingroup IntensityImageFilters Multithreaded
*
*/
template <typename TInputImage, typename TOutputImage=TInputImage>
class ITK_EXPORT InvertIntensityImageFilter :
public
UnaryFunctorImageFilter<TInputImage,TOutputImage,
Functor::InvertIntensityTransform<
typename TInputImage::PixelType,
typename TOutputImage::PixelType> >
{
public:
/** Standard class typedefs. */
typedef InvertIntensityImageFilter Self;
typedef UnaryFunctorImageFilter<TInputImage,TOutputImage,
Functor::InvertIntensityTransform<
typename TInputImage::PixelType,
typename TOutputImage::PixelType> > Superclass;
typedef SmartPointer<Self> Pointer;
typedef SmartPointer<const Self> ConstPointer;
typedef typename TOutputImage::PixelType OutputPixelType;
typedef typename TInputImage::PixelType InputPixelType;
typedef typename NumericTraits<InputPixelType>::RealType RealType;
/** Method for creation through the object factory. */
itkNewMacro(Self);
/** Runtime information support. */
itkTypeMacro(InvertIntensityImageFilter,
UnaryFunctorImageFilter);
itkSetMacro( Maximum, InputPixelType );
itkGetConstReferenceMacro( Maximum, InputPixelType );
/** Print internal ivars */
void PrintSelf(std::ostream& os, Indent indent) const;
/** Process to execute before entering the multithreaded section */
void BeforeThreadedGenerateData(void);
#ifdef ITK_USE_CONCEPT_CHECKING
/** Begin concept checking */
itkConceptMacro(InputHasNumericTraitsCheck,
(Concept::HasNumericTraits<InputPixelType>));
/** End concept checking */
#endif
protected:
InvertIntensityImageFilter();
virtual ~InvertIntensityImageFilter() {};
private:
InvertIntensityImageFilter(const Self&); //purposely not implemented
void operator=(const Self&); //purposely not implemented
InputPixelType m_Maximum;
};
} // end namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
#include "itkInvertIntensityImageFilter.txx"
#endif
#endif
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