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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkVectorRescaleIntensityImageFilter.h,v $
Language: C++
Date: $Date: 2008-01-28 17:24:05 $
Version: $Revision: 1.6 $
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 __itkVectorRescaleIntensityImageFilter_h
#define __itkVectorRescaleIntensityImageFilter_h
#include "itkUnaryFunctorImageFilter.h"
namespace itk
{
// This functor class applies a scaling transformation A.x
// to input values.
namespace Functor {
template< typename TInput, typename TOutput>
class VectorMagnitudeLinearTransform
{
public:
typedef typename NumericTraits< typename TInput::ValueType >::RealType RealType;
VectorMagnitudeLinearTransform() {}
~VectorMagnitudeLinearTransform() {}
void SetFactor( RealType a ) { m_Factor = a; }
itkStaticConstMacro(VectorDimension,unsigned int,TInput::Dimension);
bool operator!=( const VectorMagnitudeLinearTransform & other ) const
{
if( m_Factor != other.m_Factor )
{
return true;
}
return false;
}
bool operator==( const VectorMagnitudeLinearTransform & other ) const
{
return !(*this != other);
}
inline TOutput operator()( const TInput & x )
{
TOutput result;
for(unsigned int i=0; i<VectorDimension; i++)
{
const RealType scaledComponent = static_cast<RealType>( x[i] ) * m_Factor;
result[i]= static_cast< typename TOutput::ValueType >( scaledComponent );
}
return result;
}
private:
RealType m_Factor;
};
} // end namespace functor
/** \class VectorRescaleIntensityImageFilter
* \brief Applies a linear transformation to the magnitude of pixel vectors in a
* vector Image.
*
* VectorRescaleIntensityImageFilter applies pixel-wise a linear transformation
* to the intensity values of input image pixels. The linear transformation is
* defined by the user in terms of the maximum magnitude value of the vectors
* in the pixels that the output image should have.
*
* All computations are performed in the precison of the input pixel's
* RealType. Before assigning the computed value to the output pixel.
*
* \sa RescaleIntensityImageFilter
*
* \ingroup IntensityImageFilters Multithreaded
*
*/
template <typename TInputImage, typename TOutputImage=TInputImage>
class ITK_EXPORT VectorRescaleIntensityImageFilter :
public
UnaryFunctorImageFilter<TInputImage,TOutputImage,
Functor::VectorMagnitudeLinearTransform<
typename TInputImage::PixelType,
typename TOutputImage::PixelType> >
{
public:
/** Standard class typedefs. */
typedef VectorRescaleIntensityImageFilter Self;
typedef UnaryFunctorImageFilter<TInputImage,TOutputImage,
Functor::VectorMagnitudeLinearTransform<
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 InputPixelType::ValueType InputValueType;
typedef typename OutputPixelType::ValueType OutputValueType;
typedef typename NumericTraits<InputValueType>::RealType InputRealType;
typedef typename NumericTraits<OutputValueType>::RealType OutputRealType;
typedef typename Superclass::InputImageType InputImageType;
typedef typename Superclass::InputImagePointer InputImagePointer;
/** Run-time type information (and related methods). */
itkTypeMacro( VectorRescaleIntensityImageFilter, UnaryFunctorImageFilter );
/** Method for creation through the object factory. */
itkNewMacro(Self);
itkSetMacro( OutputMaximumMagnitude, OutputRealType );
itkGetConstReferenceMacro( OutputMaximumMagnitude, OutputRealType );
/** Get the Scale and Shift used for the linear transformation
of magnitude values.
\warning These Values are only valid after the filter has been updated */
itkGetConstReferenceMacro( Scale, InputRealType );
itkGetConstReferenceMacro( Shift, InputRealType );
/** Get the Maximum value of the input image magnitudes.
\warning These Values are only valid after the filter has been updated */
itkGetConstReferenceMacro( InputMaximumMagnitude, InputRealType );
/** Process to execute before entering the multithreaded section */
void BeforeThreadedGenerateData(void);
/** Print internal ivars */
void PrintSelf(std::ostream& os, Indent indent) const;
#ifdef ITK_USE_CONCEPT_CHECKING
/** Begin concept checking */
itkConceptMacro(InputHasNumericTraitsCheck,
(Concept::HasNumericTraits<InputValueType>));
itkConceptMacro(OutputHasNumericTraitsCheck,
(Concept::HasNumericTraits<OutputValueType>));
/** End concept checking */
#endif
protected:
VectorRescaleIntensityImageFilter();
virtual ~VectorRescaleIntensityImageFilter() {};
private:
VectorRescaleIntensityImageFilter(const Self&); //purposely not implemented
void operator=(const Self&); //purposely not implemented
InputRealType m_Scale;
InputRealType m_Shift;
InputRealType m_InputMaximumMagnitude;
OutputRealType m_OutputMaximumMagnitude;
};
} // end namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
#include "itkVectorRescaleIntensityImageFilter.txx"
#endif
#endif
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