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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkMaskImageFilter.h,v $
Language: C++
Date: $Date: 2007-09-27 11:36:40 $
Version: $Revision: 1.14 $
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 __itkMaskImageFilter_h
#define __itkMaskImageFilter_h
#include "itkBinaryFunctorImageFilter.h"
#include "itkNumericTraits.h"
namespace itk
{
/** \class MaskImageFilter
* \brief Implements an operator for pixel-wise masking of the input
* image with the mask.
*
* This class is parametrized over the types of the
* input image type, the mask image type and the type of the output image.
* Numeric conversions (castings) are done by the C++ defaults.
*
* The pixel type of the input 2 image must have a valid defintion of the
* operator != with zero. This condition is required because internally this
* filter will perform the operation
*
* if pixel_from_mask_image != 0
* pixel_output_image = pixel_input_image
* else
* pixel_output_image = 0
*
* The pixel from the input 1 is cast to the pixel type of the output image.
*
* Note that the input and the mask images must be of the same size.
*
* \warning Any pixel value other than 0 will not be masked out.
*
* \sa MaskNegatedImageFilter
* \ingroup IntensityImageFilters Multithreaded
*/
namespace Functor {
template< class TInput, class TMask, class TOutput=TInput >
class MaskInput
{
public:
typedef typename NumericTraits< TInput >::AccumulateType AccumulatorType;
MaskInput(): m_OutsideValue(NumericTraits< TOutput >::ZeroValue()) {};
~MaskInput() {};
bool operator!=( const MaskInput & ) const
{
return false;
}
bool operator==( const MaskInput & other ) const
{
return !(*this != other);
}
inline TOutput operator()( const TInput & A, const TMask & B)
{
if (B != NumericTraits< TMask >::ZeroValue() )
{
return static_cast<TOutput>( A );
}
else
{
return m_OutsideValue;
}
}
/** Method to explicitly set the outside value of the mask */
void SetOutsideValue( const TOutput &outsideValue )
{
m_OutsideValue = outsideValue;
}
/** Method to get the outside value of the mask */
const TOutput &GetOutsideValue() const
{
return m_OutsideValue;
}
private:
TOutput m_OutsideValue;
};
}
template <class TInputImage, class TMaskImage, class TOutputImage=TInputImage>
class ITK_EXPORT MaskImageFilter :
public
BinaryFunctorImageFilter<TInputImage,TMaskImage,TOutputImage,
Functor::MaskInput<
typename TInputImage::PixelType,
typename TMaskImage::PixelType,
typename TOutputImage::PixelType> >
{
public:
/** Standard class typedefs. */
typedef MaskImageFilter Self;
typedef BinaryFunctorImageFilter<TInputImage,TMaskImage,TOutputImage,
Functor::MaskInput<
typename TInputImage::PixelType,
typename TMaskImage::PixelType,
typename TOutputImage::PixelType>
> Superclass;
typedef SmartPointer<Self> Pointer;
typedef SmartPointer<const Self> ConstPointer;
/** Method for creation through the object factory. */
itkNewMacro(Self);
/** Runtime information support. */
itkTypeMacro(MaskImageFilter,
BinaryFunctorImageFilter);
/** Method to explicitly set the outside value of the mask. Defaults to 0 */
void SetOutsideValue( const typename TOutputImage::PixelType & outsideValue )
{
if( this->GetOutsideValue() != outsideValue )
{
this->Modified();
this->GetFunctor().SetOutsideValue( outsideValue );
}
}
const typename TOutputImage::PixelType & GetOutsideValue() const
{
return this->GetFunctor().GetOutsideValue();
}
#ifdef ITK_USE_CONCEPT_CHECKING
/** Begin concept checking */
itkConceptMacro(MaskEqualityComparableCheck,
(Concept::EqualityComparable<typename TMaskImage::PixelType>));
itkConceptMacro(InputConvertibleToOutputCheck,
(Concept::Convertible<typename TInputImage::PixelType,
typename TOutputImage::PixelType>));
/** End concept checking */
#endif
protected:
MaskImageFilter() {}
virtual ~MaskImageFilter() {}
void PrintSelf(std::ostream &os, Indent indent) const
{
Superclass::PrintSelf(os, indent);
os << indent << "OutsideValue: " << this->GetOutsideValue() << std::endl;
}
private:
MaskImageFilter(const Self&); //purposely not implemented
void operator=(const Self&); //purposely not implemented
};
} // end namespace itk
#endif
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