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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkCastImageFilter.h,v $
Language: C++
Date: $Date: 2007-08-20 17:57:01 $
Version: $Revision: 1.13 $
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 __itkCastImageFilter_h
#define __itkCastImageFilter_h
#include "itkUnaryFunctorImageFilter.h"
namespace itk
{
/** \class CastImageFilter
*
* \brief Casts input pixels to output pixel type.
*
* This filter is templated over the input image type
* and the output image type.
*
* CastImageFilter allows the input and output image to be different
* dimensions. This is useful if you want to cast an 2D image to
* 3D image. The resulting 3D image will have a single slice. If you
* attempt to cast an image to a lower dimension, the first "slice"
* (or line or volume) will be extracted. If you want to convert
* an image to a lower dimension and specify the subspace (i.e. which
* slice of a volume, etc.) then you should use ExtractImageFilter.
*
* \ingroup IntensityImageFilters Multithreaded
* \sa UnaryFunctorImageFilter
* \sa ExtractImageFilter
*/
namespace Functor {
template< class TInput, class TOutput>
class Cast
{
public:
Cast() {};
virtual ~Cast() {};
bool operator!=( const Cast & ) const
{
return false;
}
bool operator==( const Cast & other ) const
{
return !(*this != other);
}
inline TOutput operator()( const TInput & A )
{
return static_cast<TOutput>( A );
}
};
}
template <class TInputImage, class TOutputImage>
class ITK_EXPORT CastImageFilter :
public
UnaryFunctorImageFilter<TInputImage,TOutputImage,
Functor::Cast<
typename TInputImage::PixelType,
typename TOutputImage::PixelType> >
{
public:
/** Standard class typedefs. */
typedef CastImageFilter Self;
typedef UnaryFunctorImageFilter<TInputImage,TOutputImage,
Functor::Cast<
typename TInputImage::PixelType,
typename TOutputImage::PixelType>
> Superclass;
typedef SmartPointer<Self> Pointer;
typedef SmartPointer<const Self> ConstPointer;
/** Method for creation through the object factory. */
itkNewMacro(Self);
/** Run-time type information (and related methods). */
itkTypeMacro(CastImageFilter, UnaryFunctorImageFilter);
#ifdef ITK_USE_CONCEPT_CHECKING
/** Begin concept checking */
itkConceptMacro(InputConvertibleToOutputCheck,
(Concept::Convertible<typename TInputImage::PixelType,
typename TOutputImage::PixelType>));
/** End concept checking */
#endif
protected:
CastImageFilter() {}
virtual ~CastImageFilter() {}
private:
CastImageFilter(const Self&); //purposely not implemented
void operator=(const Self&); //purposely not implemented
};
} // end namespace itk
#endif
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