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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: itkCastImageFilter.h
Language: C++
Date: $Date$
Version: $Revision$
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"
#include "itkProgressReporter.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.
*
* If you need to perform a dimensionaly reduction, you may want
* to use the ExtractImageFilter instead of the CastImageFilter.
*
* \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 ) const
{
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() {}
void GenerateData()
{
if( this->GetInPlace() && this->CanRunInPlace() )
{
// nothing to do, so avoid iterating over all the pixels
// for nothing! Allocate the output, generate a fake progress and exit
this->AllocateOutputs();
ProgressReporter progress(this, 0, 1);
return;
}
Superclass::GenerateData();
}
private:
CastImageFilter(const Self&); //purposely not implemented
void operator=(const Self&); //purposely not implemented
};
} // end namespace itk
#endif
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