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/*=========================================================================
*
* Copyright Insight Software Consortium
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*=========================================================================*/
#ifndef itkPowImageFilter_h
#define itkPowImageFilter_h
#include "itkBinaryFunctorImageFilter.h"
#include "itkNumericTraits.h"
namespace itk
{
namespace Functor
{
/**
* \class Pow
* \brief
* \ingroup ITKImageIntensity
*/
template< typename TInput1, typename TInput2 = TInput1, typename TOutput = TInput1 >
class Pow
{
public:
;
Pow() {}
bool operator!=(const Pow &) const
{
// we contain no data, so we are always the same
return false;
}
bool operator==(const Pow & other) const
{
return !( *this != other );
}
inline TOutput operator()(const TInput1 & A, const TInput2 & B) const
{
typedef typename NumericTraits< TInput1 >::RealType RealType1;
typedef typename NumericTraits< TInput2 >::RealType RealType2;
return static_cast< TOutput >( std::pow(static_cast<RealType1>(A),static_cast<RealType2>(B)) );
}
};
}
/** \class PowImageFilter
* \brief Computes the powers of 2 images
*
* This class is templated over the types of the two
* input images and the type of the output image.
* Numeric conversions (castings) are done by the C++ defaults.
*
* The output of the pow function will be cast to the pixel type of
* the output image.
*
* The total operation over one pixel will be
* \code
* output_pixel = static_cast< TOutput >( std::pow(static_cast<RealType>(A),static_cast<RealType>(B)) );
* \endcode
*
* The pow function can be applied to two images with the following:
* \code
* SetInput1( image1 );
* SetInput2( image2 );
* \endcode
*
* Additionally, this filter can be used to raise every pixel of an
* image to a power of a constant by using
* \code
* SetInput1( image1 );
* SetConstant2( constant );
* \endcode
*
* \ingroup IntensityImageFilters MultiThreaded
* \ingroup ITKImageIntensity
*
*/
template< typename TInputImage1, typename TInputImage2 = TInputImage1, typename TOutputImage = TInputImage1 >
class PowImageFilter:
public
BinaryFunctorImageFilter< TInputImage1, TInputImage2, TOutputImage,
Functor::Pow<
typename TInputImage1::PixelType,
typename TInputImage2::PixelType,
typename TOutputImage::PixelType > >
{
public:
/** Standard class typedefs. */
typedef PowImageFilter Self;
typedef BinaryFunctorImageFilter< TInputImage1, TInputImage2, TOutputImage,
Functor::Pow<
typename TInputImage1::PixelType,
typename TInputImage2::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(PowImageFilter,
BinaryFunctorImageFilter);
#ifdef ITK_USE_CONCEPT_CHECKING
// Begin concept checking
// End concept checking
#endif
protected:
PowImageFilter() {}
// virtual ~PowImageFilter() {} default implementation OK
private:
ITK_DISALLOW_COPY_AND_ASSIGN(PowImageFilter);
};
} // end namespace itk
#endif
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