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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 itkCosImageFilter_h
#define itkCosImageFilter_h
#include "itkUnaryFunctorImageFilter.h"
#include "itkMath.h"
namespace itk
{
namespace Functor
{
/**
* \class Cos
* \brief
* \ingroup ITKImageIntensity
*/
template< typename TInput, typename TOutput >
class Cos
{
public:
Cos() {}
~Cos() {}
bool operator!=(const Cos &) const
{
return false;
}
bool operator==(const Cos & other) const
{
return !( *this != other );
}
inline TOutput operator()(const TInput & A) const
{
return static_cast< TOutput >( std::cos( static_cast< double >( A ) ) );
}
};
}
/** \class CosImageFilter
* \brief Computes the cosine of each pixel.
*
* This filter is templated over the pixel type of the input image
* and the pixel type of the output image.
*
* The filter walks over all of the pixels in the input image, and for
* each pixel does the following:
*
* \li cast the pixel value to \c double,
* \li apply the \c std::cos() function to the \c double value,
* \li cast the \c double value resulting from \c std::cos() to the pixel type of the output image,
* \li store the cast value into the output image.
*
* The filter expects both images to have the same dimension (e.g. both
* 2D, or both 3D, or both ND)
*
* \ingroup IntensityImageFilters
* \ingroup MultiThreaded
* \ingroup ITKImageIntensity
*/
template< typename TInputImage, typename TOutputImage >
class CosImageFilter:
public
UnaryFunctorImageFilter< TInputImage, TOutputImage,
Functor::Cos<
typename TInputImage::PixelType,
typename TOutputImage::PixelType > >
{
public:
/** Standard class typedefs. */
typedef CosImageFilter Self;
typedef UnaryFunctorImageFilter<
TInputImage, TOutputImage,
Functor::Cos< 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);
/** Runtime information support. */
itkTypeMacro(CosImageFilter,
UnaryFunctorImageFilter);
#ifdef ITK_USE_CONCEPT_CHECKING
// Begin concept checking
itkConceptMacro( InputConvertibleToDoubleCheck,
( Concept::Convertible< typename TInputImage::PixelType, double > ) );
itkConceptMacro( DoubleConvertibleToOutputCheck,
( Concept::Convertible< double, typename TOutputImage::PixelType > ) );
// End concept checking
#endif
protected:
CosImageFilter() {}
virtual ~CosImageFilter() ITK_OVERRIDE {}
private:
ITK_DISALLOW_COPY_AND_ASSIGN(CosImageFilter);
};
} // end namespace itk
#endif
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