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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 itkAtan2ImageFilter_h
#define itkAtan2ImageFilter_h
#include "itkBinaryFunctorImageFilter.h"
#include "itkMath.h"
namespace itk
{
namespace Functor
{
/**
* \class Atan2
* \brief
* \ingroup ITKImageIntensity
*/
template< typename TInput1, typename TInput2, typename TOutput >
class Atan2
{
public:
Atan2() {}
~Atan2() {}
bool operator!=(const Atan2 &) const
{
return false;
}
bool operator==(const Atan2 & other) const
{
return !( *this != other );
}
inline TOutput operator()(const TInput1 & A, const TInput2 & B) const
{
return static_cast< TOutput >(
std::atan2(
static_cast< double >( A ),
static_cast< double >( B ) )
);
}
};
}
/** \class Atan2ImageFilter
* \brief Computes two argument inverse tangent.
*
* The first argument to the atan function is provided by a pixel
* in the first input image (SetInput1()) and the corresponding
* pixel in the second input image (SetInput2()) is used as the second
* argument.
*
* 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.
*
* Both pixel input types are cast to \c double in order to be
* used as parameters of \c std::atan2(). The resulting \c double value
* is cast to the output pixel type.
*
* \ingroup IntensityImageFilters
* \ingroup MultiThreaded
* \ingroup ITKImageIntensity
*
* \wiki
* \wikiexample{Math/Trig/Atan2ImageFilter,Compute the arctangent of each pixel.}
* \endwiki
*/
template< typename TInputImage1, typename TInputImage2, typename TOutputImage >
class Atan2ImageFilter:
public
BinaryFunctorImageFilter< TInputImage1, TInputImage2, TOutputImage,
Functor::Atan2<
typename TInputImage1::PixelType,
typename TInputImage2::PixelType,
typename TOutputImage::PixelType > >
{
public:
/** Standard class typedefs. */
typedef Atan2ImageFilter Self;
typedef BinaryFunctorImageFilter< TInputImage1, TInputImage2, TOutputImage,
Functor::Atan2<
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(Atan2ImageFilter,
BinaryFunctorImageFilter);
#ifdef ITK_USE_CONCEPT_CHECKING
// Begin concept checking
itkConceptMacro( Input1ConvertibleToDoubleCheck,
( Concept::Convertible< typename TInputImage1::PixelType, double > ) );
itkConceptMacro( Input2ConvertibleToDoubleCheck,
( Concept::Convertible< typename TInputImage2::PixelType, double > ) );
itkConceptMacro( DoubleConvertibleToOutputCheck,
( Concept::Convertible< double, typename TOutputImage::PixelType > ) );
// End concept checking
#endif
protected:
Atan2ImageFilter() {}
virtual ~Atan2ImageFilter() ITK_OVERRIDE {}
private:
ITK_DISALLOW_COPY_AND_ASSIGN(Atan2ImageFilter);
};
} // end namespace itk
#endif
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