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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkAtan2ImageFilter.h,v $
Language: C++
Date: $Date: 2007-09-27 11:36:39 $
Version: $Revision: 1.20 $
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 __itkAtan2ImageFilter_h
#define __itkAtan2ImageFilter_h
#include "itkBinaryFunctorImageFilter.h"
#include "vnl/vnl_math.h"
namespace itk
{
/** \class Atan2ImageFilter
* \brief Computes arctangent pixel-wise from two images.
*
* This class is parametrized 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 casted to \c double in order to be
* used as parameters of \c vcl_atan2(). The resulting \c double value
* is casted to the output pixel type.
*
* \ingroup IntensityImageFilters Multithreaded
*/
namespace Functor {
template< class TInput1, class TInput2, class 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)
{
return static_cast<TOutput>(
vcl_atan2(
static_cast<double>(A),
static_cast<double>(B) )
);
}
};
}
template <class TInputImage1, class TInputImage2, class TOutputImage>
class ITK_EXPORT 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() {}
private:
Atan2ImageFilter(const Self&); //purposely not implemented
void operator=(const Self&); //purposely not implemented
};
} // end namespace itk
#endif
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