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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkAcosImageFilter.h,v $
Language: C++
Date: $Date: 2007-09-27 11:36:39 $
Version: $Revision: 1.23 $
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 __itkAcosImageFilter_h
#define __itkAcosImageFilter_h
#include "itkUnaryFunctorImageFilter.h"
#include "vnl/vnl_math.h"
namespace itk
{
/** \class AcosImageFilter
* \brief Computes the vcl_acos(x) pixel-wise.
*
* This filter is templated over the pixel type of the input image
* and the pixel type of the output image.
*
* The filter will walk over all the pixels in the input image, and for
* each one of them it will do the following:
*
* - cast the pixel value to \c double,
* - apply the \c vcl_acos() function to the \c double value
* - cast the \c double value resulting from \c vcl_acos() to the pixel type
* of the output image
* - store the casted value into the output image.
*
* The filter expect both images to have the same dimension (e.g. both 2D,
* or both 3D, or both ND).
*
* \ingroup IntensityImageFilters Multithreaded
*/
namespace Functor {
template< class TInput, class TOutput>
class Acos
{
public:
Acos() {};
~Acos() {};
bool operator!=( const Acos & ) const
{
return false;
}
bool operator==( const Acos & other ) const
{
return !(*this != other);
}
inline TOutput operator()( const TInput & A )
{
return static_cast<TOutput>( vcl_acos(static_cast<double>(A) ) );
}
};
}
template <class TInputImage, class TOutputImage>
class ITK_EXPORT AcosImageFilter :
public
UnaryFunctorImageFilter<TInputImage,TOutputImage,
Functor::Acos<
typename TInputImage::PixelType,
typename TOutputImage::PixelType> >
{
public:
/** Standard class typedefs. */
typedef AcosImageFilter Self;
typedef UnaryFunctorImageFilter<TInputImage,TOutputImage,
Functor::Acos< 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(AcosImageFilter,
UnaryFunctorImageFilter);
#ifdef ITK_USE_CONCEPT_CHECKING
/** Begin concept checking */
itkConceptMacro(InputCovertibleToDoubleCheck,
(Concept::Convertible<typename TInputImage::PixelType, double>));
itkConceptMacro(DoubleConvertibleToOutputCheck,
(Concept::Convertible<double, typename TOutputImage::PixelType>));
/** End concept checking */
#endif
protected:
AcosImageFilter() {}
virtual ~AcosImageFilter() {}
private:
AcosImageFilter(const Self&); //purposely not implemented
void operator=(const Self&); //purposely not implemented
};
} // end namespace itk
#endif
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