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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 itkMinimumImageFilter_h
#define itkMinimumImageFilter_h
#include "itkBinaryFunctorImageFilter.h"
namespace itk
{
namespace Functor
{
/**
* \class Minimum
* \brief
* \ingroup ITKImageIntensity
*/
template< typename TInput1, typename TInput2 = TInput1, typename TOutput = TInput1 >
class Minimum
{
public:
Minimum() {}
~Minimum() {}
bool operator!=(const Minimum &) const
{
return false;
}
bool operator==(const Minimum & other) const
{
return !( *this != other );
}
inline TOutput operator()(const TInput1 & A, const TInput2 & B) const
{ return static_cast< TOutput >( ( A < B ) ? A : B ); }
};
}
/** \class MinimumImageFilter
* \brief Implements a pixel-wise operator Min(a,b) between two images.
*
* The pixel values of the output image are the minimum between the
* corresponding pixels of the two input 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.
*
* \ingroup IntensityImageFilters
* \ingroup MultiThreaded
* \ingroup ITKImageIntensity
*
* \wiki
* \wikiexample{ImageProcessing/MinimumImageFilter,Pixel wise compare two input images and set the output pixel to their min}
* \endwiki
*/
template< typename TInputImage1, typename TInputImage2 = TInputImage1, typename TOutputImage = TInputImage1 >
class MinimumImageFilter:
public
BinaryFunctorImageFilter< TInputImage1, TInputImage2, TOutputImage,
Functor::Minimum<
typename TInputImage1::PixelType,
typename TInputImage2::PixelType,
typename TOutputImage::PixelType > >
{
public:
/** Standard class typedefs. */
typedef MinimumImageFilter Self;
typedef BinaryFunctorImageFilter<
TInputImage1, TInputImage2, TOutputImage,
Functor::Minimum<
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(MinimumImageFilter,
BinaryFunctorImageFilter);
#ifdef ITK_USE_CONCEPT_CHECKING
// Begin concept checking
itkConceptMacro( Input1ConvertibleToInput2Check,
( Concept::Convertible< typename TInputImage1::PixelType,
typename TInputImage2::PixelType > ) );
itkConceptMacro( Input2ConvertibleToOutputCheck,
( Concept::Convertible< typename TInputImage2::PixelType,
typename TOutputImage::PixelType > ) );
itkConceptMacro( Input1LessThanInput2Check,
( Concept::LessThanComparable< typename TInputImage1::PixelType,
typename TInputImage2::PixelType > ) );
// End concept checking
#endif
protected:
MinimumImageFilter() {}
virtual ~MinimumImageFilter() ITK_OVERRIDE {}
private:
ITK_DISALLOW_COPY_AND_ASSIGN(MinimumImageFilter);
};
} // end namespace itk
#endif
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