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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 itkAddImageFilter_h
#define itkAddImageFilter_h
#include "itkBinaryFunctorImageFilter.h"
#include "itkNumericTraits.h"
namespace itk
{
namespace Functor
{
/**
* \class Add2
* \brief
* \ingroup ITKImageIntensity
*/
template< typename TInput1, typename TInput2 = TInput1, typename TOutput = TInput1 >
class Add2
{
public:
Add2() {}
~Add2() {}
bool operator!=(const Add2 &) const
{
return false;
}
bool operator==(const Add2 & other) const
{
return !( *this != other );
}
inline TOutput operator()(const TInput1 & A, const TInput2 & B) const
{
return static_cast< TOutput >( A + B );
}
};
}
/** \class AddImageFilter
* \brief Pixel-wise addition of two 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.
*
* The pixel type of the input 1 image must have a valid definition of
* the operator+ with a pixel type of the image 2. This condition is
* required because internally this filter will perform the operation
*
* \code
* pixel_from_image_1 + pixel_from_image_2
* \endcode
*
* Additionally the type resulting from the sum, will be cast to
* the pixel type of the output image.
*
* The total operation over one pixel will be
* \code
* output_pixel = static_cast<OutputPixelType>( input1_pixel + input2_pixel )
* \endcode
*
* For example, this filter could be used directly for adding images whose
* pixels are vectors of the same dimension, and to store the resulting vector
* in an output image of vector pixels.
*
* The images to be added are set using the methods:
* \code
* SetInput1( image1 );
* SetInput2( image2 );
* \endcode
*
* Additionally, this filter can be used to add a constant to every pixel of an
* image by using
* \code
* SetInput1( image1 );
* SetConstant2( constant );
* \endcode
*
* \warning No numeric overflow checking is performed in this filter.
*
* \ingroup IntensityImageFilters MultiThreaded
* \ingroup ITKImageIntensity
*
* \wiki
* \wikiexample{ImageProcessing/AddImageFilter,Add two images together}
* \wikiexample{ImageProcessing/AddConstantToImageFilter,Add a constant to every pixel in an image}
* \endwiki
*/
template< typename TInputImage1, typename TInputImage2 = TInputImage1, typename TOutputImage = TInputImage1 >
class AddImageFilter:
public
BinaryFunctorImageFilter< TInputImage1, TInputImage2, TOutputImage,
Functor::Add2<
typename TInputImage1::PixelType,
typename TInputImage2::PixelType,
typename TOutputImage::PixelType > >
{
public:
/** Standard class typedefs. */
typedef AddImageFilter Self;
typedef BinaryFunctorImageFilter< TInputImage1, TInputImage2, TOutputImage,
Functor::Add2<
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(AddImageFilter,
BinaryFunctorImageFilter);
#ifdef ITK_USE_CONCEPT_CHECKING
// Begin concept checking
itkConceptMacro( Input1Input2OutputAdditiveOperatorsCheck,
( Concept::AdditiveOperators< typename TInputImage1::PixelType,
typename TInputImage2::PixelType,
typename TOutputImage::PixelType > ) );
// End concept checking
#endif
protected:
AddImageFilter() {}
virtual ~AddImageFilter() {}
private:
AddImageFilter(const Self &) ITK_DELETE_FUNCTION;
void operator=(const Self &) ITK_DELETE_FUNCTION;
};
} // end namespace itk
#endif
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