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/*
* Copyright (C) 2005-2020 Centre National d'Etudes Spatiales (CNES)
*
* This file is part of Orfeo Toolbox
*
* https://www.orfeo-toolbox.org/
*
* 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
*
* 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 otbAssociativeSymmetricalSumImageFilter_h
#define otbAssociativeSymmetricalSumImageFilter_h
#include "itkBinaryFunctorImageFilter.h"
namespace otb
{
/** \class AssociativeSymmetricalSumImageFilter
* \brief Implements an asymmetric fusion of line detector image filter.
*
* This class implements a fusion of the output images of
* otb::LineRatioDetector and otb::LineCorrelationDetector
*
* The associative symmetrical sum \f$ \sigma(x, y) \f$ is used to merge information from the
* two detectors:
\f[ \sigma(x, y)=\frac{xy}{1-x-y+2xy} \f] with \f$ x, y \in [0, 1] \f$.
*
*
*
* \ingroup OTBEdge
*/
namespace Functor
{
/** \class AssociativeSymmetricalSum
* \brief Functor used with the AssociativeSymmetricalSumImageFilter.
*
* \ingroup OTBEdge
*/
template <class TInput1, class TInput2, class TOutput>
class ITK_EXPORT AssociativeSymmetricalSum
{
public:
AssociativeSymmetricalSum(){};
virtual ~AssociativeSymmetricalSum()
{
}
inline TOutput operator()(const TInput1 X, const TInput2 Y)
{
TOutput SumXY = 0.;
SumXY += static_cast<TOutput>((X * Y) / (1. - X - Y + (2 * X * Y)));
return (SumXY);
}
};
}
template <class TInputImage1, class TInputImage2, class TOutputImage>
class ITK_EXPORT AssociativeSymmetricalSumImageFilter
: public itk::BinaryFunctorImageFilter<
TInputImage1, TInputImage2, TOutputImage,
Functor::AssociativeSymmetricalSum<typename TInputImage1::PixelType, typename TInputImage2::PixelType, typename TOutputImage::PixelType>>
{
public:
/** Standard class typedefs. */
typedef AssociativeSymmetricalSumImageFilter Self;
typedef itk::BinaryFunctorImageFilter<
TInputImage1, TInputImage2, TOutputImage,
Functor::AssociativeSymmetricalSum<typename TInputImage1::PixelType, typename TInputImage1::PixelType, typename TOutputImage::PixelType>>
Superclass;
typedef itk::SmartPointer<Self> Pointer;
typedef itk::SmartPointer<const Self> ConstPointer;
/** Method for creation through the object factory. */
itkNewMacro(Self);
protected:
AssociativeSymmetricalSumImageFilter()
{
}
~AssociativeSymmetricalSumImageFilter() override
{
}
private:
AssociativeSymmetricalSumImageFilter(const Self&) = delete;
void operator=(const Self&) = delete;
};
} // end namespace otb
#endif
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