otbAssociativeSymmetricalSumImageFilter.h

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/*
 * Copyright (C) 2005-2022 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
{
 
namespace Functor
{
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:
  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;
 
  itkNewMacro(Self);
 
protected:
  AssociativeSymmetricalSumImageFilter()
  {
  }
  ~AssociativeSymmetricalSumImageFilter() override
  {
  }
 
private:
  AssociativeSymmetricalSumImageFilter(const Self&) = delete;
  void operator=(const Self&) = delete;
};
 
} // end namespace otb
 
#endif