otbComplexToIntensityImageFilter.h

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/*
 * Copyright (C) 2005-2024 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 otbComplexToIntensityImageFilter_h
#define otbComplexToIntensityImageFilter_h
 
#include "itkUnaryFunctorImageFilter.h"
#include "vnl/vnl_math.h"
 
namespace otb
{
 
namespace Function
{
 
template <class TInput, class TOutput>
class ComplexToIntensity
{
public:
  ComplexToIntensity()
  {
  }
  ~ComplexToIntensity()
  {
  }
  bool operator!=(const ComplexToIntensity&) const
  {
    return false;
  }
  bool operator==(const ComplexToIntensity& other) const
  {
    return !(*this != other);
  }
  inline TOutput operator()(const TInput& A) const
  {
    return static_cast<TOutput>(A.real() * A.real() + A.imag() * A.imag());
  }
};
}
 
template <class TInputImage, class TOutputImage>
class ITK_EXPORT ComplexToIntensityImageFilter
    : public itk::UnaryFunctorImageFilter<TInputImage, TOutputImage,
                                          Function::ComplexToIntensity<typename TInputImage::PixelType, typename TOutputImage::PixelType>>
{
public:
  using Self         = ComplexToIntensityImageFilter;
  using Superclass   = itk::UnaryFunctorImageFilter<TInputImage, TOutputImage,
                                       Function::ComplexToIntensity<typename TInputImage::PixelType, typename TOutputImage::PixelType>>;
  using Pointer      = itk::SmartPointer<Self>;
  using ConstPointer = itk::SmartPointer<const Self>;
 
  itkNewMacro(Self);
 
  itkTypeMacro(ComplexToIntensityImageFilter, UnaryFunctorImageFilter);
 
  using InputPixelType      = typename TInputImage::PixelType;
  using OutputPixelType     = typename TOutputImage::PixelType;
  using InputPixelValueType = typename itk::NumericTraits<InputPixelType>::ValueType;
 
#ifdef ITK_USE_CONCEPT_CHECKING
  itkConceptMacro(InputConvertibleToOutputCheck, (itk::Concept::Convertible<InputPixelValueType, OutputPixelType>));
 
#endif
 
 
protected:
  ComplexToIntensityImageFilter() = default;
  ~ComplexToIntensityImageFilter() override = default;
 
private:
  ComplexToIntensityImageFilter(const Self&) = delete;
  void operator=(const Self&) = delete;
};
 
} // end namespace otb
 
#endif