otbImaginaryImageToComplexImageFilter.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 otbImaginaryImageToComplexImageFilter_h
#define otbImaginaryImageToComplexImageFilter_h
 
#include "itkUnaryFunctorImageFilter.h"
#include "vnl/vnl_math.h"
 
namespace otb
{
 
namespace Function
{
 
template <class TInputImageImaginaryPart, class TOutput>
class ImaginaryToComplex
{
public:
  typedef typename TOutput::value_type OutputValueType;
 
  ImaginaryToComplex()
  {
  }
  ~ImaginaryToComplex()
  {
  }
  bool operator!=(const ImaginaryToComplex&) const
  {
    return false;
  }
  bool operator==(const ImaginaryToComplex& other) const
  {
    return !(*this != other);
  }
  inline TOutput operator()(const TInputImageImaginaryPart& imaginary) const
  {
    return TOutput(static_cast<OutputValueType>(0.0), static_cast<OutputValueType>(imaginary));
  }
};
}
 
template <class TInputImageImaginaryPart, class TOutputImage>
class ITK_EXPORT ImaginaryImageToComplexImageFilter
    : public itk::UnaryFunctorImageFilter<TInputImageImaginaryPart, TOutputImage,
                                          Function::ImaginaryToComplex<typename TInputImageImaginaryPart::PixelType, typename TOutputImage::PixelType>>
{
public:
  typedef ImaginaryImageToComplexImageFilter Self;
  typedef itk::UnaryFunctorImageFilter<TInputImageImaginaryPart, TOutputImage,
                                       Function::ImaginaryToComplex<typename TInputImageImaginaryPart::PixelType, typename TOutputImage::PixelType>>
                                        Superclass;
  typedef itk::SmartPointer<Self>       Pointer;
  typedef itk::SmartPointer<const Self> ConstPointer;
 
  itkNewMacro(Self);
 
  itkTypeMacro(ImaginaryImageToComplexImageFilter, UnaryFunctorImageFilter);
 
  typedef typename TInputImageImaginaryPart::PixelType            InputImaginaryPartPixelType;
  typedef typename TOutputImage::PixelType                        OutputPixelType;
  typedef typename itk::NumericTraits<OutputPixelType>::ValueType OutputPixelValueType;
 
protected:
  ImaginaryImageToComplexImageFilter()
  {
  }
  ~ImaginaryImageToComplexImageFilter() override
  {
  }
 
private:
  ImaginaryImageToComplexImageFilter(const Self&) = delete;
  void operator=(const Self&) = delete;
};
 
} // end namespace otb
 
#endif