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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 otbRealImageToComplexImageFilter_h
#define otbRealImageToComplexImageFilter_h
#include "itkUnaryFunctorImageFilter.h"
#include "vnl/vnl_math.h"
namespace otb
{
/** \class RealImageToComplexImageFilter
* \brief Computes pixel-wise the complex image of a real image.
*
* \sa RealImageToComplexImageFilter
* \ingroup Multithreaded
*
* \ingroup OTBImageManipulation
*/
namespace Function
{
template <class TInputImageRealPart, class TOutput>
class RealToComplex
{
public:
typedef typename TOutput::value_type OutputValueType;
RealToComplex()
{
}
~RealToComplex()
{
}
bool operator!=(const RealToComplex&) const
{
return false;
}
bool operator==(const RealToComplex& other) const
{
return !(*this != other);
}
inline TOutput operator()(const TInputImageRealPart& real) const
{
return TOutput(static_cast<OutputValueType>(real), static_cast<OutputValueType>(0.0));
}
};
}
template <class TInputImageRealPart, class TOutputImage>
class ITK_EXPORT RealImageToComplexImageFilter
: public itk::UnaryFunctorImageFilter<TInputImageRealPart, TOutputImage,
Function::RealToComplex<typename TInputImageRealPart::PixelType, typename TOutputImage::PixelType>>
{
public:
/** Standard class typedefs. */
typedef RealImageToComplexImageFilter Self;
typedef itk::UnaryFunctorImageFilter<TInputImageRealPart, TOutputImage,
Function::RealToComplex<typename TInputImageRealPart::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);
/** Runtime information support. */
itkTypeMacro(RealImageToComplexImageFilter, UnaryFunctorImageFilter);
typedef typename TInputImageRealPart::PixelType InputRealPartPixelType;
typedef typename TOutputImage::PixelType OutputPixelType;
typedef typename itk::NumericTraits<OutputPixelType>::ValueType OutputPixelValueType;
protected:
RealImageToComplexImageFilter()
{
}
~RealImageToComplexImageFilter() override
{
}
private:
RealImageToComplexImageFilter(const Self&) = delete;
void operator=(const Self&) = delete;
};
} // end namespace otb
#endif
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