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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 otbFourierMellinDescriptorsImageFunction_h
#define otbFourierMellinDescriptorsImageFunction_h
#include "itkImageFunction.h"
#include "otbImage.h"
#include "otbMath.h"
#include <complex>
namespace otb
{
/**
* \class FourierMellinDescriptorsImageFunction
* \brief Calculate the Fourier-Mellin descriptors in the specified
* neighborhood.
*
* Calculate the Fourier-Mellin descriptors over a specified neighborhood.
* The implemented equation is:
*
* D_{p, q}=|M_{p, q}|
*
* With:
*
* \f[ M_{p, q}=\frac{1}{2\pi} \int_{-\infty}^{\infty} \int_{-\infty}^{\infty} (x+iy)^{p} \cdot
(x^{2}+y^{2})^{\frac{p-2+\sigma-iq}{2}} \cdot f(x, y) \cdot dx \cdot dy \f]
*
* And:
* - \f$(x, y)\f$ pixel localization;
* - \f$ f(x, y)\f$ the pixel value over the \f$(x, y)\f$ coordinate.
*
* This class is templated over the input image type and the
* coordinate representation type (e.g. float or double).
*
* \ingroup ImageFunctions
*
* \ingroup OTBDescriptors
*/
template <class TInputImage, class TCoordRep = double>
class ITK_EXPORT FourierMellinDescriptorsImageFunction
: public itk::ImageFunction<TInputImage, std::vector<std::vector<typename itk::NumericTraits<typename TInputImage::PixelType>::RealType>>, TCoordRep>
{
public:
/** Standard class typedefs. */
typedef FourierMellinDescriptorsImageFunction Self;
typedef itk::ImageFunction<TInputImage, std::vector<std::vector<typename itk::NumericTraits<typename TInputImage::PixelType>::RealType>>, TCoordRep>
Superclass;
typedef itk::SmartPointer<Self> Pointer;
typedef itk::SmartPointer<const Self> ConstPointer;
/** Run-time type information (and related methods). */
itkTypeMacro(FourierMellinDescriptorsImageFunction, ImageFunction);
/** Method for creation through the object factory. */
itkNewMacro(Self);
/** InputImageType typedef support. */
typedef TInputImage InputImageType;
typedef typename Superclass::IndexType IndexType;
typedef typename Superclass::ContinuousIndexType ContinuousIndexType;
typedef typename Superclass::PointType PointType;
typedef typename Superclass::OutputType OutputType;
typedef double ScalarRealType;
typedef typename std::complex<ScalarRealType> ScalarComplexType;
typedef typename std::vector<std::vector<ScalarComplexType>> ComplexType;
typedef TCoordRep CoordRepType;
/** Dimension of the underlying image. */
itkStaticConstMacro(ImageDimension, unsigned int, InputImageType::ImageDimension);
/** Evalulate the function at specified index */
OutputType EvaluateAtIndex(const IndexType& index) const override;
/** Evaluate the function at non-integer positions */
OutputType Evaluate(const PointType& point) const override
{
IndexType index;
this->ConvertPointToNearestIndex(point, index);
return this->EvaluateAtIndex(index);
}
OutputType EvaluateAtContinuousIndex(const ContinuousIndexType& cindex) const override
{
IndexType index;
this->ConvertContinuousIndexToNearestIndex(cindex, index);
return this->EvaluateAtIndex(index);
}
/** Get/Set the radius of the neighborhood over which the
* statistics are evaluated
*/
itkSetMacro(NeighborhoodRadius, unsigned int);
itkGetConstReferenceMacro(NeighborhoodRadius, unsigned int);
itkSetMacro(Pmax, unsigned int);
itkGetConstReferenceMacro(Pmax, unsigned int);
itkSetMacro(Qmax, unsigned int);
itkGetConstReferenceMacro(Qmax, unsigned int);
protected:
FourierMellinDescriptorsImageFunction();
~FourierMellinDescriptorsImageFunction() override
{
}
void PrintSelf(std::ostream& os, itk::Indent indent) const override;
private:
FourierMellinDescriptorsImageFunction(const Self&) = delete;
void operator=(const Self&) = delete;
unsigned int m_Pmax;
unsigned int m_Qmax;
unsigned int m_NeighborhoodRadius;
double m_Sigma;
};
} // namespace otb
#ifndef OTB_MANUAL_INSTANTIATION
#include "otbFourierMellinDescriptorsImageFunction.hxx"
#endif
#endif
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