/usr/include/OTB-6.4/otbFourierMellinDescriptorsImageFunction.txx is in libotb-dev 6.4.0+dfsg-1.
This file is owned by root:root, with mode 0o644.
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* Copyright (C) 2005-2017 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_txx
#define otbFourierMellinDescriptorsImageFunction_txx
#include "otbFourierMellinDescriptorsImageFunction.h"
#include "itkConstNeighborhoodIterator.h"
#include "itkNumericTraits.h"
namespace otb
{
/**
* Constructor
*/
template <class TInputImage, class TCoordRep>
FourierMellinDescriptorsImageFunction<TInputImage, TCoordRep>
::FourierMellinDescriptorsImageFunction()
{
m_NeighborhoodRadius = 1;
m_Pmax = 3;
m_Qmax = 3;
m_Sigma = 0.5;
}
template <class TInputImage, class TCoordRep>
void
FourierMellinDescriptorsImageFunction<TInputImage, TCoordRep>
::PrintSelf(std::ostream& os, itk::Indent indent) const
{
this->Superclass::PrintSelf(os, indent);
os << indent << " p indice maximum value : " << m_Pmax << std::endl;
os << indent << " q indice maximum value : " << m_Qmax << std::endl;
os << indent << " Neighborhood radius value : " << m_NeighborhoodRadius << std::endl;
}
template <class TInputImage, class TCoordRep>
typename FourierMellinDescriptorsImageFunction<TInputImage, TCoordRep>::OutputType
FourierMellinDescriptorsImageFunction<TInputImage, TCoordRep>
::EvaluateAtIndex(const IndexType& index) const
{
// Build Fourier-Mellin Harmonics Matrix
ComplexType coefs;
coefs.resize(m_Pmax+1);
OutputType descriptors;
descriptors.resize(m_Pmax+1);
// Initialize moments
for (unsigned int p = 0; p <= m_Pmax; p++)
{
coefs.at(p).resize(m_Qmax+1);
descriptors.at(p).resize(m_Qmax+1);
for (unsigned int q = 0; q <= m_Qmax; q++)
{
coefs.at(p).at(q) = itk::NumericTraits<ScalarComplexType>::Zero;
descriptors.at(p).at(q) = itk::NumericTraits<ScalarRealType>::Zero;
}
}
// Check for input image
if( !this->GetInputImage() )
{
return descriptors;
}
// Check for out of buffer
if ( !this->IsInsideBuffer( index ) )
{
return descriptors;
}
// Create an N-d neighborhood kernel, using a zeroflux boundary condition
typename InputImageType::SizeType kernelSize;
kernelSize.Fill( m_NeighborhoodRadius );
itk::ConstNeighborhoodIterator<InputImageType>
it(kernelSize, this->GetInputImage(), this->GetInputImage()->GetBufferedRegion());
// Set the iterator at the desired location
it.SetLocation(index);
// Walk the neighborhood
const unsigned int size = it.Size();
for (unsigned int i = 0; i < size; ++i)
{
// Retrieve value, and centered-reduced position
ScalarRealType value = static_cast<ScalarRealType>(it.GetPixel(i));
ScalarRealType x = static_cast<ScalarRealType>(it.GetOffset(i)[0])/(2*m_NeighborhoodRadius+1);
ScalarRealType y = static_cast<ScalarRealType>(it.GetOffset(i)[1])/(2*m_NeighborhoodRadius+1);
// Build complex value
ScalarComplexType xplusiy(x, y), x2plusy2(x*x+y*y, 0.0);
// Update cumulants
for (unsigned int p = 0; p <= m_Pmax; p++)
{
for (unsigned int q= 0; q <= m_Qmax; q++)
{
ScalarComplexType power(double(p-2.0+m_Sigma)/2.0, -double(q)/2.0);
if(x!=0 || y !=0) // vcl_pow limitation
{
coefs.at(p).at(q) += vcl_pow(xplusiy, -static_cast<double>(p)) * vcl_pow(x2plusy2, power) * value;
}
}
}
}
// Normalisation
for (int p = m_Pmax; p >= 0; p--)
{
for (int q = m_Qmax; q >= 0; q--)
{
coefs.at(p).at(q) /= 2*CONST_PI * coefs.at(0).at(0);
descriptors.at(p).at(q) = vcl_sqrt((coefs.at(p).at(q).real() * coefs.at(p).at(q).real()
+ coefs.at(p).at(q).imag() * coefs.at(p).at(q).imag()));
}
}
// Return result
return descriptors;
}
} // namespace otb
#endif
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