/usr/include/OTB-6.4/otbSpectralAngleFunctor.h is in libotb-dev 6.4.0+dfsg-1.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 | /*
* 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 otbSpectralAngleFunctor_h
#define otbSpectralAngleFunctor_h
#include "otbMath.h"
#include <algorithm>
namespace otb
{
/** \class SpectralAngleFunctor
* \brief This functor computes the spectral angle according to a reference pixel.
*
* \ingroup OTBImageManipulation
*/
namespace Functor
{
template<class TInput, class TOutputValue>
class SpectralAngleFunctor
{
public:
SpectralAngleFunctor()
{
m_ReferencePixel.SetSize(4);
m_ReferencePixel.Fill(1);
}
virtual ~SpectralAngleFunctor() {}
// Binary operator
inline TOutputValue operator ()(const TInput& inPix) const
{
return this->Evaluate(inPix);
}
void SetReferencePixel(TInput ref)
{
m_ReferencePixel = ref;
m_RefNorm = 0.0;
for (unsigned int i = 0; i < ref.Size(); ++i)
{
m_RefNorm += ref[i] * ref[i];
}
m_RefNorm = vcl_sqrt(static_cast<double>(m_RefNorm));
}
TInput GetReferencePixel() const
{
return m_ReferencePixel;
}
protected:
// This method can be reimplemented in subclasses to actually
// compute the index value
virtual TOutputValue Evaluate(const TInput& inPix) const
{
TOutputValue out;
double dist = 0.0;
double scalarProd = 0.0;
double normProd = 0.0;
double normProd1 = 0.0;
double sqrtNormProd = 0.0;
for (unsigned int i = 0; i < std::min(inPix.Size(), m_ReferencePixel.Size()); ++i)
{
scalarProd += inPix[i] * m_ReferencePixel[i];
normProd1 += inPix[i] * inPix[i];
}
normProd = normProd1 * m_RefNorm * m_RefNorm;
sqrtNormProd = vcl_sqrt(normProd);
if ((sqrtNormProd == 0.0) || (scalarProd / sqrtNormProd > 1))
{
dist = 0.0;
}
else
{
dist = vcl_acos(scalarProd / sqrtNormProd);
}
out = static_cast<TOutputValue>(dist);
return out;
}
TInput m_ReferencePixel;
double m_RefNorm;
};
} // end namespace functor
} // end namespace otb
#endif
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