/usr/include/OTB-6.4/otbEnvelopeSavitzkyGolayInterpolationFunctor.h is in libotb-dev 6.4.0+dfsg-1.
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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 otbEnvelopeSavitzkyGolayInterpolationFunctor_h
#define otbEnvelopeSavitzkyGolayInterpolationFunctor_h
#include "otbSavitzkyGolayInterpolationFunctor.h"
namespace otb
{
namespace Functor
{
/** \class otbEnvelopeSavitzkyGolayInterpolationFunctor
*
* \brief: This class implements a Savitzky-Golay interpolation
* fitting the upper or lower envelope of the series being interpolated.
*
* \sa otbSavitzkyGolayInterpolationFunctor
*
* \ingroup OTBTimeSeries
*/
template <unsigned int Radius, class TSeries, class TDates, class TWeight = TSeries>
class EnvelopeSavitzkyGolayInterpolationFunctor
{
public:
typedef typename TSeries::ValueType ValueType;
typedef typename TDates::ValueType DateType;
typedef typename TWeight::ValueType WeightType;
static const unsigned int Degree = 2;
typedef double CoefficientPrecisionType;
typedef otb::PolynomialTimeSeries< Degree, CoefficientPrecisionType > TSFunctionType;
static const unsigned int nbDates = TSeries::Dimension;
typedef otb::Functor::SavitzkyGolayInterpolationFunctor<Radius, TSeries, TDates, TWeight> SGFunctorType;
/// Constructor
EnvelopeSavitzkyGolayInterpolationFunctor() : m_Iterations(2), m_UpperEnvelope(true), m_DecreaseFactor(0.5)
{
}
/// Destructor
virtual ~EnvelopeSavitzkyGolayInterpolationFunctor() {}
inline void SetWeights(const TWeight weights)
{
for(unsigned int i=0; i<m_WeightSeries.Size(); ++i)
m_WeightSeries[i] = weights[i];
m_SGFunctor.SetWeights( weights );
}
inline void SetDates(const TDates doy)
{
m_SGFunctor.SetDates( doy );
}
inline void SetUpperEnvelope()
{
m_UpperEnvelope = true;
}
inline void SetLowerEnvelope()
{
m_UpperEnvelope = false;
}
inline void SetDecreaseFactor(double df)
{
if(df>0.0 && df <1.0)
m_DecreaseFactor = df;
}
inline void SetIterations(unsigned int its)
{
m_Iterations = its;
}
inline TSeries operator ()(const TSeries& series)
{
TSeries outSeries = m_SGFunctor(series);
for(unsigned int i=0; i<m_Iterations; ++i)
{
for(unsigned int j=0; j<nbDates; ++j)
{
if( m_UpperEnvelope && outSeries[j]<series[j] )
m_WeightSeries[j] = m_WeightSeries[j]*m_DecreaseFactor;
if( !m_UpperEnvelope && outSeries[j]>series[j] )
m_WeightSeries[j] = m_WeightSeries[j]*m_DecreaseFactor;
}
m_SGFunctor.SetWeights(m_WeightSeries);
outSeries = m_SGFunctor(series);
}
return outSeries;
}
private:
TWeight m_WeightSeries;
SGFunctorType m_SGFunctor;
unsigned int m_Iterations;
bool m_UpperEnvelope;
double m_DecreaseFactor;
};
}
} //namespace otb
#endif
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