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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 otbAmplitudePhaseToRGBFunctor_h
#define otbAmplitudePhaseToRGBFunctor_h
#include "otbScalarToRainbowRGBPixelFunctor.h"
#include "otbMath.h"
namespace otb
{
namespace Functor
{
/**
* \class AmplitudePhaseToRGBFunctor
* \brief Function object to compute a color representation of a radar image.
*
* This class is useful for visualizing radar images with a combination of
* the phase and the amplitude at the same time.
*
* The amplitude is used to represent the intensity of the pixel and the phase
* to represent it's hue.
*
* Amplitude and phase can be obtained using the itk::ComplexToModulusImageFilter
* and itk::ComplexToPhaseImageFilter for example.
*
*
* \ingroup OTBComplexImage
*/
template<class TInput1, class TInput2 = TInput1, class TInput3 = TInput1, class TOutput = TInput1>
class ITK_EXPORT AmplitudePhaseToRGBFunctor
{
public:
typedef TOutput RGBPixelType;
typedef typename RGBPixelType::ValueType RGBComponentType;
typedef HSVToRGBFunctor<RGBPixelType> HSVToRGBFunctorType;
typedef TInput1 ScalarType;
AmplitudePhaseToRGBFunctor()
{
m_Minimum = 0;
m_Maximum = itk::NumericTraits<ScalarType>::max();
};
~AmplitudePhaseToRGBFunctor(){}
void SetMaximum(ScalarType max)
{
this->m_Maximum = max;
}
void SetMinimum(ScalarType min)
{
this->m_Minimum = min;
}
inline TOutput operator ()(const TInput1& amplitude, const TInput2& coherence, const TInput3& phase) const
{
// std::cout << amplitude << " - " << phase << std::endl;
double hinc;
hinc = 0.6 / (CONST_2PI);
double hue, sat, val;
hue = 0.6 - (phase + CONST_PI) * hinc;
sat = 0.6 * coherence + 0.3;
val = itk::NumericTraits<RGBComponentType>::max() / 2
* ((amplitude - m_Minimum) / (m_Maximum - m_Minimum) + 1.0);
if (amplitude < m_Minimum)
{
val = 0;
}
if (amplitude > m_Maximum)
{
val = itk::NumericTraits<RGBComponentType>::max();
}
return m_HSVToRGBFunctor(hue, sat, val);
}
private:
ScalarType m_Maximum;
ScalarType m_Minimum;
HSVToRGBFunctorType m_HSVToRGBFunctor;
};
}
}
#endif
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