/usr/include/OTB-6.4/otbScalarToRainbowRGBPixelFunctor.h 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 otbScalarToRainbowRGBPixelFunctor_h
#define otbScalarToRainbowRGBPixelFunctor_h
#include "itkColormapFunction.h"
namespace otb
{
namespace Functor
{
/**
* \class HSVToRGBFunctor
* \brief Function object to convert HSV value to RGB.
*
*
* \sa ScalarToRainbowRGBPixelFunctor
*
*
* \ingroup OTBColorMap
*/
template<class TRGBPixel>
class ITK_EXPORT HSVToRGBFunctor
{
public:
HSVToRGBFunctor(){};
~HSVToRGBFunctor(){}
inline TRGBPixel operator ()(double h, double s, double v) const
{
const double onethird = 1.0 / 3.0;
const double onesixth = 1.0 / 6.0;
const double twothird = 2.0 / 3.0;
const double fivesixth = 5.0 / 6.0;
double r, g, b;
// compute RGB from HSV
if (h > onesixth && h <= onethird) // green/red
{
g = 1.0;
r = (onethird - h) / onesixth;
b = 0.0;
}
else if (h > onethird && h <= 0.5) // green/blue
{
g = 1.0;
b = (h - onethird) / onesixth;
r = 0.0;
}
else if (h > 0.5 && h <= twothird) // blue/green
{
b = 1.0;
g = (twothird - h) / onesixth;
r = 0.0;
}
else if (h > twothird && h <= fivesixth) // blue/red
{
b = 1.0;
r = (h - twothird) / onesixth;
g = 0.0;
}
else if (h > fivesixth && h <= 1.0) // red/blue
{
r = 1.0;
b = (1.0 - h) / onesixth;
g = 0.0;
}
else // red/green
{
r = 1.0;
g = h / onesixth;
b = 0.0;
}
// add Saturation to the equation.
r = (s * r + (1.0 - s));
g = (s * g + (1.0 - s));
b = (s * b + (1.0 - s));
r *= v;
g *= v;
b *= v;
// std::cout << h << ", " << s << ", " << v << " -> " << r << ", " << g << ", " << b << std::endl;
TRGBPixel ans;
typedef typename TRGBPixel::ComponentType RGBComponentType;
ans[0] = static_cast<RGBComponentType>(r);
ans[1] = static_cast<RGBComponentType>(g);
ans[2] = static_cast<RGBComponentType>(b);
return ans;
}
};
}
namespace Functor
{
/**
* \class ScalarToRainbowRGBPixelFunctor
* \brief Function object which maps a scalar value into a rainbow RGB pixel value.
*
* Grayscale image is mapped to a color image where blue represents
* small values and red represents big values.
*
* This function is compatible with the colormap hierarchy presented in
* http://hdl.handle.net/1926/1452
*
* \example BasicFilters/DEMToRainbowExample.cxx
*
*
* \ingroup OTBColorMap
*/
template<class TScalar, class TRGBPixel = itk::RGBPixel<unsigned char> >
class ITK_EXPORT ScalarToRainbowRGBPixelFunctor
: public itk::Function::ColormapFunction<TScalar, TRGBPixel>
// public itk::Functor::ScalarToRGBPixelFunctor<TScalar>
{
public:
ScalarToRainbowRGBPixelFunctor();
~ScalarToRainbowRGBPixelFunctor() ITK_OVERRIDE {}
typedef ScalarToRainbowRGBPixelFunctor Self;
typedef itk::Function::ColormapFunction<TScalar, TRGBPixel> Superclass;
typedef itk::SmartPointer<Self> Pointer;
typedef itk::SmartPointer<const Self> ConstPointer;
/** Method for creation through the object factory. */
itkNewMacro(Self);
typedef TRGBPixel RGBPixelType;
typedef typename RGBPixelType::ComponentType RGBComponentType;
typedef TScalar ScalarType;
typedef HSVToRGBFunctor<RGBPixelType> HSVToRGBFunctorType;
RGBPixelType operator ()(const TScalar&) const ITK_OVERRIDE;
protected:
RGBPixelType HSVToRGB(double h, double s, double v) const;
private:
ScalarToRainbowRGBPixelFunctor(const Self &); //purposely not implemented
void operator =(const Self&); //purposely not implemented
HSVToRGBFunctorType m_HSVToRGBFunctor;
};
} // end namespace functor
} // end namespace itk
#ifndef OTB_MANUAL_INSTANTIATION
#include "otbScalarToRainbowRGBPixelFunctor.txx"
#endif
#endif
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