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/*
* Copyright (C) 2005-2020 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 otbHillShadingFilter_h
#define otbHillShadingFilter_h
#include "otbUnaryFunctorNeighborhoodImageFilter.h"
#include "otbHillShadingFunctor.h"
namespace otb
{
/** \class HillShadingFilter
* \brief Filter to compute the lambertian of a surface given as an image
*
* The light source is assumed to be at a given elevation and azimuth
* (by default \f$ \pi/4 \f$ and \f$ \pi/6 \f$ respectively). This is used
* to generate hill shading representation of relief. The output is
* a value between 0 and 1.
*
* \example BasicFilters/HillShadingExample.cxx
*
* \ingroup OTBImageManipulation
*/
template <class TInputImage, class TOutputImage>
class ITK_EXPORT HillShadingFilter
: public UnaryFunctorNeighborhoodImageFilter<
TInputImage, TOutputImage, Functor::HillShadingFunctor<itk::ConstNeighborhoodIterator<TInputImage>, TInputImage, typename TOutputImage::PixelType>>
{
public:
/** Standard class typedefs. */
typedef HillShadingFilter Self;
typedef itk::SmartPointer<Self> Pointer;
typedef itk::SmartPointer<const Self> ConstPointer;
/** Method for creation through the object factory. */
itkNewMacro(Self);
/** Run-time type information (and related methods). */
itkTypeMacro(HillShadingFilter, UnaryFunctorNeighborhoodImageFilter);
double GetAzimuthLight() const
{
return this->GetFunctor().GetAzimuthLight();
}
void SetAzimuthLight(double az)
{
this->GetFunctor().SetAzimuthLight(az);
}
double GetElevationLight() const
{
return this->GetFunctor().GetElevationLight();
}
void SetElevationLight(double el)
{
this->GetFunctor().SetElevationLight(el);
}
protected:
HillShadingFilter()
{
}
~HillShadingFilter() override
{
}
private:
HillShadingFilter(const Self&) = delete;
void operator=(const Self&) = delete;
};
}
#endif
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