/usr/include/OTB-6.4/otbPolygonCompacityFunctor.h is in libotb-dev 6.4.0+dfsg-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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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 otbPolygonCompacityFunctor_h
#define otbPolygonCompacityFunctor_h
#include "otbMath.h"
namespace otb
{
/** \class PolygonCompacityFunctor
* \brief Select polygons according to their compacity
*
* This functor compute the compacity of a polygon
* and return true is the distance is above the threshold, false otherwise.
*
* The compacity is defined as:
*
* \f$ 4\pi \frac{A}{L^2}\f$
*
* where \f$ A \f$ is the area (obtained by the method GetArea() )
* and \f$ L \f$ the perimeter (obtained by the method GetLength() ).
*
* \ingroup Functor
*
* \ingroup OTBVectorDataManipulation
*/
template <class TInput1>
class PolygonCompacityFunctor
{
public:
void SetThreshold(double threshold)
{
m_Threshold = threshold;
}
double GetThreshold(void) const
{
return m_Threshold;
}
PolygonCompacityFunctor()
{
m_Threshold = 0.2;
}
~PolygonCompacityFunctor() {}
inline bool operator ()(const TInput1& input)
{
double circularityRatio = 4*CONST_PI*input->GetArea()
/ vnl_math_sqr(input->GetLength());
if (circularityRatio > m_Threshold)
{
return true;
}
else
{
return false;
}
}
private:
double m_Threshold;
};
}
#endif
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