Commit 8c54cfc7 authored by Guillaume Pasero's avatar Guillaume Pasero

ADD: generic affine functor for otbImage

parent bb520643
/*=========================================================================
Program: ORFEO Toolbox
Language: C++
Date: $Date$
Version: $Revision$
Copyright (c) Centre National d'Etudes Spatiales. All rights reserved.
See OTBCopyright.txt for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notices for more information.
=========================================================================*/
#ifndef __otbAffineFunctor_h
#define __otbAffineFunctor_h
namespace otb
{
namespace Functor
{
/** \class AffineFunctor
* \brief This functor performs a linear transform of its input.
*
* \f[ output = a*input + b \f]
*
* Coefficient a is a scalar, its type is templated (default is double).
* Coefficient b has the same type as output type. Standard casting is applied
* between input and output type.
*
* TInput and TOutput type are supposed to be scalar types.
*
* \ingroup OTBImageManipulation
*/
template<class TInput, class TOutput, class TScale=double>
class AffineFunctor
{
public:
/// Constructor
AffineFunctor() {}
/// Constructor
virtual ~AffineFunctor() {}
/// Accessors
void SetA(TScale value)
{
m_A = value;
}
TScale GetA()
{
return m_A;
}
void SetB(TOutput value)
{
m_B = value;
}
TOutput GetB()
{
return m_B;
}
bool operator !=(const AffineFunctor& other) const
{
return ((m_A != other.GetA()) || (m_B != other.GetB()));
}
bool operator==(const AffineFunctor& other) const
{
return ((m_A == other.GetA()) && (m_B == other.GetB()));
}
// main computation method
inline TOutput operator()(const TInput & x) const
{
return (m_B + static_cast<TOutput>(m_A*x));
}
private:
TScale m_A;
TOutput m_B;
};
} // End namespace Functor
} // End namespace otb
#endif
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