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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: itkSquaredDifferenceErrorFunction.txx
Language: C++
Date: $Date$
Version: $Revision$
Copyright (c) Insight Software Consortium. All rights reserved.
See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm 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 __itkSquaredDifferenceErrorFunction_txx
#define __itkSquaredDifferenceErrorFunction_txx
#include "itkSquaredDifferenceErrorFunction.h"
namespace itk
{
namespace Statistics
{
/** Constructor */
template<class TMeasurementVector, class ScalarType>
SquaredDifferenceErrorFunction<TMeasurementVector,ScalarType>
::SquaredDifferenceErrorFunction()
{
}
/** Destructor */
template<class TMeasurementVector, class ScalarType>
SquaredDifferenceErrorFunction <TMeasurementVector,ScalarType>
::~SquaredDifferenceErrorFunction()
{
}
/** Evaluate */
template<class TMeasurementVector, class ScalarType>
ScalarType
SquaredDifferenceErrorFunction <TMeasurementVector,ScalarType>
::Evaluate(const TMeasurementVector& errors) const
{
vnl_vector <ScalarType> temp;
temp.set_size(errors.Size());
for(unsigned int i=0; i<errors.Size(); i++)
temp[i]=errors[i];
//temp.(errors.GetVnlVector());
return (temp.squared_magnitude() / 2);
}
/** Evaluate derivatives */
template<class TMeasurementVector, class ScalarType>
typename SquaredDifferenceErrorFunction <TMeasurementVector,ScalarType>
::InternalVectorType
SquaredDifferenceErrorFunction <TMeasurementVector,ScalarType>
::EvaluateDerivative(const TMeasurementVector& errors) const
{
//TMeasurementVector diff;
InternalVectorType diff;
diff.SetSize(errors.Size());
for(unsigned int i=0; i<errors.Size(); i++)
{
if ((-0.1 < errors[i]) && (errors[i] < 0.1))
{
diff[i]=0;
}
else
{
diff[i]=errors[i];
}
}
return (diff); //(errors);
}
/** Print the object */
template<class TMeasurementVector, class ScalarType>
void
SquaredDifferenceErrorFunction <TMeasurementVector,ScalarType>
::PrintSelf( std::ostream& os, Indent indent ) const
{
os << indent << "SquaredDifferenceErrorFunction(" << this << ")" << std::endl;
Superclass::PrintSelf( os, indent );
}
} // end namespace Statistics
} // end namespace itk
#endif
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