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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkScaleLogarithmicTransform.txx,v $
Language: C++
Date: $Date: 2006-03-19 04:36:59 $
Version: $Revision: 1.5 $
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 _itkScaleLogarithmicTransform_txx
#define _itkScaleLogarithmicTransform_txx
#include "itkScaleLogarithmicTransform.h"
namespace itk
{
// Constructor with default arguments
template<class ScalarType, unsigned int NDimensions>
ScaleLogarithmicTransform<ScalarType, NDimensions>::
ScaleLogarithmicTransform()
{
return;
}
// Destructor
template<class ScalarType, unsigned int NDimensions>
ScaleLogarithmicTransform<ScalarType, NDimensions>::
~ScaleLogarithmicTransform()
{
return;
}
// Set the parameters
template <class ScalarType, unsigned int NDimensions>
void
ScaleLogarithmicTransform<ScalarType, NDimensions>
::SetParameters( const ParametersType & parameters )
{
ScaleType scales;
for( unsigned int i=0; i<SpaceDimension; i++ )
{
scales[i] = vcl_exp(parameters[i] );
}
this->m_Parameters = parameters;
this->SetScale( scales );
// Modified is always called since we just have a pointer to the
// parameters and cannot know if the parameters have changed.
this->Modified();
}
// Get Parameters
template <class TScalarType,unsigned int NDimensions>
const typename ScaleLogarithmicTransform<TScalarType,NDimensions>::ParametersType &
ScaleLogarithmicTransform<TScalarType,NDimensions>
::GetParameters( void ) const
{
itkDebugMacro( << "Getting parameters ");
const ScaleType & scales = this->GetScale();
// Transfer the translation part
for(unsigned int i=0; i < SpaceDimension; i++)
{
this->m_Parameters[i] = vcl_log(scales[i] );
}
itkDebugMacro(<<"After getting parameters " << this->m_Parameters );
return this->m_Parameters;
}
// Print self
template<class ScalarType, unsigned int NDimensions>
void
ScaleLogarithmicTransform<ScalarType, NDimensions>::
PrintSelf(std::ostream &os, Indent indent) const
{
Superclass::PrintSelf(os, indent);
}
// Compute the Jacobian of the transformation
// It follows the same order of Parameters vector
template<class ScalarType, unsigned int NDimensions>
const typename ScaleLogarithmicTransform<ScalarType, NDimensions>::JacobianType &
ScaleLogarithmicTransform<ScalarType, NDimensions>
::GetJacobian( const InputPointType & p ) const
{
const ScaleType & scales = this->GetScale();
this->m_Jacobian.Fill(0);
for(unsigned int dim=0; dim<SpaceDimension; dim++)
{
// the derivative with respect to Log(scale) = scale * derivative with respect to scale.
this->m_Jacobian(dim,dim) = scales[dim] * p[dim];
}
return this->m_Jacobian;
}
} // namespace
#endif
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