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/*=========================================================================
*
* Copyright NumFOCUS
*
* 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
*
* https://www.apache.org/licenses/LICENSE-2.0.txt
*
* 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 itkScaleLogarithmicTransform_hxx
#define itkScaleLogarithmicTransform_hxx
namespace itk
{
// Set the parameters
template <typename TParametersValueType, unsigned int VDimension>
void
ScaleLogarithmicTransform<TParametersValueType, VDimension>::SetParameters(const ParametersType & parameters)
{
ScaleType scales;
for (unsigned int i = 0; i < SpaceDimension; ++i)
{
scales[i] = std::exp(parameters[i]);
}
// Save parameters. Needed for proper operation of TransformUpdateParameters.
if (¶meters != &(this->m_Parameters))
{
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 <typename TParametersValueType, unsigned int VDimension>
auto
ScaleLogarithmicTransform<TParametersValueType, VDimension>::GetParameters() const -> const ParametersType &
{
itkDebugMacro("Getting parameters ");
const ScaleType & scales = this->GetScale();
// Transfer the translation part
for (unsigned int i = 0; i < SpaceDimension; ++i)
{
this->m_Parameters[i] = std::log(scales[i]);
}
itkDebugMacro("After getting parameters " << this->m_Parameters);
return this->m_Parameters;
}
// Print self
template <typename TParametersValueType, unsigned int VDimension>
void
ScaleLogarithmicTransform<TParametersValueType, VDimension>::PrintSelf(std::ostream & os, Indent indent) const
{
Superclass::PrintSelf(os, indent);
}
template <typename TParametersValueType, unsigned int VDimension>
void
ScaleLogarithmicTransform<TParametersValueType, VDimension>::ComputeJacobianWithRespectToParameters(
const InputPointType & p,
JacobianType & jacobian) const
{
const ScaleType & scales = this->GetScale();
jacobian.SetSize(SpaceDimension, this->GetNumberOfLocalParameters());
jacobian.Fill(0);
for (unsigned int dim = 0; dim < SpaceDimension; ++dim)
{
// the derivative with respect to Log(scale) = scale * derivative with
// respect to scale.
jacobian(dim, dim) = scales[dim] * p[dim];
}
}
} // namespace itk
#endif
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