itkOptimizerParameterScalesEstimator.h

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/*=========================================================================
 *
 *  Copyright Insight Software Consortium
 *
 *  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.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.
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 *=========================================================================*/
#ifndef itkOptimizerParameterScalesEstimator_h
#define itkOptimizerParameterScalesEstimator_h

#include "itkObject.h"
#include "itkObjectFactory.h"
#include "itkOptimizerParameters.h"

namespace itk
{

template< typename TInternalComputationValueType=double >
class OptimizerParameterScalesEstimatorTemplate : public Object
{
public:
  ITK_DISALLOW_COPY_AND_ASSIGN(OptimizerParameterScalesEstimatorTemplate);

  using Self = OptimizerParameterScalesEstimatorTemplate;
  using Superclass = Object;
  using Pointer = SmartPointer<Self>;
  using ConstPointer = SmartPointer<const Self>;

  itkTypeMacro( OptimizerParameterScalesEstimatorTemplate, Object );

  using ScalesType = OptimizerParameters<TInternalComputationValueType>;

  using ParametersType = OptimizerParameters<TInternalComputationValueType>;

  using FloatType = TInternalComputationValueType;

  virtual void EstimateScales(ScalesType &scales) = 0;

  virtual FloatType EstimateStepScale(const ParametersType &step) = 0;

  virtual void EstimateLocalStepScales(const ParametersType &step,
    ScalesType &localStepScales) = 0;

  virtual FloatType EstimateMaximumStepSize() = 0;

protected:
  OptimizerParameterScalesEstimatorTemplate()= default;
  ~OptimizerParameterScalesEstimatorTemplate() override = default;

  void PrintSelf(std::ostream &os, Indent indent) const override
    {
    Superclass::PrintSelf(os,indent);
    }
}; //class OptimizerParameterScalesEstimatorTemplate

using OptimizerParameterScalesEstimator = OptimizerParameterScalesEstimatorTemplate<double>;

}  // namespace itk

#endif