itkExhaustiveOptimizer.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
 *
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 *  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 itkExhaustiveOptimizer_h
#define itkExhaustiveOptimizer_h

#include "itkIntTypes.h"
#include "itkSingleValuedNonLinearOptimizer.h"
#include "ITKOptimizersExport.h"

namespace itk
{
class ITKOptimizers_EXPORT ExhaustiveOptimizer:
  public SingleValuedNonLinearOptimizer
{
public:
  ITK_DISALLOW_COPY_AND_ASSIGN(ExhaustiveOptimizer);

  using Self = ExhaustiveOptimizer;
  using Superclass = SingleValuedNonLinearOptimizer;
  using Pointer = SmartPointer< Self >;
  using ConstPointer = SmartPointer< const Self >;

  using StepsType = Array< SizeValueType >;
  itkNewMacro(Self);

  itkTypeMacro(ExhaustiveOptimizer, SingleValuedNonLinearOptimizer);

  void    StartOptimization() override;

  void StartWalking();

  void ResumeWalking();

  void StopWalking();

  itkSetMacro(StepLength, double);
  itkSetMacro(NumberOfSteps, StepsType);
  itkGetConstReferenceMacro(StepLength, double);
  itkGetConstReferenceMacro(NumberOfSteps, StepsType);
  itkGetConstReferenceMacro(CurrentValue, MeasureType);
  itkGetConstReferenceMacro(MaximumMetricValue, MeasureType);
  itkGetConstReferenceMacro(MinimumMetricValue, MeasureType);
  itkGetConstReferenceMacro(MinimumMetricValuePosition, ParametersType);
  itkGetConstReferenceMacro(MaximumMetricValuePosition, ParametersType);
  itkGetConstReferenceMacro(CurrentIndex, ParametersType);
  itkGetConstReferenceMacro(MaximumNumberOfIterations, SizeValueType);

  const std::string GetStopConditionDescription() const override;

protected:
  ExhaustiveOptimizer();
  ~ExhaustiveOptimizer() override = default;
  void PrintSelf(std::ostream & os, Indent indent) const override;

  void AdvanceOneStep();

  void IncrementIndex(ParametersType & param);

protected:
  MeasureType m_CurrentValue;

  StepsType m_NumberOfSteps;

  SizeValueType m_CurrentIteration;

  bool m_Stop;

  unsigned int m_CurrentParameter;

  double m_StepLength;

  ParametersType m_CurrentIndex;

  SizeValueType m_MaximumNumberOfIterations;

  MeasureType m_MaximumMetricValue;

  MeasureType m_MinimumMetricValue;

  ParametersType m_MinimumMetricValuePosition;

  ParametersType m_MaximumMetricValuePosition;

private:
  std::ostringstream m_StopConditionDescription;
};
} // end namespace itk

#endif