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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.
*
*=========================================================================*/
#ifndef itkConjugateGradientOptimizer_h
#define itkConjugateGradientOptimizer_h
#include "itkIntTypes.h"
#include "itkSingleValuedNonLinearVnlOptimizer.h"
#include "vnl/algo/vnl_conjugate_gradient.h"
#include "ITKOptimizersExport.h"
namespace itk
{
/** \class ConjugateGradientOptimizer
* \brief Wrap of the vnl_conjugate_gradient
*
* \ingroup Numerics Optimizers
* \ingroup ITKOptimizers
*/
class ITKOptimizers_EXPORT ConjugateGradientOptimizer:
public SingleValuedNonLinearVnlOptimizer
{
public:
/** Standard class typedefs. */
typedef ConjugateGradientOptimizer Self;
typedef SingleValuedNonLinearVnlOptimizer Superclass;
typedef SmartPointer< Self > Pointer;
typedef SmartPointer< const Self > ConstPointer;
/** Method for creation through the object factory. */
itkNewMacro(Self);
/** Run-time type information (and related methods). */
itkTypeMacro(ConjugateGradientOptimizer, SingleValuedNonLinearOptimizer);
/** InternalParameters typedef. */
typedef vnl_vector< double > InternalParametersType;
/** Internal Optimizer Type */
typedef vnl_conjugate_gradient InternalOptimizerType;
/** Method for getting access to the internal optimizer */
vnl_conjugate_gradient * GetOptimizer();
/** Start optimization with an initial value. */
virtual void StartOptimization(void) ITK_OVERRIDE;
/** Plug in a Cost Function into the optimizer */
virtual void SetCostFunction(SingleValuedCostFunction *costFunction) ITK_OVERRIDE;
/** Return the number of iterations performed so far */
SizeValueType GetNumberOfIterations() const;
SizeValueType GetCurrentIteration() const;
/** Return Current Value */
MeasureType GetValue() const;
protected:
ConjugateGradientOptimizer();
virtual ~ConjugateGradientOptimizer() ITK_OVERRIDE;
typedef Superclass::CostFunctionAdaptorType CostFunctionAdaptorType;
private:
ITK_DISALLOW_COPY_AND_ASSIGN(ConjugateGradientOptimizer);
/** The vnl optimization method for conjugate gradient. */
bool m_OptimizerInitialized;
InternalOptimizerType *m_VnlOptimizer;
};
} // end namespace itk
#endif
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