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/*
* Copyright (C) 2005-2017 Centre National d'Etudes Spatiales (CNES)
* Copyright (C) 2007-2012 Institut Mines Telecom / Telecom Bretagne
*
* This file is part of Orfeo Toolbox
*
* https://www.orfeo-toolbox.org/
*
* 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
*
* 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 otbGaussianModelComponent_h
#define otbGaussianModelComponent_h
#include "itkCovarianceSampleFilter.h"
#include "itkGaussianMembershipFunction.h"
#include "otbModelComponentBase.h"
namespace otb
{
namespace Statistics
{
/** \class GaussianModelComponent
* \brief is a component (derived from ModelComponentBase) for
* Gaussian class. This class is used in SEMClassifier
*
* <b>Recent API changes:</b>
* N/A
*
* \sa ModelComponentBase, SEMClassifier
*
* \ingroup OTBLearningBase
*/
template<class TSample>
class ITK_EXPORT GaussianModelComponent :
public ModelComponentBase<TSample>
{
public:
/**Standard class typedefs. */
typedef GaussianModelComponent Self;
typedef ModelComponentBase<TSample> Superclass;
typedef itk::SmartPointer<Self> Pointer;
typedef itk::SmartPointer<const Self> ConstPointer;
/**Standard Macros */
itkNewMacro(Self);
itkTypeMacro(GaussianModelComponent, ModelComponentBase);
/** Typedefs from the superclass */
typedef typename Superclass::MeasurementVectorType MeasurementVectorType;
typedef typename Superclass::MeasurementVectorSizeType
MeasurementVectorSizeType;
typedef typename Superclass::MembershipFunctionType MembershipFunctionType;
typedef typename Superclass::ParametersType ParametersType;
/** Type of the membership function. Gaussian density function */
typedef itk::Statistics::GaussianMembershipFunction<MeasurementVectorType>
NativeMembershipFunctionType;
typedef typename NativeMembershipFunctionType::MeanVectorType MeanVectorType;
/** Types of the mean and the covariance calculator that will update
* this component's distribution parameters */
typedef itk::Statistics::CovarianceSampleFilter<TSample> CovarianceEstimatorType;
/** types of the covariance to be used by the
* NativeMembershipFunctionType */
typedef typename CovarianceEstimatorType::MatrixType CovarianceType;
/** Sets the input sample */
void SetSample(const TSample* sample) override;
/** Sets the component's distribution parameters.
* e.g. Then user can call directly Pdf( MeasurementVectorType & ) */
void SetParameters(const ParametersType& parameters);
/** Show the parameters in a minimal form in comparison to PrintSelf */
void ShowParameters(std::ostream& os, itk::Indent indent) const override;
protected:
GaussianModelComponent();
~GaussianModelComponent() override {}
void PrintSelf(std::ostream& os, itk::Indent indent) const override;
void GenerateData() override;
private:
GaussianModelComponent(const Self &); //purposely not implemented
void operator =(const Self&); //purposely not implemented
typename NativeMembershipFunctionType::Pointer m_GaussianMembershipFunction;
// TODO add a m_GaussianCumulativeFunction
typename CovarianceEstimatorType::Pointer m_CovarianceEstimator;
MeanVectorType m_Mean;
CovarianceType m_Covariance;
}; // end of class
} // end of namespace Statistics
} // end of namespace otb
#ifndef OTB_MANUAL_INSTANTIATION
#include "otbGaussianModelComponent.txx"
#endif
#endif
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