NormalDistribution.h

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// ----------------------------------------------------------------------------
// -                        CloudViewer: www.cloudViewer.org                  -
// ----------------------------------------------------------------------------
// Copyright (c) 2018-2024 www.cloudViewer.org
// SPDX-License-Identifier: MIT
// ----------------------------------------------------------------------------
 
#pragma once
 
// Local
#include "GenericDistribution.h"
 
namespace cloudViewer {
 
 
class CV_CORE_LIB_API NormalDistribution : public GenericDistribution {
public:
    NormalDistribution();
 
 
    NormalDistribution(ScalarType _mu, ScalarType _sigma2);
 
    // inherited methods (see GenericDistribution)
    bool computeParameters(const ScalarContainer& values) override;
    double computeP(ScalarType x) const override;
    double computePfromZero(ScalarType x) const override;
    double computeP(ScalarType x1, ScalarType x2) const override;
    double computeChi2Dist(const GenericCloud* Yk,
                           unsigned numberOfClasses,
                           int* histo = nullptr) override;
    const char* getName() const override { return "Gauss"; }
 
 
    bool getParameters(ScalarType& _mu, ScalarType& _sigma2) const;
 
 
    bool setParameters(ScalarType _mu, ScalarType _sigma2);
 
    inline ScalarType getMu() const { return m_mu; }
 
    inline ScalarType getSigma2() const { return m_sigma2; }
 
    bool computeParameters(const GenericCloud* cloud);
 
 
    bool computeRobustParameters(const ScalarContainer& values, double nSigma);
 
protected:
 
    virtual bool setChi2ClassesPositions(unsigned numberOfClasses);
 
    ScalarType m_mu;
    ScalarType m_sigma2;
    double m_qFactor;
    double m_normFactor;
 
 
    std::vector<ScalarType> m_chi2ClassesPositions;
 
    std::vector<ScalarType> m_Pi;
};
 
}  // namespace cloudViewer