WeibullDistribution.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 WeibullDistribution : public GenericDistribution {
public:
    WeibullDistribution();
 
 
    WeibullDistribution(ScalarType a, ScalarType b, ScalarType valueShift = 0);
 
 
    bool getParameters(ScalarType& a, ScalarType& b) const;
 
 
    bool getOtherParameters(ScalarType& mu, ScalarType& sigma2) const;
 
    double computeMode() const;
    double computeSkewness() const;
 
 
    bool setParameters(ScalarType a, ScalarType b, ScalarType valueShift = 0);
 
 
    void setValueShift(ScalarType vs);
 
    inline ScalarType getValueShift() const { return m_valueShift; }
 
    // 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* cloud,
                           unsigned numberOfClasses,
                           int* histo = nullptr) override;
    const char* getName() const override { return "Weibull"; }
 
protected:
 
    virtual bool setChi2ClassesPositions(unsigned numberOfClasses);
 
 
    std::vector<ScalarType> chi2ClassesPositions;
 
    bool parametersDefined;
    ScalarType m_a;
    ScalarType m_b;
    ScalarType m_valueShift;
 
    ScalarType m_mu;
    ScalarType m_sigma2;
 
 
    static double ComputeG(const ScalarContainer& values,
                           double a,
                           ScalarType valueShift,
                           double valueRange);
    static double FindGRoot(const ScalarContainer& values,
                            ScalarType valueShift,
                            double valueRange);
};
 
}  // namespace cloudViewer