PDFGaussian.h

// Gaussian-based Probability Density function class
// Written by Sergey Kosov in 2015 for Project X
#pragma once

#include "IPDF.h"

namespace DirectGraphicalModels 
{
    // ================================ Histogram PDF Class ==============================
    class CPDFGaussian : public IPDF
    {
    public:
        DllExport CPDFGaussian(void) : IPDF(), m_mu(0), m_sigma2(0) {}
        DllExport virtual ~CPDFGaussian(void) {}

        DllExport virtual void  reset(void);

        DllExport virtual void      addPoint(Scalar point);
        DllExport virtual double    getDensity(Scalar point); 
        DllExport virtual Scalar    min(void) const { return Scalar(m_mu - 3 * sqrt(m_sigma2)); }
        DllExport virtual Scalar    max(void) const { return Scalar(m_mu + 3 * sqrt(m_sigma2)); }


    protected:
        DllExport virtual void      saveFile(FILE *pFile) const;
        DllExport virtual void      loadFile(FILE *pFile);

    
    private:
        double  m_mu;
        double  m_sigma2;       // sigma^2
    };
}