SegmentStatisticsProber.h

/*
 
MIT License
 
Copyright (c) 2017 FMI Open Development / Markus Peura, first.last@fmi.fi
 
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
 
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
 
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
 
*/
/*
Part of Rack development has been done in the BALTRAD projects part-financed
by the European Union (European Regional Development Fund and European
Neighbourhood Partnership Instrument, Baltic Sea Region Programme 2007-2013)
*/
#ifndef STATISTICS_PROBER_H
#define STATISTICS_PROBER_H
 
#include <ostream>
#include <cmath>
//#include "ImageOp.h"
//#include "Coordinates.h"
//#include "FilePng.h"
#include "SegmentProber.h"
 
namespace drain
{
namespace image
{
 
 
class SegmentStatistics {
 
public:
 
    SegmentStatistics(){
        clear();
    };
 
    ~SegmentStatistics(){};
 
    virtual inline
    void clear(){
        size = 0;
        sumX = 0;
        sumY = 0;
        sumXX = 0;
        sumYY = 0;
        sumXY = 0;
        _updateNeeded = true;
    };
 
    virtual inline
    void add(const int &i, const int &j){
        ++size;
        sumX  += i;
        sumY  += j;
        sumXX += i*i;
        sumYY += j*j;
        sumXY += i*j;
    }
 
 
    inline
    double getSize() const {
        return static_cast<double>(size);
    };
 
 
    inline
    double getMeanX() const {
        updateStats();
        return cx;
    };
 
 
    inline
    double getMeanY() const {
        updateStats();
        return cy; ;
    };
 
 
    inline
    double getHorizontality()  const {
        updateStats();
        return cxx / (cxx + cyy);
        //return sqrt(cxx) / sqrt(cxx + cyy);
    };
 
    inline
    double getVerticality() const {
        updateStats();
        return cyy / (cxx + cyy);
        //return sqrt(cyy) / sqrt(cxx + cyy);
    };
 
 
 
    inline
    double getVariance() const {
        updateStats();
        return cxx + cyy;
        //return getVarianceHorz() + getVarianceVert();
    };
 
    inline
    double getVarianceHorz() const {
        updateStats();
        return cxx;
    };
 
    inline
    double getVarianceVert() const {
        updateStats();
        return cyy;
    };
 
 
    inline
    double getSlimness() const {
        return 2.0*M_PI*getVariance()/sizeD - 1.0;
    };
 
 
    /*
    inline
    double getAnnularity() const {
        updateStats();
        return getSlimness() * 2.0 * eigenValue2 / (eigenValue1 + eigenValue2);
    };
    */
 
 
 
    inline
    double getElongation()  const {
        updateStats();
        return (eigenValue1 - eigenValue2) / (eigenValue1 + eigenValue2);
        //return (eigenValue1 - eigenValue2) / eigenValue1;
    };
 
    inline
    double getEigenValue1() const {
        updateStats();
        return eigenValue1;
    };
 
 
    inline
    double getEigenValue2() const {
        updateStats();
        return eigenValue2;
    };
 
    inline
    void toOstr(std::ostream & ostr) const {
        ostr << '('   << getMeanX() << ',' << getMeanY() << ')' << ' ';
        ostr << "s="   << getSize() << ',';
        ostr << "h="   << getHorizontality() << ',';
        ostr << "v="   << getVerticality() << ',';
        ostr << "S="   << getVariance() << ',';
        ostr << "C="   << '[' << cxx << ',' << cxy << ';' << cxy << ',' << cyy << ']' << ',';
        ostr << "e12=" << getEigenValue1() << ',' << getEigenValue2() << ',';
        //ostr << "TEMP=" << sqrt(cxxMcyy*cxxMcyy + 4.0*cxy2);
        ostr << "e="   << getElongation() << ',';
        ostr << "l="   << getSlimness() << ',';
    }
 
protected:
 
 
    inline
    void updateStats() const {
 
        if (!_updateNeeded)
            return;
 
        sizeD = static_cast<double>(size);
 
        cx = static_cast<double>(sumX)/sizeD;
        cy = static_cast<double>(sumY)/sizeD;
 
        if (size == 1){
            cxx = 1.0;
            cyy = 1.0;
            cxy = 0.0;
        }
        else {
            cxx = static_cast<double>(sumXX)/sizeD - cx*cx;
            cxy = static_cast<double>(sumXY)/sizeD - cx*cy;
            cyy = static_cast<double>(sumYY)/sizeD - cy*cy;
        }
 
 
        const double epsilon = 0.00001;
        if ((cxy > -epsilon) && (cxy < epsilon)){
            if (cxx > cyy){ // ensure  eigenValue1 > eigenValue2
                eigenValue1 = cxx;
                eigenVector1x = 1.0;
                eigenVector1y = 0.0;
                eigenValue2 = cyy;
                eigenVector2x = 0.0;
                eigenVector2y = 1.0;
            }
            else {
                eigenValue1 = cyy;
                eigenVector1x = 0.0;
                eigenVector1y = 1.0;
                eigenValue2 = cxx;
                eigenVector2x = 1.0;
                eigenVector2y = 0.0;
            }
        }
        else {
 
            /*
             *
             *
             */
 
            double cxy2 = cxy*cxy;
            double cxxPcyy = cxx+cyy;
            double cxxMcyy = cxx-cyy;
            double temp,scale;
 
            temp = sqrt(cxxMcyy*cxxMcyy + 4.0*cxy2);
            eigenValue1 = (cxxPcyy + temp)/2.0;
            eigenValue2 = (cxxPcyy - temp)/2.0;
            // std::cerr << '('   << cx << ',' << cy << ')' << ' ';
            // std::cerr << "E12,t=" << eigenValue1 << ',' << eigenValue2 << ',' << temp << '\n';
 
            temp = cxx-eigenValue1;
            scale = sqrt(cxy2 + temp*temp);
            eigenVector1x = temp/scale;
            eigenVector1y = cxy/scale;
 
            temp = cxx-eigenValue2;
            scale = sqrt(cxy2 + temp*temp);
            eigenVector2x = temp/scale;
            eigenVector2y = cxy/scale;
        }
 
        //elongation = eigenValue2 / eigenValue1;
        _updateNeeded = false;
    }
 
    mutable bool _updateNeeded;
 
    long int size;
 
    long sumX, sumY;
 
    long  sumXX, sumYY, sumXY;
 
    mutable double sizeD;
 
    mutable double cx;
 
    mutable double cy;
 
    mutable double cxx, cyy, cxy;
 
    mutable double eigenValue1;
    mutable double eigenVector1x;
    mutable double eigenVector1y;
    mutable double eigenValue2;
    mutable double eigenVector2x;
    mutable double eigenVector2y;
    mutable double elongation;
};
 
 
 
inline
std::ostream & operator<<(std::ostream & ostr, const SegmentStatistics & s){
    s.toOstr(ostr);
    return ostr;
}
 
 
 
template <class T, class D>
class SegmentStatisticsProber : public SegmentProber<T,D,SegmentProberConf<T,D> > {
 
public:
 
    typedef T src_t;
    typedef D dst_t;
    //typedef SegmentProberConf<T,D> conf_t;
 
    SegmentStatisticsProber(const Channel &s, Channel & d, const std::string statistics="s") : SegmentProber<T,D,SegmentProberConf<T,D> >(s,d), stats(statistics) {
    };
 
    virtual
    ~SegmentStatisticsProber(){};
 
    const std::string & stats;
 
    SegmentStatistics statistics;
 
    virtual inline
    bool isValidSegment(int i, int j) const {
        // this->src;
        // this->conf;
        // this->src.template get<src_t>(i,j);
        // return this->conf.isValidIntensity(12345);
        return this->conf.isValidIntensity(this->src.template get<src_t>(i,j));
    }
 
protected:
 
    virtual
    inline
    void clear(){
        statistics.clear();
    };
 
 
    virtual
    inline
    void update(int i, int j){
        this->statistics.add(i,j);
    }
 
 
};
 
 
template <class T, class D>
std::ostream & operator<<(std::ostream & ostr, const SegmentStatisticsProber<T,D> & prober){
    ostr << (const SegmentProber<T,D,SegmentProberConf<T,D> > &)prober << '\t';
    ostr << prober.statistics;
    return ostr;
}
 
 
 
}
}
#endif /* SEGMENSTATS_H_ */
 
 
// Drain