RadarWindows.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 RACK_RADAR_WINDOWS_H
#define RACK_RADAR_WINDOWS_H
 
#include <math.h>
 
#include <drain/Log.h>
#include <drain/TypeUtils.h>
#include <drain/image/Window.h>
#include <drain/image/SlidingWindow.h>
//#include <drain/image/SequentialImageOp.h>
 
#include "data/PolarODIM.h"
 
using namespace drain::image;
 
// file RadarFunctorOp?
 
namespace rack {
 
 
 
class RadarWindowGeom : public drain::UniTuple<double,2> {
 
public:
 
    RadarWindowGeom() : widthM(this->next()), heightD(this->next()) {
    }
 
    RadarWindowGeom(const RadarWindowGeom & geom) : widthM(next()), heightD(next()) {
        assignSequence(geom.tuple());
    }
 
    // Beam-directional window width in metres
    double & widthM; // = 1500.0;
 
    // Azimuthal window height in degrees
    double & heightD; // = 3.0;
 
};
 
class RadarWindowConfig : public RadarWindowGeom, public drain::image::WindowConfig {
 
public:
 
    double contributionThreshold = 0.5;  //
 
    bool invertPolar = false;
 
    bool relativeScale = false;  //
 
    RadarWindowConfig(int widthM=1500, double heightD=3.0, double contributionThreshold = 0.5, bool invertPolar=false, bool relativeScale=false) :
        drain::image::WindowConfig(1, 1), // drain::image::WindowConfig(width, height),
        // widthM(widthM), heightD(heightD),
        contributionThreshold(contributionThreshold), invertPolar(invertPolar), relativeScale(relativeScale) {
        this->widthM = widthM;
        this->heightD = heightD;
    }
 
    RadarWindowConfig(const RadarWindowConfig & conf) :
        RadarWindowGeom(conf),
        drain::image::WindowConfig(conf),
        //widthM(conf.widthM),
        //heightD(conf.heightD),
        contributionThreshold(conf.contributionThreshold),
        invertPolar(conf.invertPolar),
        relativeScale(conf.relativeScale){
 
    }
 
    //RadarWindowConfig(drain::UnaryFunctor & ftor, int width=3, int height=3, double contributionThreshold = 0.5) :
    template <class FT>
    RadarWindowConfig(const FT & ftor, int widthM=1500, double heightD=3.0,
            double contributionThreshold = 0.5, bool invertPolar=false, bool relativeScale=false) :
        drain::image::WindowConfig(0, 0, ftor),         //drain::image::WindowConfig(ftor, width, height),
        //widthM(widthM), heightD(heightD),
        contributionThreshold(contributionThreshold), invertPolar(invertPolar), relativeScale(relativeScale) {
        // invertPolar(false), contributionThreshold(contributionThreshold) {
        this->widthM = widthM;
        this->heightD = heightD;
    }
 
    // Perhaphs deprecating.
    void setPixelConf(RadarWindowConfig & conf, const PolarODIM & inputODIM) const;
 
    // NEW, "Inverted" setPixelConf
    void adjustMyConf(const RadarWindowConfig & conf, const PolarODIM & inputODIM);
 
 
    void updatePixelSize(const PolarODIM & inputODIM);
 
};
 
 
 
class RadarWindowCore : public drain::image::WeightedWindowCore {
 
 
public:
 
 
    RadarWindowCore() : NI(0.0) {
    }
 
    PolarODIM odimSrc;
 
    mutable double NI;
 
};
 
 
 
template <class C, class R=RadarWindowCore>
class SlidingRadarWindowBase : public drain::image::SlidingWindow<C, R> {
public:
 
    SlidingRadarWindowBase(int width=0, int height=0) : drain::image::SlidingWindow<C,R>(width,height), rangeNorm(1), rangeNormEnd(2), countMin(0) {
        this->resetAtEdges = true;
    };
 
    SlidingRadarWindowBase(const C & conf) : drain::image::SlidingWindow<C,R>(conf), rangeNorm(1), rangeNormEnd(2), countMin(0) {
        this->resetAtEdges = conf.invertPolar;
        //this->resetAtEdges = true; //conf.invertPolar;
    };
 
    virtual
    ~SlidingRadarWindowBase(){};
 
    //  Redefines Window<C,R>::setSrcFrame(ImageFrame)
    void setSrcFrame(const drain::image::ImageFrame & src){
 
        drain::Logger mout("SlidingRadarWindow", __FUNCTION__);
        //mout.debug("src Scaling0: " , src.getScaling() );
        mout.debug2("src props for odim: " , src.getProperties() );
 
        this->odimSrc.updateFromMap(src.getProperties());
        mout.info("NI=" , this->odimSrc.getNyquist(LOG_WARNING) );
        mout.info("copied odim: " , EncodingODIM(this->odimSrc) );
 
        drain::image::SlidingWindow<C,R>::setSrcFrame(src);
        // direct should be:
        // R::setSrcFrame(src);
        mout.debug2("src Scaling: " , src.getScaling() );
    }
 
    /*
    void setDst(drain::image::ImageFrame & dst){
        drain::Logger mout("SlidingRadarWindow", __FUNCTION__);
        //this->odimSrc.updateFromMap(src.getProperties());
        //mout.debug("copied odim: " , this->odimSrc );
        SlidingWindow<C, RadarWindowCore>::setDst(dst);
    }
    */
 
protected:
 
    virtual
    void initialize() override {
        setImageLimits();
        setRangeNorm(); // interplay setLoopLimits(), with reset() and
        //if (drain::Type::call<drain::typeIsSmallInt>(this->src.getType()) && drain::Type::call<drain::drain::typeIsSmallInt>(this->dst.getType())){
        if (drain::Type::call<drain::typeIsSmallInt>(this->dst.getType())){
            drain::Logger mout("SlidingRadarWindow", __FUNCTION__);
            //this->conf.ftor.setScale(1.0);
            mout.info("(not implemented: functor scaling for small int dst)"  );  // << this->odimSrc
        }
        // what about reset(); ?
        reset();
    };
 
 
    inline
    void setImageLimits() const {
        this->coordinateHandler.set(this->src.getGeometry(), this->src.getCoordinatePolicy());
        // this->src.adjustCoordinateHandler(this->coordinateHandler);
    }
 
    void setRangeNorm(){
 
        drain::Logger mout("SlidingRadarWindow", __FUNCTION__);
 
        if (this->odimSrc.area.height == 0)
            mout.error("src odim.area.height==0" );
 
        const double r = static_cast<double>(this->odimSrc.area.height) / (2.0*M_PI);
        const int max = static_cast<int>(this->odimSrc.area.width);
 
        rangeNorm    = static_cast<int>(r);
        rangeNormEnd = static_cast<int>(r * static_cast<double>(this->conf.frame.height));
        if ((rangeNorm <= 0) || (rangeNormEnd >= max)){
            mout.note(rangeNorm , '-' , rangeNormEnd );
        }
        //
    }
 
    int rangeNorm;
    int rangeNormEnd;
    int countMin; // raise
 
 
    virtual inline
    bool reset(){
 
        if (this->location.x <= rangeNorm){
            this->setLoopLimits(this->conf.frame.width, this->conf.frame.height);
        }
        else if (this->location.x < rangeNormEnd){ // from 'height' down to 1
            this->setLoopLimits(this->conf.frame.width, (rangeNorm * this->conf.frame.height)/(this->location.x+1) );
            //std::cerr << "loop limits " << this->jMax << std::endl;
        }
        else {
            this->setLoopLimits(this->conf.frame.width, 1);
        }
        //drain::Logger mout("SlidingRadarWindow", __FUNCTION__);
        //mout.warn(this->iMax , ',' , this->jMax , '\t' , this->getSamplingArea( ));
        countMin = this->conf.contributionThreshold * this->getSamplingArea();
 
        return SlidingWindow<C,R>::reset();
    };
 
};
 
 
template <class C, class R=RadarWindowCore>
class SlidingRadarWindow : public SlidingRadarWindowBase<C,R> { // drain::image::WeightedWindowCore
public:
 
    inline
    SlidingRadarWindow(int width=0, int height=0) : SlidingRadarWindowBase<C,R>(width, height) {
    };
 
    inline
    SlidingRadarWindow(const C & conf) : SlidingRadarWindowBase<C,R>(conf) {
    };
 
 
    virtual inline
    void removePixel(drain::Point2D<int> & p){
        if (this->coordinateHandler.validate(p)){
            double x = this->src.template get<double>(p);
            if ((x != this->odimSrc.nodata) && (x != this->odimSrc.undetect))
                removeTrailingValue(this->odimSrc.scaleForward(x));
        }
    };
 
    virtual inline
    void addPixel(drain::Point2D<int> & p){
        if (this->coordinateHandler.validate(p)){
            double x = this->src.template get<double>(p);
            if ((x != this->odimSrc.nodata) && (x != this->odimSrc.undetect))
                addLeadingValue(this->odimSrc.scaleForward(x));
        }
    };
 
    virtual inline
    void removeTrailingValue(double x){}; // = 0;
 
    virtual inline
    void addLeadingValue(double x){}; // = 0;
 
 
 
};
 
template <class C>
class RadarWindowAvg : public SlidingRadarWindow<C> {
public:
 
    //drain::UnaryFunctor & myFunctor;
 
    RadarWindowAvg(int width=0, int height=0) :
        SlidingRadarWindow<C>(width,height),
        //myFunctor(this->conf.getFunctor()),
        sum(0.0),
        count(0) {
    };
 
    RadarWindowAvg(const RadarWindowAvg & window) :
        SlidingRadarWindow<C>(window),
        //myFunctor(this->conf.getFunctor(window.conf.getFunctorName())), // kludge
        sum(0.0),
        count(0) {
    };
 
    RadarWindowAvg(const C & conf) :
        SlidingRadarWindow<C>(conf),
        // myFunctor(this->conf.getFunctor(conf.getFunctorName())),
        sum(0.0),
        count(0) {
    };
 
 
 
 
    virtual
    inline
    ~RadarWindowAvg(){};
 
    typedef RadarWindowAvg<C> unweighted;
 
protected:
 
    double sum;
    int count;
 
    virtual
    inline
    void clear(){
        sum = 0.0;
        count = 0;
    };
 
    virtual inline
    void removeTrailingValue(double x){
        sum -= x;
        --count;
    };
 
    virtual inline
    void addLeadingValue(double x){
        sum += x;
        ++count;
    };
 
    virtual inline
    void write(){
        if (count > 0){
            //if (this->location.x == this->location.y)
            //  std::cerr << sum << '\t' << count << '\n';
            this->dst.putScaled(this->location.x, this->location.y, this->myFunctor(sum/static_cast<double>(count)));
        }
        else
            this->dst.put(this->location, this->odimSrc.undetect); // ?
    };
 
 
};
 
template <class C>
class RadarWindowWeightedAvg : public SlidingRadarWindow<C> {
public:
 
 
    // Consider metres & degrees?
    RadarWindowWeightedAvg(int width=0, int height=0) : SlidingRadarWindow<C>(width,height) {
    };
 
    RadarWindowWeightedAvg(const RadarWindowWeightedAvg<C> & window) : SlidingRadarWindow<C>(window) {
    };
 
    RadarWindowWeightedAvg(const C & conf) : SlidingRadarWindow<C>(conf) {
    };
 
    virtual inline
    ~RadarWindowWeightedAvg(){};
 
protected:
 
    int count = 0;
 
    // Copied from SlidingStripeAverage
    typedef float sum_t;
    sum_t w = 0.0;
    sum_t sum = 0.0;
    sum_t sumW = 0.0;
 
    virtual inline
    void clear() final {
        this->sum   = 0.0;
        this->sumW  = 0.0;
        this->count = 0;
    };
 
 
    virtual inline
    void addPixel(drain::Point2D<int> & p) final {
        if (this->coordinateHandler.validate(p)){
            double x = this->src.template get<double>(p);
            if (this->odimSrc.isValue(x)){
                this->w     = this->srcWeight.template get<sum_t>(p);
                this->sum  += w*this->odimSrc.scaling.fwd(x);
                this->sumW += w;
                ++this->count;
            }
        }
    };
 
    virtual inline
    void removePixel(drain::Point2D<int> & p) final {
        if (this->coordinateHandler.validate(p)){
            double x = this->src.template get<double>(p);
            if (this->odimSrc.isValue(x)){
                this->w     = this->srcWeight.template get<sum_t>(p);
                this->sum  -= w*this->odimSrc.scaling.fwd(x);
                this->sumW -= w;
                --this->count;
            }
        }
    };
 
    virtual inline
    void write() final {
        if (sumW > 0.0){ // then also count>0
            this->dst.put(this->location, this->odimSrc.scaling.inv(this->sum/sumW));
            //this->dstWeight.put(this->location, this->scalingW.inv(sumW/static_cast<sum_t>(this->count)));
            this->dstWeight.put(this->location, sumW/static_cast<sum_t>(this->count)); // "uses" original scaling
        }
        else {
            this->dst.put(this->location, this->odimSrc.undetect); // change
            this->dstWeight.put(this->location, 0);
        }
 
    }
 
    /*
    virtual inline
    void removeTrailingValue(double x) final {
        sum -= x;
        --count;
    };
 
    virtual inline
    void addLeadingValue(double x) final {
        sum += x;
        ++count;
    };
 
    virtual inline
    void write(){
        if (count > 0){
            //if (this->location.x == this->location.y)
            //  std::cerr << sum << '\t' << count << '\n';
            this->dst.putScaled(this->location.x, this->location.y, this->myFunctor(sum/static_cast<double>(count)));
        }
        else
            this->dst.put(this->location, this->odimSrc.undetect); // ?
    };
    */
 
 
};
 
 
template <class C>
class RadarWindowSoftMax : public SlidingRadarWindow<C> {
public:
 
    RadarWindowSoftMax(int width=0, int height=0, double coeff=1.0) : SlidingRadarWindow<C>(width,height), coeff(1.0), coeffInv(1.0/coeff), sum(0.0), count(0) {};
 
 
    virtual inline
    ~RadarWindowSoftMax(){};
 
    void setCoeff(double c){
        if (c==0.0)
            throw std::runtime_error("RadarWindowSoftMax: zero coeff");
        coeff = c;
        coeffInv = 1.0/c;
    };
 
protected:
 
    double coeff;
    double coeffInv;
 
    double sum;
    int count;
 
    virtual inline
    void clear(){
        sum = 0.0;
        count = 0;
    };
 
    virtual inline
    void removeTrailingValue(double x){
        sum -= ::exp(coeff * x);
        --count;
    };
 
    virtual inline
    void addLeadingValue(double x){
        sum += ::exp(coeff * x);
        ++count;
        //if ((p.x == p.y) && (x > -15.0))
        //  std::cerr << "handleLeadingPixel" << p << ':' << x << '\t' << count << ':' << sum << std::endl;
    };
 
    virtual inline
    void write(){
        if (count > 0)
            this->dst.put(this->location, this->fuzzifier(coeffInv*::log(sum/static_cast<double>(count))));
        //this->dst.put(this->location, this->functor(sum/static_cast<double>(count)));
    };
 
 
};
 
 
template <class F>
class RadarWindowStdDev : public SlidingRadarWindow<F> {
public:
 
    RadarWindowStdDev(int width=0, int height=0) : SlidingRadarWindow<F>(width,height), sum(0.0), sum2(0.0), count(0) {};
 
 
    virtual inline
    ~RadarWindowStdDev(){};
 
protected:
 
    double sum;
    double sum2;
    int count;
 
    virtual inline
    void clear(){
        sum  = 0.0;
        sum2 = 0.0;
        count = 0;
    };
 
    virtual
    inline
    void removeTrailingValue(double x){
        sum -= x;
        sum2 -= x*x;
        --count;
    };
 
    virtual
    inline
    void addLeadingValue(double x){
        sum += x;
        sum2 += x*x;
        ++count;
        //if ((this->p.x == this->p.y) && (x > -15.0))
        //  std::cerr << "handleLeadingPixel" << this->p << ':' << x << '\t' << count << ':' << sum << std::endl;
    };
 
    virtual
    inline
    void write(){
 
        if (count > 0){
            double countD = static_cast<double>(count);
            this->dst.put(this->location, this->fuzzifier( ::sqrt(sum2/countD - sum*sum/(countD*countD)) ));
            /*
            countD = sum2/countD - sum*sum/(countD*countD);
            if ((this->p.x == this->p.y) && (count > 5))
                std::cerr << __FUNCTION__ << this->p << ':' << countD << std::endl;
             */
        }
        else
            this->dst.put(this->location, 0);
 
    };
 
 
};
 
 
 
 
 
 
 
} // rack::
 
 
 
 
#endif
 
// Rack