-#include <string.h>
+// @(#) $Id$
-#include <TH2.h>
+// Author: Anders Vestbo <mailto:vestbo@fi.uib.no>
+//*-- Copyright © ALICE HLT Group
+#include <strings.h>
+#include "AliL3StandardIncludes.h"
+
+#ifndef no_root
+#include <TNtuple.h>
+#include <TFile.h>
+#endif
+
+#include "AliL3Logging.h"
+#include "AliL3HoughMaxFinder.h"
+#include "AliL3Histogram.h"
#include "AliL3TrackArray.h"
#include "AliL3HoughTrack.h"
-#include "AliL3HoughMaxFinder.h"
+#include "AliL3Transform.h"
+#include "AliL3HoughTransformerRow.h"
+
+#if __GNUC__ == 3
+using namespace std;
+#endif
+
+/** \class AliL3HoughMaxFinder
+<pre>
+//_____________________________________________________________
+// AliL3HoughMaxFinder
+//
+// Maximum finder
+//
+</pre>
+*/
ClassImp(AliL3HoughMaxFinder)
{
//Default constructor
fThreshold = 0;
- //fTracks = 0;
+ fCurrentEtaSlice = -1;
fHistoType=0;
+ fXPeaks=0;
+ fYPeaks=0;
+ fWeight=0;
+ fNPeaks=0;
+ fN1PeaksPrevEtaSlice=0;
+ fN2PeaksPrevEtaSlice=0;
+ fSTARTXPeaks=0;
+ fSTARTYPeaks=0;
+ fENDXPeaks=0;
+ fENDYPeaks=0;
+ fSTARTETAPeaks=0;
+ fENDETAPeaks=0;
+ fNMax=0;
+ fGradX=1;
+ fGradY=1;
+#ifndef no_root
+ fNtuppel = 0;
+#endif
}
-
-AliL3HoughMaxFinder::AliL3HoughMaxFinder(Char_t *histotype)
+AliL3HoughMaxFinder::AliL3HoughMaxFinder(Char_t *histotype,Int_t nmax,AliL3Histogram *hist)
{
//Constructor
//fTracks = new AliL3TrackArray("AliL3HoughTrack");
if(strcmp(histotype,"KappaPhi")==0) fHistoType='c';
if(strcmp(histotype,"DPsi")==0) fHistoType='l';
+
+ fCurrentEtaSlice = -1;
+
+ if(hist)
+ fCurrentHisto = hist;
+ fGradX=1;
+ fGradY=1;
+ fNMax=nmax;
+ fXPeaks = new Float_t[fNMax];
+ fYPeaks = new Float_t[fNMax];
+ fWeight = new Int_t[fNMax];
+ fSTARTXPeaks = new Int_t[fNMax];
+ fSTARTYPeaks = new Int_t[fNMax];
+ fENDXPeaks = new Int_t[fNMax];
+ fENDYPeaks = new Int_t[fNMax];
+ fSTARTETAPeaks = new Int_t[fNMax];
+ fENDETAPeaks = new Int_t[fNMax];
+#ifndef no_root
+ fNtuppel = 0;
+#endif
+ fThreshold=0;
}
-
AliL3HoughMaxFinder::~AliL3HoughMaxFinder()
{
//Destructor
+ if(fXPeaks)
+ delete [] fXPeaks;
+ if(fYPeaks)
+ delete [] fYPeaks;
+ if(fWeight)
+ delete [] fWeight;
+ if(fSTARTXPeaks)
+ delete [] fSTARTXPeaks;
+ if(fSTARTYPeaks)
+ delete [] fSTARTYPeaks;
+ if(fENDXPeaks)
+ delete [] fENDXPeaks;
+ if(fENDYPeaks)
+ delete [] fENDYPeaks;
+ if(fSTARTETAPeaks)
+ delete [] fSTARTETAPeaks;
+ if(fENDETAPeaks)
+ delete [] fENDETAPeaks;
+#ifndef no_root
+ if(fNtuppel)
+ delete fNtuppel;
+#endif
+}
+void AliL3HoughMaxFinder::Reset()
+{
+ // Method to reinit the Peak Finder
+ for(Int_t i=0; i<fNMax; i++)
+ {
+ fXPeaks[i]=0;
+ fYPeaks[i]=0;
+ fWeight[i]=0;
+ fSTARTXPeaks[i]=0;
+ fSTARTYPeaks[i]=0;
+ fENDXPeaks[i]=0;
+ fENDYPeaks[i]=0;
+ fSTARTETAPeaks[i]=0;
+ fENDETAPeaks[i]=0;
+ }
+ fNPeaks=0;
+ fN1PeaksPrevEtaSlice=0;
+ fN2PeaksPrevEtaSlice=0;
}
+void AliL3HoughMaxFinder::CreateNtuppel()
+{
+ // Fill a NTuple with the peak parameters
+#ifndef no_root
+ //content#; neighbouring bins of the peak.
+ fNtuppel = new TNtuple("ntuppel","Peak charateristics","kappa:phi0:weigth:content3:content5:content1:content7");
+ fNtuppel->SetDirectory(0);
+#endif
+}
-AliL3TrackArray *AliL3HoughMaxFinder::FindMaxima(TH2F *hist,Int_t *rowrange,Int_t ref_row)
+void AliL3HoughMaxFinder::WriteNtuppel(Char_t *filename)
+{
+ // Write the NTuple with the peak parameters
+#ifndef no_root
+ TFile *file = TFile::Open(filename,"RECREATE");
+ if(!file)
+ {
+ cerr<<"AliL3HoughMaxFinder::WriteNtuppel : Error opening file "<<filename<<endl;
+ return;
+ }
+ fNtuppel->Write();
+ file->Close();
+#endif
+}
+
+void AliL3HoughMaxFinder::FindAbsMaxima()
+{
+ // Simple Peak Finder in the Hough space
+ if(!fCurrentHisto)
+ {
+ cerr<<"AliL3HoughMaxFinder::FindAbsMaxima : No histogram"<<endl;
+ return;
+ }
+ AliL3Histogram *hist = fCurrentHisto;
+
+ if(hist->GetNEntries() == 0)
+ return;
+
+ Int_t xmin = hist->GetFirstXbin();
+ Int_t xmax = hist->GetLastXbin();
+ Int_t ymin = hist->GetFirstYbin();
+ Int_t ymax = hist->GetLastYbin();
+ Int_t bin;
+ Double_t value,maxvalue=0;
+
+ Int_t maxxbin=0,maxybin=0;
+ for(Int_t xbin=xmin; xbin<=xmax; xbin++)
+ {
+ for(Int_t ybin=ymin; ybin<=ymax; ybin++)
+ {
+ bin = hist->GetBin(xbin,ybin);
+ value = hist->GetBinContent(bin);
+ if(value>maxvalue)
+ {
+ maxvalue = value;
+ maxxbin = xbin;
+ maxybin = ybin;
+ }
+ }
+ }
+
+ if(maxvalue == 0)
+ return;
+
+ if(fNPeaks > fNMax)
+ {
+ cerr<<"AliL3HoughMaxFinder::FindAbsMaxima : Array out of range : "<<fNPeaks<<endl;
+ return;
+ }
+
+ Double_t maxx = hist->GetBinCenterX(maxxbin);
+ Double_t maxy = hist->GetBinCenterY(maxybin);
+ fXPeaks[fNPeaks] = maxx;
+ fYPeaks[fNPeaks] = maxy;
+ fWeight[fNPeaks] = (Int_t)maxvalue;
+
+ fNPeaks++;
+#ifndef no_root
+ if(fNtuppel)
+ {
+ Int_t bin3 = hist->GetBin(maxxbin-1,maxybin);
+ Int_t bin5 = hist->GetBin(maxxbin+1,maxybin);
+ Int_t bin1 = hist->GetBin(maxxbin,maxybin-1);
+ Int_t bin7 = hist->GetBin(maxxbin,maxybin+1);
+
+ fNtuppel->Fill(maxx,maxy,maxvalue,hist->GetBinContent(bin3),hist->GetBinContent(bin5),hist->GetBinContent(bin1),hist->GetBinContent(bin7));
+ }
+#endif
+}
+
+void AliL3HoughMaxFinder::FindBigMaxima()
+{
+ // Another Peak finder
+ AliL3Histogram *hist = fCurrentHisto;
+
+ if(hist->GetNEntries() == 0)
+ return;
+
+ Int_t xmin = hist->GetFirstXbin();
+ Int_t xmax = hist->GetLastXbin();
+ Int_t ymin = hist->GetFirstYbin();
+ Int_t ymax = hist->GetLastYbin();
+ Int_t bin[25],binindex;
+ Double_t value[25];
+
+ for(Int_t xbin=xmin+2; xbin<xmax-3; xbin++)
+ {
+ for(Int_t ybin=ymin+2; ybin<ymax-3; ybin++)
+ {
+ binindex=0;
+ for(Int_t xb=xbin-2; xb<=xbin+2; xb++)
+ {
+ for(Int_t yb=ybin-2; yb<=ybin+2; yb++)
+ {
+ bin[binindex]=hist->GetBin(xb,yb);
+ value[binindex]=hist->GetBinContent(bin[binindex]);
+ binindex++;
+ }
+ }
+ if(value[12]==0) continue;
+ Int_t b=0;
+ while(1)
+ {
+ if(value[b] > value[12] || b==binindex) break;
+ b++;
+ //printf("b %d\n",b);
+ }
+ if(b == binindex)
+ {
+ //Found maxima
+ if(fNPeaks > fNMax)
+ {
+ cerr<<"AliL3HoughMaxFinder::FindBigMaxima : Array out of range "<<fNPeaks<<endl;
+ return;
+ }
+
+ Double_t maxx = hist->GetBinCenterX(xbin);
+ Double_t maxy = hist->GetBinCenterY(ybin);
+ fXPeaks[fNPeaks] = maxx;
+ fYPeaks[fNPeaks] = maxy;
+ fNPeaks++;
+ }
+ }
+ }
+}
+
+void AliL3HoughMaxFinder::FindMaxima(Int_t threshold)
{
//Locate all the maxima in input histogram.
//Maxima is defined as bins with more entries than the
//immediately neighbouring bins.
- Int_t xmin = hist->GetXaxis()->GetFirst();
- Int_t xmax = hist->GetXaxis()->GetLast();
- Int_t ymin = hist->GetYaxis()->GetFirst();
- Int_t ymax = hist->GetYaxis()->GetLast();
- Int_t bin[9],track_counter=0;
- Stat_t value[9];
+ if(fCurrentHisto->GetNEntries() == 0)
+ return;
+
+ Int_t xmin = fCurrentHisto->GetFirstXbin();
+ Int_t xmax = fCurrentHisto->GetLastXbin();
+ Int_t ymin = fCurrentHisto->GetFirstYbin();
+ Int_t ymax = fCurrentHisto->GetLastYbin();
+ Int_t bin[9];
+ Double_t value[9];
- AliL3TrackArray *tracks = new AliL3TrackArray("AliL3HoughTrack");
- AliL3HoughTrack *track;
+ //Float_t max_kappa = 0.001;
+ //Float_t max_phi0 = 0.08;
- for(Int_t xbin=xmin+1; xbin<xmax-1; xbin++)
+ for(Int_t xbin=xmin+1; xbin<=xmax-1; xbin++)
{
- for(Int_t ybin=ymin+1; ybin<ymax-1; ybin++)
+ for(Int_t ybin=ymin+1; ybin<=ymax-1; ybin++)
{
- bin[0] = hist->GetBin(xbin-1,ybin-1);
- bin[1] = hist->GetBin(xbin,ybin-1);
- bin[2] = hist->GetBin(xbin+1,ybin-1);
- bin[3] = hist->GetBin(xbin-1,ybin);
- bin[4] = hist->GetBin(xbin,ybin);
- bin[5] = hist->GetBin(xbin+1,ybin);
- bin[6] = hist->GetBin(xbin-1,ybin+1);
- bin[7] = hist->GetBin(xbin,ybin+1);
- bin[8] = hist->GetBin(xbin+1,ybin+1);
- value[0] = hist->GetBinContent(bin[0]);
- value[1] = hist->GetBinContent(bin[1]);
- value[2] = hist->GetBinContent(bin[2]);
- value[3] = hist->GetBinContent(bin[3]);
- value[4] = hist->GetBinContent(bin[4]);
- value[5] = hist->GetBinContent(bin[5]);
- value[6] = hist->GetBinContent(bin[6]);
- value[7] = hist->GetBinContent(bin[7]);
- value[8] = hist->GetBinContent(bin[8]);
+ bin[0] = fCurrentHisto->GetBin(xbin-1,ybin-1);
+ bin[1] = fCurrentHisto->GetBin(xbin,ybin-1);
+ bin[2] = fCurrentHisto->GetBin(xbin+1,ybin-1);
+ bin[3] = fCurrentHisto->GetBin(xbin-1,ybin);
+ bin[4] = fCurrentHisto->GetBin(xbin,ybin);
+ bin[5] = fCurrentHisto->GetBin(xbin+1,ybin);
+ bin[6] = fCurrentHisto->GetBin(xbin-1,ybin+1);
+ bin[7] = fCurrentHisto->GetBin(xbin,ybin+1);
+ bin[8] = fCurrentHisto->GetBin(xbin+1,ybin+1);
+ value[0] = fCurrentHisto->GetBinContent(bin[0]);
+ value[1] = fCurrentHisto->GetBinContent(bin[1]);
+ value[2] = fCurrentHisto->GetBinContent(bin[2]);
+ value[3] = fCurrentHisto->GetBinContent(bin[3]);
+ value[4] = fCurrentHisto->GetBinContent(bin[4]);
+ value[5] = fCurrentHisto->GetBinContent(bin[5]);
+ value[6] = fCurrentHisto->GetBinContent(bin[6]);
+ value[7] = fCurrentHisto->GetBinContent(bin[7]);
+ value[8] = fCurrentHisto->GetBinContent(bin[8]);
- if(value[4] <= fThreshold) continue;//central bin below threshold
if(value[4]>value[0] && value[4]>value[1] && value[4]>value[2]
&& value[4]>value[3] && value[4]>value[5] && value[4]>value[6]
&& value[4]>value[7] && value[4]>value[8])
{
//Found a local maxima
- Float_t max_x = hist->GetXaxis()->GetBinCenter(xbin);
- Float_t max_y = hist->GetYaxis()->GetBinCenter(ybin);
+ Float_t maxx = fCurrentHisto->GetBinCenterX(xbin);
+ Float_t maxy = fCurrentHisto->GetBinCenterY(ybin);
- track = (AliL3HoughTrack*)tracks->NextTrack();
+ if((Int_t)value[4] <= threshold) continue;//central bin below threshold
+ if(fNPeaks >= fNMax)
+ {
+ cout<<"AliL3HoughMaxFinder::FindMaxima : Array out of range "<<fNPeaks<<endl;
+ return;
+ }
+ //Check the gradient:
+ if(value[3]/value[4] > fGradX && value[5]/value[4] > fGradX)
+ continue;
+
+ if(value[1]/value[4] > fGradY && value[7]/value[4] > fGradY)
+ continue;
+
+ fXPeaks[fNPeaks] = maxx;
+ fYPeaks[fNPeaks] = maxy;
+ fWeight[fNPeaks] = (Int_t)value[4];
+ fNPeaks++;
+
+ /*
+ //Check if the peak is overlapping with a previous:
+ Bool_t bigger = kFALSE;
+ for(Int_t p=0; p<fNPeaks; p++)
+ {
+ if(fabs(maxx - fXPeaks[p]) < max_kappa && fabs(maxy - fYPeaks[p]) < max_phi0)
+ {
+ bigger = kTRUE;
+ if(value[4] > fWeight[p]) //this peak is bigger.
+ {
+ fXPeaks[p] = maxx;
+ fYPeaks[p] = maxy;
+ fWeight[p] = (Int_t)value[4];
+ }
+ else
+ continue; //previous peak is bigger.
+ }
+ }
+ if(!bigger) //there were no overlapping peaks.
+ {
+ fXPeaks[fNPeaks] = maxx;
+ fYPeaks[fNPeaks] = maxy;
+ fWeight[fNPeaks] = (Int_t)value[4];
+ fNPeaks++;
+ }
+ */
+ }
+ }
+ }
+
+}
+
+struct AliL3Window
+{
+ Int_t fStart; // Start
+ Int_t fSum; // Sum
+};
+
+void AliL3HoughMaxFinder::FindAdaptedPeaks(Int_t kappawindow,Float_t cutratio)
+{
+ //Peak finder which looks for peaks with a certain shape.
+ //The first step involves a pre-peak finder, which looks for peaks
+ //in windows (size controlled by kappawindow) summing over each psi-bin.
+ //These pre-preaks are then matched between neighbouring kappa-bins to
+ //look for real 2D peaks exhbiting the typical cross-shape in the Hough circle transform.
+ //The maximum bin within this region is marked as the peak itself, and
+ //a few checks is performed to avoid the clear fake peaks (asymmetry check etc.)
+
+
+ AliL3Histogram *hist = fCurrentHisto;
+
+ if(!hist)
+ {
+ cerr<<"AliL3HoughMaxFinder : No histogram!"<<endl;
+ return;
+ }
+
+ if(hist->GetNEntries() == 0)
+ return;
+
+ Int_t xmin = hist->GetFirstXbin();
+ Int_t xmax = hist->GetLastXbin();
+ Int_t ymin = hist->GetFirstYbin();
+ Int_t ymax = hist->GetLastYbin();
+
+
+ //Start by looking for pre-peaks:
+
+ AliL3Window **localmaxima = new AliL3Window*[hist->GetNbinsY()];
+
+ Short_t *nmaxs = new Short_t[hist->GetNbinsY()];
+ Int_t n,lastsum,sum;
+ Bool_t sumwasrising;
+ for(Int_t ybin=ymin; ybin<=ymax; ybin++)
+ {
+ localmaxima[ybin-ymin] = new AliL3Window[hist->GetNbinsX()];
+ nmaxs[ybin-ymin] = 0;
+ sumwasrising=0;
+ lastsum=0;
+ n=0;
+ for(Int_t xbin=xmin; xbin<=xmax-kappawindow; xbin++)
+ {
+ sum=0;
+ for(Int_t lbin=xbin; lbin<xbin+kappawindow; lbin++)
+ sum += hist->GetBinContent(hist->GetBin(lbin,ybin));
+
+ if(sum < lastsum)
+ {
+ if(sum > fThreshold)
+ if(sumwasrising)//Previous sum was a local maxima
+ {
+ localmaxima[ybin-ymin][nmaxs[ybin-ymin]].fStart = xbin-1;
+ localmaxima[ybin-ymin][nmaxs[ybin-ymin]].fSum = lastsum;
+ nmaxs[ybin-ymin]++;
+ }
- switch(fHistoType)
+ sumwasrising=0;
+ }
+ else if(sum > 0)
+ sumwasrising=1;
+ lastsum=sum;
+ }
+ }
+
+ Int_t match=0;
+ Int_t *starts = new Int_t[hist->GetNbinsY()+1];
+ Int_t *maxs = new Int_t[hist->GetNbinsY()+1];
+
+ for(Int_t ybin=ymax; ybin >= ymin+1; ybin--)
+ {
+ for(Int_t i=0; i<nmaxs[ybin-ymin]; i++)
+ {
+ Int_t lw = localmaxima[ybin-ymin][i].fSum;
+
+ if(lw<0)
+ continue; //already used
+
+ Int_t maxvalue=0,maxybin=0,maxxbin=0,maxwindow=0;
+ for(Int_t k=localmaxima[ybin-ymin][i].fStart; k<localmaxima[ybin-ymin][i].fStart + kappawindow; k++)
+ if(hist->GetBinContent(hist->GetBin(k,ybin)) > maxvalue)
+ {
+ maxvalue = hist->GetBinContent(hist->GetBin(k,ybin));
+ maxybin = ybin;
+ maxxbin = k;
+ }
+
+ //start expanding in the psi-direction:
+
+ Int_t lb = localmaxima[ybin-ymin][i].fStart;
+ //Int_t ystart=ybin;
+ starts[ybin] = localmaxima[ybin-ymin][i].fStart;
+ maxs[ybin] = maxxbin;
+ Int_t yl=ybin-1,nybins=1;
+
+ //cout<<"Starting search at ybin "<<ybin<<" start "<<lb<<" with sum "<<localmaxima[ybin-ymin][i].sum<<endl;
+ while(yl >= ymin)
+ {
+ Bool_t found=0;
+ for(Int_t j=0; j<nmaxs[yl-ymin]; j++)
{
- case 'c':
- track->SetTrackParameters(max_x,max_y,(Int_t)value[4]);
- break;
- case 'l':
- track->SetLineParameters(max_x,max_y,(Int_t)value[4],rowrange,ref_row);
+ if( localmaxima[yl-ymin][j].fStart - lb < 0) continue;
+ if( localmaxima[yl-ymin][j].fStart < lb + kappawindow + match &&
+ localmaxima[yl-ymin][j].fStart >= lb && localmaxima[yl-ymin][j].fSum > 0)
+ {
+
+ //cout<<"match at ybin "<<yl<<" yvalue "<<hist->GetBinCenterY(yl)<<" start "<<localmaxima[yl-ymin][j].start<<" sum "<<localmaxima[yl-ymin][j].sum<<endl;
+
+ Int_t lmaxvalue=0,lmaxxbin=0;
+ for(Int_t k=localmaxima[yl-ymin][j].fStart; k<localmaxima[yl-ymin][j].fStart + kappawindow; k++)
+ {
+ if(hist->GetBinContent(hist->GetBin(k,yl)) > maxvalue)
+ {
+ maxvalue = hist->GetBinContent(hist->GetBin(k,yl));
+ maxxbin = k;
+ maxybin = yl;
+ maxwindow = j;
+ }
+ if(hist->GetBinContent(hist->GetBin(k,yl)) > lmaxvalue)//local maxima value
+ {
+ lmaxvalue=hist->GetBinContent(hist->GetBin(k,yl));
+ lmaxxbin=k;
+ }
+ }
+ nybins++;
+ starts[yl] = localmaxima[yl-ymin][j].fStart;
+ maxs[yl] = lmaxxbin;
+ localmaxima[yl-ymin][j].fSum=-1; //Mark as used
+ found=1;
+ lb = localmaxima[yl-ymin][j].fStart;
+ break;//Since we found a match in this bin, we dont have to search it anymore, goto next bin.
+ }
+ }
+ if(!found || yl == ymin)//no more local maximas to be matched, so write the final peak and break the expansion:
+ {
+ if(nybins > 4)
+ {
+ //cout<<"ystart "<<ystart<<" and nybins "<<nybins<<endl;
+
+ Bool_t truepeak=kTRUE;
+
+ //cout<<"Maxima found at xbin "<<maxxbin<<" ybin "<<maxybin<<" value "<<maxvalue<<endl;
+ //cout<<"Starting to sum at xbin "<<starts[maxybin-ymin]<<endl;
+
+
+ //Look in a window on both sides to probe the asymmetry
+ Float_t right=0,left=0;
+ for(Int_t w=maxxbin+1; w<=maxxbin+3; w++)
+ {
+ for(Int_t r=maxybin+1; r<=maxybin+3; r++)
+ {
+ right += (Float_t)hist->GetBinContent(hist->GetBin(w,r));
+ }
+ }
+
+ for(Int_t w=maxxbin-1; w>=maxxbin-3; w--)
+ {
+ for(Int_t r=maxybin+1; r<=maxybin+3; r++)
+ {
+ left += (Float_t)hist->GetBinContent(hist->GetBin(w,r));
+ }
+ }
+
+ //cout<<"ratio "<<right/left<<endl;
+
+ Float_t upperratio=1,lowerratio=1;
+ if(left)
+ upperratio = right/left;
+
+ right=left=0;
+ for(Int_t w=maxxbin+1; w<=maxxbin+3; w++)
+ {
+ for(Int_t r=maxybin-1; r>=maxybin-3; r--)
+ {
+ right += (Float_t)hist->GetBinContent(hist->GetBin(w,r));
+ }
+ }
+
+ for(Int_t w=maxxbin-1; w>=maxxbin-3; w--)
+ {
+ for(Int_t r=maxybin-1; r>=maxybin-3; r--)
+ {
+ left += (Float_t)hist->GetBinContent(hist->GetBin(w,r));
+ }
+ }
+
+ //cout<<"ratio "<<left/right<<endl;
+
+ if(right)
+ lowerratio = left/right;
+
+ if(upperratio > cutratio || lowerratio > cutratio)
+ truepeak=kFALSE;
+
+ if(truepeak)
+ {
+
+ fXPeaks[fNPeaks] = hist->GetBinCenterX(maxxbin);
+ fYPeaks[fNPeaks] = hist->GetBinCenterY(maxybin);
+ fWeight[fNPeaks] = maxvalue;
+ fNPeaks++;
+
+ /*
+ //Calculate the peak using weigthed means:
+ Float_t sum=0;
+ fYPeaks[fNPeaks]=0;
+ for(Int_t k=maxybin-1; k<=maxybin+1; k++)
+ {
+ Float_t lsum = 0;
+ for(Int_t l=starts[k]; l<starts[k]+kappawindow; l++)
+ {
+ lsum += (Float_t)hist->GetBinContent(hist->GetBin(l,k));
+ sum += (Float_t)hist->GetBinContent(hist->GetBin(l,k));
+ }
+ fYPeaks[fNPeaks] += lsum*hist->GetBinCenterY(k);
+ }
+ fYPeaks[fNPeaks] /= sum;
+ Int_t ybin1,ybin2;
+ if(fYPeaks[fNPeaks] < hist->GetBinCenterY(hist->FindYbin(fYPeaks[fNPeaks])))
+ {
+ ybin1 = hist->FindYbin(fYPeaks[fNPeaks])-1;
+ ybin2 = ybin1+1;
+ }
+ else
+ {
+ ybin1 = hist->FindYbin(fYPeaks[fNPeaks]);
+ ybin2 = ybin1+1;
+ }
+
+ Float_t kappa1=0,kappa2=0;
+ sum=0;
+ for(Int_t k=starts[ybin1]; k<starts[ybin1] + kappawindow; k++)
+ {
+ kappa1 += hist->GetBinCenterX(k)*hist->GetBinContent(hist->GetBin(k,ybin1));
+ sum += (Float_t)hist->GetBinContent(hist->GetBin(k,ybin1));
+ }
+ kappa1 /= sum;
+ sum=0;
+ for(Int_t k=starts[ybin2]; k<starts[ybin2] + kappawindow; k++)
+ {
+ kappa2 += hist->GetBinCenterX(k)*hist->GetBinContent(hist->GetBin(k,ybin2));
+ sum += (Float_t)hist->GetBinContent(hist->GetBin(k,ybin2));
+ }
+ kappa2 /= sum;
+
+ fXPeaks[fNPeaks] = ( kappa1*( hist->GetBinCenterY(ybin2) - fYPeaks[fNPeaks] ) +
+ kappa2*( fYPeaks[fNPeaks] - hist->GetBinCenterY(ybin1) ) ) /
+ (hist->GetBinCenterY(ybin2) - hist->GetBinCenterY(ybin1));
+
+ fNPeaks++;
+ */
+ }
+ }
break;
- default:
- printf("AliL3HoughMaxFinder: Error in tracktype\n");
}
-
- track_counter++;
-
+ else
+ yl--;//Search continues...
+ }
+ }
+ }
+
+ for(Int_t i=0; i<hist->GetNbinsY(); i++)
+ delete localmaxima[i];
+
+ delete [] localmaxima;
+ delete [] nmaxs;
+ delete [] starts;
+ delete [] maxs;
+}
+struct AliL3PreYPeak
+{
+ Int_t fStartPosition; // Start position in X
+ Int_t fEndPosition; // End position in X
+ Int_t fMinValue; // Minimum value inside the prepeak
+ Int_t fMaxValue; // Maximum value inside the prepeak
+ Int_t fPrevValue; // Neighbour values
+ Int_t fLeftValue; // Neighbour values
+ Int_t fRightValue; // Neighbour values
+};
+
+void AliL3HoughMaxFinder::FindAdaptedRowPeaks(Int_t kappawindow,Int_t xsize,Int_t ysize)
+{
+ // Peak finder which is working over the Hough Space provided by the AliL3HoughTransformerRow class
+ AliL3Histogram *hist = fCurrentHisto;
+
+ if(!hist)
+ {
+ cerr<<"AliL3HoughMaxFinder : No histogram!"<<endl;
+ return;
+ }
+
+ if(hist->GetNEntries() == 0)
+ return;
+
+ Int_t xmin = hist->GetFirstXbin();
+ Int_t xmax = hist->GetLastXbin();
+ Int_t ymin = hist->GetFirstYbin();
+ Int_t ymax = hist->GetLastYbin();
+ Int_t nxbins = hist->GetNbinsX()+2;
+ Int_t *content = hist->GetContentArray();
+
+ //Start by looking for pre-peaks:
+
+ AliL3PreYPeak **localmaxima = new AliL3PreYPeak*[hist->GetNbinsY()];
+
+ Short_t *nmaxs = new Short_t[hist->GetNbinsY()];
+ memset(nmaxs,0,hist->GetNbinsY()*sizeof(Short_t));
+ Int_t lastvalue=0,value=0;
+ for(Int_t ybin=fNextRow[ymin]; ybin<=ymax; ybin = fNextRow[ybin+1])
+ {
+ localmaxima[ybin-ymin] = new AliL3PreYPeak[nxbins-2];
+ lastvalue = 0;
+ Bool_t found = 0;
+ for(Int_t xbin=xmin; xbin<=xmax; xbin++)
+ {
+ value = content[xbin + nxbins*ybin]; //value = hist->GetBinContent(xbin + nxbins*ybin); //value = hist->GetBinContent(hist->GetBin(xbin,ybin));
+ if(value > 0)
+ {
+ if((value - lastvalue) > 1)
+ {
+ localmaxima[ybin-ymin][nmaxs[ybin-ymin]].fStartPosition = xbin;
+ localmaxima[ybin-ymin][nmaxs[ybin-ymin]].fEndPosition = xbin;
+ localmaxima[ybin-ymin][nmaxs[ybin-ymin]].fMinValue = value;
+ localmaxima[ybin-ymin][nmaxs[ybin-ymin]].fMaxValue = value;
+ localmaxima[ybin-ymin][nmaxs[ybin-ymin]].fPrevValue = 0;
+ localmaxima[ybin-ymin][nmaxs[ybin-ymin]].fLeftValue = lastvalue;
+ found = 1;
+ }
+ if(abs(value - lastvalue) <= 1)
+ {
+ if(found) {
+ localmaxima[ybin-ymin][nmaxs[ybin-ymin]].fEndPosition = xbin;
+ if(value>localmaxima[ybin-ymin][nmaxs[ybin-ymin]].fMaxValue)
+ localmaxima[ybin-ymin][nmaxs[ybin-ymin]].fMaxValue = value;
+ if(value<localmaxima[ybin-ymin][nmaxs[ybin-ymin]].fMinValue)
+ localmaxima[ybin-ymin][nmaxs[ybin-ymin]].fMinValue = value;
+ }
+ }
+ if((value - lastvalue) < -1)
+ {
+ if(found) {
+ localmaxima[ybin-ymin][nmaxs[ybin-ymin]].fRightValue = value;
+ nmaxs[ybin-ymin]++;
+ found = 0;
+ }
+ }
}
else
- continue; //not a maxima
+ {
+ if(found) {
+ localmaxima[ybin-ymin][nmaxs[ybin-ymin]].fRightValue = value;
+ nmaxs[ybin-ymin]++;
+ found = 0;
+ }
+ }
+ lastvalue = value;
+
+ }
+ if(found) {
+ localmaxima[ybin-ymin][nmaxs[ybin-ymin]].fRightValue = 0;
+ nmaxs[ybin-ymin]++;
+ }
+ }
+
+ AliL3Pre2DPeak maxima[500];
+ Int_t nmaxima = 0;
+
+ for(Int_t ybin=ymax; ybin >= ymin; ybin--)
+ {
+ for(Int_t i=0; i<nmaxs[ybin-ymin]; i++)
+ {
+ Int_t localminvalue = localmaxima[ybin-ymin][i].fMinValue;
+ Int_t localmaxvalue = localmaxima[ybin-ymin][i].fMaxValue;
+ Int_t localprevvalue = localmaxima[ybin-ymin][i].fPrevValue;
+ Int_t localnextvalue = 0;
+ Int_t localleftvalue = localmaxima[ybin-ymin][i].fLeftValue;
+ Int_t localrightvalue = localmaxima[ybin-ymin][i].fRightValue;
+
+ if(localminvalue<0)
+ continue; //already used
+
+ //start expanding in the psi-direction:
+
+ Int_t localxstart = localmaxima[ybin-ymin][i].fStartPosition;
+ Int_t localxend = localmaxima[ybin-ymin][i].fEndPosition;
+ Int_t tempxstart = localmaxima[ybin-ymin][i].fStartPosition;
+ Int_t tempxend = localmaxima[ybin-ymin][i].fEndPosition;
+
+ Int_t localy=ybin-1,nybins=1;
+
+ while(localy >= ymin)
+ {
+ Bool_t found=0;
+ for(Int_t j=0; j<nmaxs[localy-ymin]; j++)
+ {
+ if( (localmaxima[localy-ymin][j].fStartPosition <= (tempxend + kappawindow)) && (localmaxima[localy-ymin][j].fEndPosition >= (tempxstart - kappawindow)))
+ {
+ if((localmaxima[localy-ymin][j].fMinValue <= localmaxvalue) && (localmaxima[localy-ymin][j].fMaxValue >= localminvalue))
+ {
+ if(localmaxima[localy-ymin][j].fEndPosition > localxend)
+ localxend = localmaxima[localy-ymin][j].fEndPosition;
+ if(localmaxima[localy-ymin][j].fStartPosition < localxstart)
+ localxstart = localmaxima[localy-ymin][j].fStartPosition;
+ tempxstart = localmaxima[localy-ymin][j].fStartPosition;
+ tempxend = localmaxima[localy-ymin][j].fEndPosition;
+ if(localmaxima[localy-ymin][j].fMinValue < localminvalue)
+ localminvalue = localmaxima[localy-ymin][j].fMinValue;
+ if(localmaxima[localy-ymin][j].fMaxValue > localmaxvalue)
+ localmaxvalue = localmaxima[localy-ymin][j].fMaxValue;
+ if(localmaxima[localy-ymin][j].fRightValue > localrightvalue)
+ localrightvalue = localmaxima[localy-ymin][j].fRightValue;
+ if(localmaxima[localy-ymin][j].fLeftValue > localleftvalue)
+ localleftvalue = localmaxima[localy-ymin][j].fLeftValue;
+ localmaxima[localy-ymin][j].fMinValue = -1;
+ found = 1;
+ nybins++;
+ break;
+ }
+ else
+ {
+ if(localmaxvalue > localmaxima[localy-ymin][j].fPrevValue)
+ localmaxima[localy-ymin][j].fPrevValue = localmaxvalue;
+ if(localmaxima[localy-ymin][j].fMaxValue > localnextvalue)
+ localnextvalue = localmaxima[localy-ymin][j].fMaxValue;
+ }
+ }
+ }
+ if(!found || localy == ymin)//no more local maximas to be matched, so write the final peak and break the expansion:
+ {
+ if((nybins > ysize) && ((localxend-localxstart+1) > xsize) && (localmaxvalue > localprevvalue) && (localmaxvalue > localnextvalue) && (localmaxvalue > localleftvalue) && (localmaxvalue > localrightvalue))
+ // if((nybins > ysize) && ((localxend-localxstart+1) > xsize))
+ {
+ maxima[nmaxima].fX = ((Float_t)localxstart+(Float_t)localxend)/2.0;
+ maxima[nmaxima].fY = ((Float_t)ybin+(Float_t)(localy+1))/2.0;
+ maxima[nmaxima].fSizeX = localxend-localxstart+1;
+ maxima[nmaxima].fSizeY = nybins;
+ maxima[nmaxima].fWeight = (localminvalue+localmaxvalue)/2;
+ maxima[nmaxima].fStartX = localxstart;
+ maxima[nmaxima].fEndX = localxend;
+ maxima[nmaxima].fStartY = localy +1;
+ maxima[nmaxima].fEndY = ybin;
+#ifdef do_mc
+ // cout<<"Peak found at: "<<((Float_t)localxstart+(Float_t)localxend)/2.0<<" "<<((Float_t)ybin+(Float_t)(localy+1))/2.0<<" "<<localminvalue<<" "<<localmaxvalue<<" "<<" with weight "<<(localminvalue+localmaxvalue)/2<<" and size "<<localxend-localxstart+1<<" by "<<nybins<<endl;
+#endif
+ nmaxima++;
+ }
+ break;
+ }
+ else
+ localy--;//Search continues...
+ }
+ }
+ }
+
+ //remove fake tracks
+
+ for(Int_t i = 0; i < (nmaxima - 1); i++)
+ {
+ // if(maxima[i].fWeight < 0) continue;
+ for(Int_t j = i + 1; j < nmaxima; j++)
+ {
+ // if(maxima[j].fWeight < 0) continue;
+ MergeRowPeaks(&maxima[i],&maxima[j],5.0);
}
}
- tracks->QSort();
- return tracks;
+
+ //merge tracks in neighbour eta slices
+ Int_t currentnpeaks = fNPeaks;
+ for(Int_t i = 0; i < nmaxima; i++) {
+ if(maxima[i].fWeight < 0) continue;
+ Bool_t merged = kFALSE;
+ for(Int_t j = fN1PeaksPrevEtaSlice; j < fN2PeaksPrevEtaSlice; j++) {
+ // if(fWeight[j] < 0) continue;
+ // Merge only peaks with limited size in eta
+ if((fENDETAPeaks[j]-fSTARTETAPeaks[j]) >= 2) continue;
+ if((maxima[i].fStartX <= fENDXPeaks[j]+1) && (maxima[i].fEndX >= fSTARTXPeaks[j]-1) && (maxima[i].fStartY <= fENDYPeaks[j]+1) && (maxima[i].fEndY >= fSTARTYPeaks[j]-1)){
+ //merge
+ merged = kTRUE;
+ if(fWeight[j] > 0) {
+ fXPeaks[fNPeaks] = (hist->GetPreciseBinCenterX(maxima[i].fX)+(fENDETAPeaks[j]-fSTARTETAPeaks[j]+1)*fXPeaks[j])/(fENDETAPeaks[j]-fSTARTETAPeaks[j]+2);
+ fYPeaks[fNPeaks] = (hist->GetPreciseBinCenterY(maxima[i].fY)+(fENDETAPeaks[j]-fSTARTETAPeaks[j]+1)*fYPeaks[j])/(fENDETAPeaks[j]-fSTARTETAPeaks[j]+2);
+ fSTARTXPeaks[fNPeaks] = maxima[i].fStartX;
+ fSTARTYPeaks[fNPeaks] = maxima[i].fStartY;
+ fENDXPeaks[fNPeaks] = maxima[i].fEndX;
+ fENDYPeaks[fNPeaks] = maxima[i].fEndY;
+
+ fWeight[fNPeaks] = abs((Int_t)maxima[i].fWeight) + abs(fWeight[j]);
+ fSTARTETAPeaks[fNPeaks] = fSTARTETAPeaks[j];
+ fENDETAPeaks[fNPeaks] = fCurrentEtaSlice;
+ fNPeaks++;
+ }
+ fWeight[j] = -abs(fWeight[j]);
+ }
+ }
+ fXPeaks[fNPeaks] = hist->GetPreciseBinCenterX(maxima[i].fX);
+ fYPeaks[fNPeaks] = hist->GetPreciseBinCenterY(maxima[i].fY);
+ if(!merged)
+ fWeight[fNPeaks] = abs((Int_t)maxima[i].fWeight);
+ else
+ fWeight[fNPeaks] = -abs((Int_t)maxima[i].fWeight);
+ fSTARTXPeaks[fNPeaks] = maxima[i].fStartX;
+ fSTARTYPeaks[fNPeaks] = maxima[i].fStartY;
+ fENDXPeaks[fNPeaks] = maxima[i].fEndX;
+ fENDYPeaks[fNPeaks] = maxima[i].fEndY;
+ fSTARTETAPeaks[fNPeaks] = fCurrentEtaSlice;
+ fENDETAPeaks[fNPeaks] = fCurrentEtaSlice;
+ fNPeaks++;
+ }
+
+ fN1PeaksPrevEtaSlice = currentnpeaks;
+ fN2PeaksPrevEtaSlice = fNPeaks;
+
+ for(Int_t ybin=fNextRow[ymin]; ybin<=ymax; ybin = fNextRow[ybin+1])
+ delete [] localmaxima[ybin-ymin];
+
+ delete [] localmaxima;
+ delete [] nmaxs;
}
-AliL3TrackArray *AliL3HoughMaxFinder::FindPeak(TH2F *hist,Int_t t1,Double_t t2,Int_t t3)
+void AliL3HoughMaxFinder::FindPeak1(Int_t ywindow,Int_t xbinsides)
{
- //Attempt of a more sophisticated peak finder.
+ //Testing mutliple peakfinding.
+ //The algorithm searches the histogram for prepreaks by looking in windows
+ //for each bin on the xaxis. The size of these windows is controlled by ywindow.
+ //Then the prepreaks are sorted according to their weight (sum inside window),
+ //and the peak positions are calculated by taking the weighted mean in both
+ //x and y direction. The size of the peak in x-direction is controlled by xbinsides.
+
+ if(!fCurrentHisto)
+ {
+ printf("AliL3HoughMaxFinder::FindPeak1 : No input histogram\n");
+ return;
+ }
+ if(fCurrentHisto->GetNEntries()==0)
+ return;
+
+ //Int_t ywindow=2;
+ //Int_t xbinsides=1;
+
+ //Float_t max_kappa = 0.001;
+ //Float_t max_phi0 = 0.08;
+
+ Int_t maxsum=0;
+
+ Int_t xmin = fCurrentHisto->GetFirstXbin();
+ Int_t xmax = fCurrentHisto->GetLastXbin();
+ Int_t ymin = fCurrentHisto->GetFirstYbin();
+ Int_t ymax = fCurrentHisto->GetLastYbin();
+ Int_t nbinsx = fCurrentHisto->GetNbinsX()+1;
+
+ AliL3AxisWindow **windowPt = new AliL3AxisWindow*[nbinsx];
+ AliL3AxisWindow **anotherPt = new AliL3AxisWindow*[nbinsx];
+
+ for(Int_t i=0; i<nbinsx; i++)
+ {
+ windowPt[i] = new AliL3AxisWindow;
+#if defined(__DECCXX)
+ bzero((char *)windowPt[i],sizeof(AliL3AxisWindow));
+#else
+ bzero((void*)windowPt[i],sizeof(AliL3AxisWindow));
+#endif
+ anotherPt[i] = windowPt[i];
+ }
+
+ for(Int_t xbin=xmin; xbin<=xmax; xbin++)
+ {
+ maxsum = 0;
+ for(Int_t ybin=ymin; ybin<=ymax-ywindow; ybin++)
+ {
+ Int_t suminwindow=0;
+ for(Int_t b=ybin; b<ybin+ywindow; b++)
+ {
+ //inside window
+ Int_t bin = fCurrentHisto->GetBin(xbin,b);
+ suminwindow += (Int_t)fCurrentHisto->GetBinContent(bin);
+ }
+
+ if(suminwindow > maxsum)
+ {
+ maxsum = suminwindow;
+ windowPt[xbin]->fYmin = ybin;
+ windowPt[xbin]->fYmax = ybin + ywindow;
+ windowPt[xbin]->fWeight = suminwindow;
+ windowPt[xbin]->fXbin = xbin;
+ }
+ }
+ }
+
+ //Sort the windows according to the weight
+ SortPeaks(windowPt,0,nbinsx);
+
+ Float_t top,butt;
+ for(Int_t i=0; i<nbinsx; i++)
+ {
+ top=butt=0;
+ Int_t xbin = windowPt[i]->fXbin;
+
+ if(xbin<xmin || xbin > xmax-1) continue;
+
+ //Check if this is really a local maxima
+ if(anotherPt[xbin-1]->fWeight > anotherPt[xbin]->fWeight ||
+ anotherPt[xbin+1]->fWeight > anotherPt[xbin]->fWeight)
+ continue;
+
+ for(Int_t j=windowPt[i]->fYmin; j<windowPt[i]->fYmax; j++)
+ {
+ //Calculate the mean in y direction:
+ Int_t bin = fCurrentHisto->GetBin(windowPt[i]->fXbin,j);
+ top += (fCurrentHisto->GetBinCenterY(j))*(fCurrentHisto->GetBinContent(bin));
+ butt += fCurrentHisto->GetBinContent(bin);
+ }
+
+ if(butt < fThreshold)
+ continue;
+
+ fXPeaks[fNPeaks] = fCurrentHisto->GetBinCenterX(windowPt[i]->fXbin);
+ fYPeaks[fNPeaks] = top/butt;
+ fWeight[fNPeaks] = (Int_t)butt;
+ //cout<<"mean in y "<<ypeaks[n]<<" on x "<<windowPt[i]->xbin<<" content "<<butt<<endl;
+ fNPeaks++;
+ if(fNPeaks==fNMax)
+ {
+ cerr<<"AliL3HoughMaxFinder::FindPeak1 : Peak array out of range!!!"<<endl;
+ break;
+ }
+ }
+
- AliL3TrackArray *tracks = new AliL3TrackArray("AliL3HoughTrack");
+ //Improve the peaks by including the region around in x.
+ Float_t ytop,ybutt;
+ Int_t prev;
+ Int_t w;
+ for(Int_t i=0; i<fNPeaks; i++)
+ {
+ Int_t xbin = fCurrentHisto->FindXbin(fXPeaks[i]);
+ if(xbin - xbinsides < xmin || xbin + xbinsides > xmax) continue;
+ top=butt=0;
+ ytop=0,ybutt=0;
+ w=0;
+ prev = xbin - xbinsides+1;
+ for(Int_t j=xbin-xbinsides; j<=xbin+xbinsides; j++)
+ {
+ /*
+ //Check if the windows are overlapping:
+ if(anotherPt[j]->ymin > anotherPt[prev]->ymax) {prev=j; continue;}
+ if(anotherPt[j]->ymax < anotherPt[prev]->ymin) {prev=j; continue;}
+ prev = j;
+ */
+
+ top += fCurrentHisto->GetBinCenterX(j)*anotherPt[j]->fWeight;
+ butt += anotherPt[j]->fWeight;
+
+ for(Int_t k=anotherPt[j]->fYmin; k<anotherPt[j]->fYmax; k++)
+ {
+ Int_t bin = fCurrentHisto->GetBin(j,k);
+ ytop += (fCurrentHisto->GetBinCenterY(k))*(fCurrentHisto->GetBinContent(bin));
+ ybutt += fCurrentHisto->GetBinContent(bin);
+ w+=(Int_t)fCurrentHisto->GetBinContent(bin);
+ }
+ }
+
+ fXPeaks[i] = top/butt;
+ fYPeaks[i] = ytop/ybutt;
+ fWeight[i] = w;
+ //cout<<"Setting weight "<<w<<" kappa "<<fXPeaks[i]<<" phi0 "<<fYPeaks[i]<<endl;
+
+ /*
+ //Check if this peak is overlapping with a previous:
+ for(Int_t p=0; p<i; p++)
+ {
+ //cout<<fabs(fXPeaks[p] - fXPeaks[i])<<" "<<fabs(fYPeaks[p] - fYPeaks[i])<<endl;
+ if(fabs(fXPeaks[p] - fXPeaks[i]) < max_kappa &&
+ fabs(fYPeaks[p] - fYPeaks[i]) < max_phi0)
+ {
+ fWeight[i]=0;
+ //break;
+ }
+ }
+ */
+ }
+
+ for(Int_t i=0; i<nbinsx; i++)
+ delete windowPt[i];
+ delete [] windowPt;
+ delete [] anotherPt;
+}
+
+void AliL3HoughMaxFinder::SortPeaks(struct AliL3AxisWindow **a,Int_t first,Int_t last)
+{
+ //General sorting routine
+ //Sort according to PeakCompare()
- Int_t xmin = hist->GetXaxis()->GetFirst();
- Int_t xmax = hist->GetXaxis()->GetLast();
- Int_t ymin = hist->GetYaxis()->GetFirst();
- Int_t ymax = hist->GetYaxis()->GetLast();
- Int_t nbinsx = hist->GetXaxis()->GetNbins();
+ static struct AliL3AxisWindow *tmp;
+ static int i; // "static" to save stack space
+ int j;
+
+ while (last - first > 1) {
+ i = first;
+ j = last;
+ for (;;) {
+ while (++i < last && PeakCompare(a[i], a[first]) < 0)
+ ;
+ while (--j > first && PeakCompare(a[j], a[first]) > 0)
+ ;
+ if (i >= j)
+ break;
+
+ tmp = a[i];
+ a[i] = a[j];
+ a[j] = tmp;
+ }
+ if (j == first) {
+ ++first;
+ continue;
+ }
+ tmp = a[first];
+ a[first] = a[j];
+ a[j] = tmp;
+ if (j - first < last - (j + 1)) {
+ SortPeaks(a, first, j);
+ first = j + 1; // QSort(j + 1, last);
+ } else {
+ SortPeaks(a, j + 1, last);
+ last = j; // QSort(first, j);
+ }
+ }
+
+}
+
+Int_t AliL3HoughMaxFinder::PeakCompare(struct AliL3AxisWindow *a,struct AliL3AxisWindow *b) const
+{
+ // Peak comparison based on peaks weight
+ if(a->fWeight < b->fWeight) return 1;
+ if(a->fWeight > b->fWeight) return -1;
+ return 0;
+}
+
+void AliL3HoughMaxFinder::FindPeak(Int_t t1,Double_t t2,Int_t t3)
+{
+ //Attempt of a more sophisticated peak finder.
+ //Finds the best peak in the histogram, and returns the corresponding
+ //track object.
+
+ if(!fCurrentHisto)
+ {
+ printf("AliL3HoughMaxFinder::FindPeak : No histogram!!\n");
+ return;
+ }
+ AliL3Histogram *hist = fCurrentHisto;
+ if(hist->GetNEntries()==0)
+ return;
+
+ Int_t xmin = hist->GetFirstXbin();
+ Int_t xmax = hist->GetLastXbin();
+ Int_t ymin = hist->GetFirstYbin();
+ Int_t ymax = hist->GetLastYbin();
+ Int_t nbinsx = hist->GetNbinsX()+1;
Int_t *m = new Int_t[nbinsx];
- Int_t *m_low = new Int_t[nbinsx];
- Int_t *m_up = new Int_t[nbinsx];
+ Int_t *mlow = new Int_t[nbinsx];
+ Int_t *mup = new Int_t[nbinsx];
recompute: //this is a goto.
for(Int_t i=0; i<nbinsx; i++)
{
m[i]=0;
- m_low[i]=0;
- m_up[i]=0;
+ mlow[i]=0;
+ mup[i]=0;
}
- Int_t max_x=0,sum=0,max_xbin=0,bin;
+ Int_t maxx=0,sum=0,maxxbin=0,bin=0;
for(Int_t xbin=xmin; xbin<=xmax; xbin++)
{
- for(Int_t ybin=ymin; ybin < ymax - t1; ybin++)
+ for(Int_t ybin=ymin; ybin <= ymax - t1; ybin++)
{
sum = 0;
- for(Int_t y=ybin; y < ybin+t1; y++)
+ for(Int_t y=ybin; y <= ybin+t1; y++)
{
+ if(y>ymax) break;
//Inside window
bin = hist->GetBin(xbin,y);
sum += (Int_t)hist->GetBinContent(bin);
if(sum > m[xbin]) //Max value locally in this xbin
{
m[xbin]=sum;
- m_low[xbin]=ybin;
- m_up[xbin]=ybin + t1 - 1;
+ mlow[xbin]=ybin;
+ mup[xbin]=ybin + t1;
}
}
- if(m[xbin] > max_x) //Max value globally in x-direction
+ if(m[xbin] > maxx) //Max value globally in x-direction
{
- max_xbin = xbin;
- max_x = m[xbin];//sum;
+ maxxbin = xbin;
+ maxx = m[xbin];//sum;
}
}
- //printf("max_xbin %d max_x %d m_low %d m_up %d\n",max_xbin,max_x,m_low[max_xbin],m_up[max_xbin]);
- //printf("ylow %f yup %f\n",hist->GetYaxis()->GetBinCenter(m_low[max_xbin]),hist->GetYaxis()->GetBinCenter(m_up[max_xbin]));
+ //printf("maxxbin %d maxx %d mlow %d mup %d\n",maxxbin,maxx,mlow[maxxbin],mup[maxxbin]);
+ //printf("ylow %f yup %f\n",hist->GetBinCenterY(mlow[maxxbin]),hist->GetBinCenterY(mup[maxxbin]));
//Determine a width in the x-direction
- Int_t x_low=0,x_up=0;
- for(Int_t xbin=max_xbin-1; xbin >= xmin; xbin--)
+ Int_t xlow=0,xup=0;
+
+ for(Int_t xbin=maxxbin-1; xbin >= xmin; xbin--)
{
- if(m[xbin]*t2 < max_x)
+ if(m[xbin] < maxx*t2)
{
- x_low = xbin+1;
+ xlow = xbin+1;
break;
}
}
- for(Int_t xbin = max_xbin+1; xbin <=xmax; xbin++)
+ for(Int_t xbin = maxxbin+1; xbin <=xmax; xbin++)
{
- if(m[xbin]*t2 < max_x)
+ if(m[xbin] < maxx*t2)
{
- x_up = xbin-1;
+ xup = xbin-1;
break;
}
}
- Double_t top=0,butt=0,value,x_peak;
- if(x_up - x_low + 1 > t3)
+ Double_t top=0,butt=0,value,xpeak;
+ if(xup - xlow + 1 > t3)
{
t1 -= 1;
- printf("\nxrange out if limit x_up %d x_low %d\n\n",x_low,x_up);
+ printf("\nxrange out if limit xup %d xlow %d t1 %d\n\n",xlow,xup,t1);
if(t1 > 1)
goto recompute;
else
{
- x_peak = hist->GetXaxis()->GetBinCenter(max_xbin);
+ xpeak = hist->GetBinCenterX(maxxbin);
goto moveon;
}
}
- //printf("xlow %f xup %f\n",hist->GetXaxis()->GetBinCenter(x_low),hist->GetXaxis()->GetBinCenter(x_up));
- //printf("Spread in x %d\n",x_up-x_low +1);
+ //printf("xlow %f xup %f\n",hist->GetBinCenterX(xlow),hist->GetBinCenterX(xup));
+ //printf("Spread in x %d\n",xup-xlow +1);
//Now, calculate the center of mass in x-direction
- for(Int_t xbin=x_low; xbin <= x_up; xbin++)
+ for(Int_t xbin=xlow; xbin <= xup; xbin++)
{
- value = hist->GetXaxis()->GetBinCenter(xbin);
+ value = hist->GetBinCenterX(xbin);
top += value*m[xbin];
butt += m[xbin];
}
- x_peak = top/butt;
+ xpeak = top/butt;
moveon:
//Find the peak in y direction:
- Int_t x_l = hist->GetXaxis()->FindBin(x_peak);
- if(hist->GetXaxis()->GetBinCenter(x_l) > x_peak)
- x_l--;
+ Int_t xl = hist->FindXbin(xpeak);
+ if(hist->GetBinCenterX(xl) > xpeak)
+ xl--;
- Int_t x_u = x_l + 1;
+ Int_t xu = xl + 1;
- if(hist->GetXaxis()->GetBinCenter(x_l) > x_peak || hist->GetXaxis()->GetBinCenter(x_u) <= x_peak)
- printf("\nAliL3HoughMaxFinder::FindPeak : Wrong xrange %f %f %f\n\n",hist->GetXaxis()->GetBinCenter(x_l),x_peak,hist->GetXaxis()->GetBinCenter(x_u));
+ if(hist->GetBinCenterX(xl) > xpeak || hist->GetBinCenterX(xu) <= xpeak)
+ printf("\nAliL3HoughMaxFinder::FindPeak : Wrong xrange %f %f %f\n\n",hist->GetBinCenterX(xl),xpeak,hist->GetBinCenterX(xu));
- //printf("\nxlow %f xup %f\n",hist->GetXaxis()->GetBinCenter(x_l),hist->GetXaxis()->GetBinCenter(x_u));
+ //printf("\nxlow %f xup %f\n",hist->GetBinCenterX(xl),hist->GetBinCenterX(xu));
value=top=butt=0;
- //printf("ylow %f yup %f\n",hist->GetYaxis()->GetBinCenter(m_low[x_l]),hist->GetYaxis()->GetBinCenter(m_up[x_l]));
- //printf("ylow %f yup %f\n",hist->GetYaxis()->GetBinCenter(m_low[x_u]),hist->GetYaxis()->GetBinCenter(m_up[x_u]));
+ //printf("ylow %f yup %f\n",hist->GetBinCenterY(mlow[xl]),hist->GetBinCenterY(mup[xl]));
+ //printf("ylow %f yup %f\n",hist->GetBinCenterY(mlow[xu]),hist->GetBinCenterY(mup[xu]));
- for(Int_t ybin=m_low[x_l]; ybin <= m_up[x_l]; ybin++)
+ for(Int_t ybin=mlow[xl]; ybin <= mup[xl]; ybin++)
{
- value = hist->GetYaxis()->GetBinCenter(ybin);
- bin = hist->GetBin(x_l,ybin);
+ value = hist->GetBinCenterY(ybin);
+ bin = hist->GetBin(xl,ybin);
top += value*hist->GetBinContent(bin);
butt += hist->GetBinContent(bin);
}
- Double_t y_peak_low = top/butt;
+ Double_t ypeaklow = top/butt;
- //printf("y_peak_low %f\n",y_peak_low);
+ //printf("ypeaklow %f\n",ypeaklow);
value=top=butt=0;
- for(Int_t ybin=m_low[x_u]; ybin <= m_up[x_u]; ybin++)
+ for(Int_t ybin=mlow[xu]; ybin <= mup[xu]; ybin++)
{
- value = hist->GetYaxis()->GetBinCenter(ybin);
- bin = hist->GetBin(x_u,ybin);
+ value = hist->GetBinCenterY(ybin);
+ bin = hist->GetBin(xu,ybin);
top += value*hist->GetBinContent(bin);
butt += hist->GetBinContent(bin);
}
- Double_t y_peak_up = top/butt;
+ Double_t ypeakup = top/butt;
- //printf("y_peak_up %f\n",y_peak_up);
+ //printf("ypeakup %f\n",ypeakup);
- Double_t x_value_up = hist->GetXaxis()->GetBinCenter(x_u);
- Double_t x_value_low = hist->GetXaxis()->GetBinCenter(x_l);
+ Double_t xvalueup = hist->GetBinCenterX(xu);
+ Double_t xvaluelow = hist->GetBinCenterX(xl);
- Double_t y_peak = (y_peak_low*(x_value_up - x_peak) + y_peak_up*(x_peak - x_value_low))/(x_value_up - x_value_low);
+ Double_t ypeak = (ypeaklow*(xvalueup - xpeak) + ypeakup*(xpeak - xvaluelow))/(xvalueup - xvaluelow);
//Find the weight:
- bin = hist->FindBin(x_peak,y_peak);
- Int_t weight = (Int_t)hist->GetBinContent(bin);
+ //bin = hist->FindBin(xpeak,ypeak);
+ //Int_t weight = (Int_t)hist->GetBinContent(bin);
- AliL3HoughTrack *track = (AliL3HoughTrack*)tracks->NextTrack();
- track->SetTrackParameters(x_peak,y_peak,weight);
+ //AliL3HoughTrack *track = new AliL3HoughTrack();
+ //track->SetTrackParameters(xpeak,ypeak,weight);
+ fXPeaks[fNPeaks]=xpeak;
+ fYPeaks[fNPeaks]=ypeak;
+ fWeight[fNPeaks]=(Int_t)hist->GetBinContent(bin);
+ fNPeaks++;
- return tracks;
-
- //delete [] m;
- //delete [] m_low;
- //delete [] m_up;
+ delete [] m;
+ delete [] mlow;
+ delete [] mup;
+ //return track;
+}
+
+Float_t AliL3HoughMaxFinder::GetXPeakSize(Int_t i) const
+{
+ // Get X size of a peak
+ if(i<0 || i>fNMax)
+ {
+ STDCERR<<"AliL3HoughMaxFinder::GetXPeakSize : Invalid index "<<i<<STDENDL;
+ return 0;
+ }
+ Float_t binwidth = fCurrentHisto->GetBinWidthX();
+ return binwidth*(fENDXPeaks[i]-fSTARTXPeaks[i]+1);
}
+Float_t AliL3HoughMaxFinder::GetYPeakSize(Int_t i) const
+{
+ // Get Y size of a peak
+ if(i<0 || i>fNMax)
+ {
+ STDCERR<<"AliL3HoughMaxFinder::GetYPeak : Invalid index "<<i<<STDENDL;
+ return 0;
+ }
+ Float_t binwidth = fCurrentHisto->GetBinWidthY();
+ return binwidth*(fENDYPeaks[i]-fSTARTYPeaks[i]+1);
+}
+
+Bool_t AliL3HoughMaxFinder::MergeRowPeaks(AliL3Pre2DPeak *maxima1, AliL3Pre2DPeak *maxima2, Float_t distance)
+{
+ // Check the distance between tracks corresponding to given Hough space peaks and if the
+ // distance is smaller than some threshold value marks the smaller peak as fake
+ AliL3Histogram *hist = fCurrentHisto;
+ Int_t nxbins = hist->GetNbinsX()+2;
+
+ Int_t xtrack1=0,xtrack2=0,ytrack1=0,ytrack2=0;
+ Int_t deltax = 9999;
+ for(Int_t ix1 = maxima1->fStartX; ix1 <= maxima1->fEndX; ix1++) {
+ for(Int_t ix2 = maxima2->fStartX; ix2 <= maxima2->fEndX; ix2++) {
+ if(abs(ix1 - ix2) < deltax) {
+ deltax = abs(ix1 - ix2);
+ xtrack1 = ix1;
+ xtrack2 = ix2;
+ }
+ }
+ }
+ Int_t deltay = 9999;
+ for(Int_t iy1 = maxima1->fStartY; iy1 <= maxima1->fEndY; iy1++) {
+ for(Int_t iy2 = maxima2->fStartY; iy2 <= maxima2->fEndY; iy2++) {
+ if(abs(iy1 - iy2) < deltay) {
+ deltay = abs(iy1 - iy2);
+ ytrack1 = iy1;
+ ytrack2 = iy2;
+ }
+ }
+ }
+ Int_t firstrow1 = fTrackFirstRow[xtrack1 + nxbins*ytrack1];
+ Int_t lastrow1 = fTrackLastRow[xtrack1 + nxbins*ytrack1];
+ Int_t firstrow2 = fTrackFirstRow[xtrack1 + nxbins*ytrack1];
+ Int_t lastrow2 = fTrackLastRow[xtrack1 + nxbins*ytrack1];
+ Int_t firstrow,lastrow;
+ if(firstrow1 < firstrow2)
+ firstrow = firstrow2;
+ else
+ firstrow = firstrow1;
+
+ if(lastrow1 > lastrow2)
+ lastrow = lastrow2;
+ else
+ lastrow = lastrow1;
+
+ AliL3HoughTrack track1;
+ Float_t x1 = hist->GetPreciseBinCenterX(xtrack1);
+ Float_t y1 = hist->GetPreciseBinCenterY(ytrack1);
+ Float_t psi1 = atan((x1-y1)/(AliL3HoughTransformerRow::GetBeta1()-AliL3HoughTransformerRow::GetBeta2()));
+ Float_t kappa1 = 2.0*(x1*cos(psi1)-AliL3HoughTransformerRow::GetBeta1()*sin(psi1));
+ track1.SetTrackParameters(kappa1,psi1,1);
+ Float_t firsthit1[3];
+ if(!track1.GetCrossingPoint(firstrow,firsthit1)) return kFALSE;
+ Float_t lasthit1[3];
+ if(!track1.GetCrossingPoint(lastrow,lasthit1)) return kFALSE;
+
+ AliL3HoughTrack track2;
+ Float_t x2 = hist->GetPreciseBinCenterX(xtrack2);
+ Float_t y2 = hist->GetPreciseBinCenterY(ytrack2);
+ Float_t psi2 = atan((x2-y2)/(AliL3HoughTransformerRow::GetBeta1()-AliL3HoughTransformerRow::GetBeta2()));
+ Float_t kappa2 = 2.0*(x2*cos(psi2)-AliL3HoughTransformerRow::GetBeta1()*sin(psi2));
+ track2.SetTrackParameters(kappa2,psi2,1);
+ Float_t firsthit2[3];
+ if(!track2.GetCrossingPoint(firstrow,firsthit2)) return kFALSE;
+ Float_t lasthit2[3];
+ if(!track2.GetCrossingPoint(lastrow,lasthit2)) return kFALSE;
+
+ Float_t padpitchlow = AliL3Transform::GetPadPitchWidth(AliL3Transform::GetPatch(firstrow));
+ Float_t padpitchup = AliL3Transform::GetPadPitchWidth(AliL3Transform::GetPatch(lastrow));
+ // check the distance between tracks at the edges
+ // cout<<"Check "<<firsthit1[1]<<" "<<firsthit2[1]<<" "<<padpitchlow<<" "<<lasthit1[1]<<" "<<lasthit2[1]<<" "<<padpitchup<<" "<<xtrack1<<" "<<ytrack1<<" "<<xtrack2<<" "<<ytrack2<<endl;
+ if((fabs(firsthit1[1]-firsthit2[1])/padpitchlow + fabs(lasthit1[1]-lasthit2[1])/padpitchup) < distance) {
+ if(maxima1->fSizeX*maxima1->fSizeY > maxima2->fSizeX*maxima2->fSizeY)
+ maxima2->fWeight = -fabs(maxima2->fWeight);
+ if(maxima1->fSizeX*maxima1->fSizeY < maxima2->fSizeX*maxima2->fSizeY)
+ maxima1->fWeight = -fabs(maxima1->fWeight);
+ if(maxima1->fSizeX*maxima1->fSizeY == maxima2->fSizeX*maxima2->fSizeY) {
+ if(maxima1->fStartX > maxima2->fStartX)
+ maxima1->fStartX = maxima2->fStartX;
+ if(maxima1->fStartY > maxima2->fStartY)
+ maxima1->fStartY = maxima2->fStartY;
+ if(maxima1->fEndX < maxima2->fEndX)
+ maxima1->fEndX = maxima2->fEndX;
+ if(maxima1->fEndY < maxima2->fEndY)
+ maxima1->fEndY = maxima2->fEndY;
+ maxima1->fX = ((Float_t)maxima1->fStartX + (Float_t)maxima1->fEndX)/2.0;
+ maxima1->fY = ((Float_t)maxima1->fStartY + (Float_t)maxima1->fEndY)/2.0;
+ maxima1->fSizeX = (maxima1->fEndX - maxima1->fStartX + 1);
+ maxima1->fSizeY = (maxima1->fEndY - maxima1->fStartY + 1);
+ maxima2->fWeight = -fabs(maxima2->fWeight);
+ }
+ return kTRUE;
+ }
+ return kFALSE;
+}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff