DTSegmentCleaner Class Reference

#include <DTSegmentCleaner.h>

List of all members.

Public Types
typedef std::pair < DTHitPairForFit *, DTEnums::DTCellSide >	AssPoint
typedef std::set< AssPoint, DTSegmentCand::AssPointLessZ >	AssPointCont
Public Member Functions
std::vector< DTSegmentCand * >	clean (std::vector< DTSegmentCand * > inputCands) const
	do the cleaning
	DTSegmentCleaner (const edm::ParameterSet &pset)
	~DTSegmentCleaner ()
Private Member Functions
std::vector< DTSegmentCand * >	ghostBuster (std::vector< DTSegmentCand * > inputCands) const
	ghost suppression
std::vector< DTSegmentCand * >	solveConflict (std::vector< DTSegmentCand * > inputCands) const
	solve the conflicts
Private Attributes
int	nSharedHitsMax
int	nUnSharedHitsMin
int	segmCleanerMode

---

Detailed Description

Definition at line 33 of file DTSegmentCleaner.h.

---

Member Typedef Documentation

typedef std::pair<DTHitPairForFit*, DTEnums::DTCellSide> DTSegmentCleaner::AssPoint

Definition at line 37 of file DTSegmentCleaner.h.

typedef std::set<AssPoint, DTSegmentCand::AssPointLessZ> DTSegmentCleaner::AssPointCont

Definition at line 38 of file DTSegmentCleaner.h.

---

Constructor & Destructor Documentation

DTSegmentCleaner::DTSegmentCleaner

(

const edm::ParameterSet &

pset

)

Definition at line 22 of file DTSegmentCleaner.cc.

References edm::ParameterSet::getParameter().

                                                              {
  nSharedHitsMax = pset.getParameter<int>("nSharedHitsMax");

  nUnSharedHitsMin = pset.getParameter<int>("nUnSharedHitsMin");

  segmCleanerMode = pset.getParameter<int>("segmCleanerMode");
 
  if((segmCleanerMode!=1)&&(segmCleanerMode!=2)&&(segmCleanerMode!=3))
    edm::LogError("Muon|RecoLocalMuon|DTSegmentCleaner")
      << "Wrong segmCleanerMode! It must be 1,2 or 3. The default is 1";
}

DTSegmentCleaner::~DTSegmentCleaner

(

)

Definition at line 35 of file DTSegmentCleaner.cc.

                                    {
}

---

Member Function Documentation

std::vector<DTSegmentCand*> DTSegmentCleaner::clean

(

std::vector< DTSegmentCand * >

inputCands

)

const

do the cleaning

Referenced by DTCombinatorialExtendedPatternReco::buildSegments(), DTCombinatorialPatternReco::buildSegments(), and DTMeantimerPatternReco::buildSegments().

vector< DTSegmentCand * > DTSegmentCleaner::ghostBuster

(

std::vector< DTSegmentCand * >

inputCands

)

const [private]

ghost suppression

Definition at line 132 of file DTSegmentCleaner.cc.

References query::result.

                                                                     {
  vector<DTSegmentCand*> ghosts;
  for (vector<DTSegmentCand*>::iterator cand=inputCands.begin();
       cand!=inputCands.end(); ++cand) {
    for (vector<DTSegmentCand*>::iterator cand2=cand+1;
         cand2!=inputCands.end(); ++cand2) {
      unsigned int nSharedHits=(*cand)->nSharedHitPairs(*(*cand2));
      // cout << "Sharing " << (**cand) << " " << (**cand2) << " " << nSharedHits
      //   << " (first or second) " << ((**cand)<(**cand2)) << endl;
      if ((nSharedHits==((*cand)->nHits())) && (nSharedHits==((*cand2)->nHits()))
          &&(fabs((*cand)->chi2()-(*cand2)->chi2())<0.1)
          &&(segmCleanerMode==3))
      {
        continue;
      }

      // remove the worst segment if too many shared hits or too few unshared
      if ((int)nSharedHits >= nSharedHitsMax ||
          (int)((*cand)->nHits()-nSharedHits)<=nUnSharedHitsMin ||
          (int)((*cand2)->nHits()-nSharedHits)<=nUnSharedHitsMin) {

        if ((**cand)<(**cand2)) {
          ghosts.push_back(*cand);
        }
        else {
          ghosts.push_back(*cand2);
        }
        continue;
      }

    }
  }

  vector<DTSegmentCand*> result;
  for (vector<DTSegmentCand*>::const_iterator cand=inputCands.begin();
       cand!=inputCands.end(); ++cand) {
    bool isGhost=false;
    for (vector<DTSegmentCand*>::const_iterator ghost=ghosts.begin();
         ghost!=ghosts.end(); ++ghost) {
      if ((*cand)==(*ghost)) {
        isGhost=true;
        break;
      }
    }
    if (!isGhost) result.push_back(*cand);
    else delete *cand;
  }
  // cout << "No Ghosts ------" << endl;
  // for (vector<DTSegmentCand*>::iterator cand=result.begin();
  //      cand!=result.end(); ++cand) {
  //   cout << "cand " << *cand << " nH " <<(*cand)->nHits() << " chi2 " << (*cand)->chi2() << endl;
  // }
  // cout << "----------------" << endl;

  return result;
}

vector< DTSegmentCand * > DTSegmentCleaner::solveConflict

(

std::vector< DTSegmentCand * >

inputCands

)

const [private]

solve the conflicts

treatment of LR ambiguity cases: 1 chooses the best chi2 2 chooses the smaller angle 3 keeps both candidates

Definition at line 49 of file DTSegmentCleaner.cc.

References listHistos::IP, DTSegmentCand::removeHit(), query::result, PV3DBase< T, PVType, FrameType >::theta(), PV3DBase< T, PVType, FrameType >::x(), and PV3DBase< T, PVType, FrameType >::z().

                                                                                              {
  vector<DTSegmentCand*> result;

  vector<DTSegmentCand*> ghosts;


  for (vector<DTSegmentCand*>::iterator cand=inputCands.begin();
       cand!=inputCands.end(); ++cand) {
    for (vector<DTSegmentCand*>::iterator cand2 = cand+1 ; cand2!=inputCands.end() ; ++cand2) {

      DTSegmentCand::AssPointCont confHits=(*cand)->conflictingHitPairs(*(*cand2));

      if (confHits.size()) {
        if((confHits.size())==((*cand)->nHits()) && (confHits.size())==((*cand2)->nHits())
           && (fabs((*cand)->chi2()-(*cand2)->chi2())<0.1) ) { // cannot choose on the basis of # of hits or chi2

          if(segmCleanerMode == 2) { // mode 2: choose on the basis of the angle

            DTSegmentCand* badCand = 0;
            if((*cand)->superLayer()->id().superlayer() != 2) { // we are in the phi view

              LocalVector dir1 = (*cand)->direction();
              LocalVector dir2 = (*cand2)->direction();
              float phi1=(atan((dir1.x())/(dir1.z())));
              float phi2=(atan((dir2.x())/(dir2.z())));

              badCand = (fabs(phi1) > fabs(phi2)) ? (*cand) : (*cand2);

            } else {  // we are in the theta view: choose the most pointing one

              GlobalPoint IP;

              GlobalVector cand1GlobDir = (*cand)->superLayer()->toGlobal((*cand)->direction());
              GlobalPoint cand1GlobPos =  (*cand)->superLayer()->toGlobal((*cand)->position());
              GlobalVector cand1GlobVecIP = cand1GlobPos-IP;
              float DAlpha1 = fabs(cand1GlobDir.theta()-cand1GlobVecIP.theta());


              GlobalVector cand2GlobDir = (*cand2)->superLayer()->toGlobal((*cand2)->direction());
              GlobalPoint cand2GlobPos = (*cand2)->superLayer()->toGlobal((*cand2)->position());
              GlobalVector cand2GlobVecIP = cand2GlobPos-IP;
              float DAlpha2 = fabs(cand2GlobDir.theta()-cand2GlobVecIP.theta());

              badCand = (DAlpha1 > DAlpha2) ? (*cand) : (*cand2);
                
            }

            for (DTSegmentCand::AssPointCont::const_iterator cHit=confHits.begin() ;
                 cHit!=confHits.end(); ++cHit) {
              badCand->removeHit(*cHit);
            }
              
          } else { // mode 3: keep both candidates
            continue;
          }     

        } else { // mode 1: take > # hits or best chi2
          DTSegmentCand* badCand = (**cand) < (**cand2) ? (*cand) : (*cand2);
          for (DTSegmentCand::AssPointCont::const_iterator cHit=confHits.begin() ;
               cHit!=confHits.end(); ++cHit) badCand->removeHit(*cHit);
        }

      }
    }
  }

 
  vector<DTSegmentCand*>::iterator cand=inputCands.begin();
  while ( cand < inputCands.end() ) {
    if ((*cand)->good()) result.push_back(*cand);
    else {
      vector<DTSegmentCand*>::iterator badCand=cand;
      delete *badCand;
    }
    ++cand;
  }
  return result;
}

---

Member Data Documentation

int DTSegmentCleaner::nSharedHitsMax [private]

Definition at line 57 of file DTSegmentCleaner.h.

int DTSegmentCleaner::nUnSharedHitsMin [private]

Definition at line 58 of file DTSegmentCleaner.h.

int DTSegmentCleaner::segmCleanerMode [private]

treatment of LR ambiguity cases: 1 chooses the best chi2 2 chooses the smaller angle 3 keeps both candidates

Definition at line 62 of file DTSegmentCleaner.h.