BridgingWireHitRelationFilter Class Reference

Wire hit relation filter that is compensating for hit inefficiencies. More...

#include <BridgingWireHitRelationFilter.h>

Inheritance diagram for BridgingWireHitRelationFilter:

Public Types
using	Object = AObject
	Type of the object to be analysed.
using	Interface = Filter< AObject >
	Mark this class as the basic interface.

Public Member Functions
	BridgingWireHitRelationFilter ()
	Default constructor.
	~BridgingWireHitRelationFilter ()
	Default destructor.
void	exposeParameters (ModuleParamList *moduleParamList, const std::string &prefix) override
	Expose the set of parameters of the filter to the module parameter list.
void	initialize () override
	Receive signal at the begin of the event processing and prepare some parameters.
std::vector< CDCWireHit * >	getPossibleTos (CDCWireHit *from, const std::vector< CDCWireHit * > &wireHits) const final
	Returns a vector containing the neighboring wire hits of the given wire hit out of the sorted range given by the two iterator other arguments.
virtual std::vector< CDCWireHit * >	getPossibleTos (CDCWireHit *from, const std::vector< CDCWireHit * > &objects) const
	Selects the objects possibly related to the given one from the given pool of objects.
virtual Weight	operator() (const CDCWireHit &from, const CDCWireHit &to)
	Main filter method returning the weight of the neighborhood relation.
virtual std::vector< float >	operator() (const std::vector< Relation< CDCWireHit > * > &objs) override
	Filter over a vector of relations.
Weight	operator() (const Relation< CDCWireHit > &relation) override
	Main filter method overriding the filter interface method.
virtual Weight	operator() (const Object &obj)
	Function to evaluate the object.
Weight	operator() (const Object *obj)
	Function to evaluate the object.
virtual std::vector< float >	operator() (const std::vector< Object * > &objs)
	Function to evaluate a vector of objects Base implementation applies the function to each object.
virtual bool	needsTruthInformation ()
	Indicates if the filter requires Monte Carlo information.
void	beginRun () override
	Receive and dispatch signal for the beginning of a new run.
void	beginEvent () override
	Receive and dispatch signal for the start of a new event.
void	endRun () override
	Receive and dispatch signal for the end of the run.
void	terminate () override
	Receive and dispatch Signal for termination of the event processing.

Protected Member Functions
void	addProcessingSignalListener (ProcessingSignalListener *psl)
	Register a processing signal listener to be notified.
int	getNProcessingSignalListener ()
	Get the number of currently registered listeners.

Private Types
using	Super = RelationFilter< CDCWireHit >
	Type of the base class.

Private Attributes
std::map< int, int >	m_param_missingPrimaryNeighborThresholdMap
	Parameter: A map from o'clock direction to the number of missing primary drift cells.
std::array< short, 12 >	m_missingPrimaryNeighborThresholds
	Array for the number of primary drift cells to be included for the o'clock position at each index.
std::vector< short >	m_consideredSecondaryNeighbors
	Indices of the considered o'clock positions of the secondary neighborhood.
std::vector< ProcessingSignalListener * >	m_subordinaryProcessingSignalListeners
	References to subordinary signal processing listener contained in this findlet.
bool	m_initialized = false
	Flag to keep track whether initialization happened before.
bool	m_terminated = false
	Flag to keep track whether termination happened before.
std::string	m_initializedAs
	Name of the type during initialisation.

Detailed Description

Wire hit relation filter that is compensating for hit inefficiencies.

The default setup counters some hits lost due to a drift time cut off if the track enters at the edge of a drift cell. The biggest effect observed in the CDC simulation was observed when the track is along the 2, 4, 8 and 10 o'clock direction since in this case two neighboring hits can be lost due to this time cut off. In an attempt to detect if this occurred the primary wire hit neighborhood is slightly extended to bridge to the secondary neighborhood in the critical directions.

The criterion can be lowered such that fewer missing hits trigger the inclusion of the secondary neighbors.

Definition at line 40 of file BridgingWireHitRelationFilter.h.

Member Typedef Documentation

Interface

using Interface = Filter<AObject>

inherited

Mark this class as the basic interface.

Definition at line 38 of file Filter.dcl.h.

Object

using Object = AObject

inherited

Type of the object to be analysed.

Definition at line 35 of file Filter.dcl.h.

Super

using Super = RelationFilter<CDCWireHit>

private

Type of the base class.

Definition at line 44 of file BridgingWireHitRelationFilter.h.

Member Function Documentation

addProcessingSignalListener()

void addProcessingSignalListener ( ProcessingSignalListener *  psl )

protectedinherited

Register a processing signal listener to be notified.

Definition at line 55 of file CompositeProcessingSignalListener.cc.

{
  m_subordinaryProcessingSignalListeners.push_back(psl);
}

beginEvent()

void beginEvent ( )

overridevirtualinherited

Receive and dispatch signal for the start of a new event.

Reimplemented from ProcessingSignalListener.

Reimplemented in SpacePointTagger< Belle2::CKFToPXDResult, Belle2::PXDCluster >, SpacePointTagger< Belle2::CKFToSVDResult, Belle2::SVDCluster >, BaseEventTimeExtractor< RecoTrack * >, BaseEventTimeExtractor< TrackFindingCDC::CDCWireHit & >, SharingHitsMatcher< Belle2::TrackFindingCDC::CDCTrack, Belle2::TrackFindingCDC::CDCSegment2D >, MCSymmetric< BaseAxialSegmentPairFilter >, MCSymmetric< BaseFacetFilter >, MCSymmetric< BaseFacetRelationFilter >, MCSymmetric< BaseSegmentPairFilter >, MCSymmetric< BaseSegmentPairRelationFilter >, MCSymmetric< BaseSegmentRelationFilter >, MCSymmetric< BaseSegmentTripleFilter >, MCSymmetric< BaseSegmentTripleRelationFilter >, MCSymmetric< BaseTrackRelationFilter >, StoreVectorSwapper< Belle2::TrackFindingCDC::CDCFacet >, StoreVectorSwapper< Belle2::TrackFindingCDC::CDCWireHit, true >, StoreVectorSwapper< Belle2::TrackFindingCDC::CDCSegment2D >, StoreVectorSwapper< Belle2::TrackFindingCDC::CDCTrack >, StoreVectorSwapper< Belle2::TrackFindingCDC::CDCSegmentPair >, StoreVectorSwapper< Belle2::TrackFindingCDC::CDCSegmentTriple >, RecoTrackStorer, ROIFinder, and SVDHoughTracking.

Definition at line 31 of file CompositeProcessingSignalListener.cc.

{
  Super::beginEvent();
  for (ProcessingSignalListener* psl : m_subordinaryProcessingSignalListeners) {
    psl->beginEvent();
  }
}

beginRun()

void beginRun ( )

overridevirtualinherited

Receive and dispatch signal for the beginning of a new run.

Reimplemented from ProcessingSignalListener.

Reimplemented in LayerRelationFilter< AFilter >, FourHitFilter, QualityIndicatorFilter, ThreeHitFilter, TwoHitVirtualIPFilter, TwoHitVirtualIPQIFilter, RecoTrackStorer, ROIFinder, SpacePointLoaderAndPreparer, and TrackCandidateResultRefiner.

Definition at line 23 of file CompositeProcessingSignalListener.cc.

{
  Super::beginRun();
  for (ProcessingSignalListener* psl : m_subordinaryProcessingSignalListeners) {
    psl->beginRun();
  }
}

endRun()

void endRun ( )

overridevirtualinherited

Receive and dispatch signal for the end of the run.

Reimplemented from ProcessingSignalListener.

Definition at line 39 of file CompositeProcessingSignalListener.cc.

{
  for (ProcessingSignalListener* psl : reversedRange(m_subordinaryProcessingSignalListeners)) {
    psl->endRun();
  }
  Super::endRun();
}

exposeParameters()

void exposeParameters ( ModuleParamList *  moduleParamList, const std::string &  prefix  )

overridevirtual

Expose the set of parameters of the filter to the module parameter list.

Reimplemented from Filter< AObject >.

Definition at line 37 of file BridgingWireHitRelationFilter.cc.

{
  moduleParamList
  ->addParameter(prefixed(prefix, "missingPrimaryNeighborThresholds"),
                 m_param_missingPrimaryNeighborThresholdMap,
                 "Map of o'clock directions to number of missing drift cells "
                 "in the primary neighborhood to trigger the inclusion of secondary neighbors "
                 "in that very o'clock direction",
                 m_param_missingPrimaryNeighborThresholdMap);
}

getNProcessingSignalListener()

int getNProcessingSignalListener ( )

protectedinherited

Get the number of currently registered listeners.

Definition at line 60 of file CompositeProcessingSignalListener.cc.

{
  return m_subordinaryProcessingSignalListeners.size();
}

getPossibleTos() [1/2]

std::vector< CDCWireHit * > getPossibleTos ( CDCWireHit *  from, const std::vector< CDCWireHit * > &  objects  ) const

virtualinherited

Selects the objects possibly related to the given one from the given pool of objects.

Definition at line 39 of file RelationFilter.icc.h.

    {
      return objects;
    }

getPossibleTos() [2/2]

std::vector< CDCWireHit * > getPossibleTos ( CDCWireHit *  from, const std::vector< CDCWireHit * > &  wireHits  ) const

final

Returns a vector containing the neighboring wire hits of the given wire hit out of the sorted range given by the two iterator other arguments.

Merge the sorted primary and secondary neighbors.

Definition at line 68 of file BridgingWireHitRelationFilter.cc.

{
  assert(std::is_sorted(wireHits.begin(), wireHits.end(), LessOf<Deref>()) &&
         "Expected wire hits to be sorted");
 
  std::vector<std::pair<const CDCWire*, int>> wireNeighbors;
  wireNeighbors.reserve(8);
 
  std::vector<CDCWireHit*> wireHitNeighbors;
  wireHitNeighbors.reserve(12);
 
  std::array<short, 12> missingPrimaryNeighbor = {0};
 
  const CDCWireTopology& wireTopology = CDCWireTopology::getInstance();
 
  const CDCWire& wire = from->getWire();
 
  // Analyse primary neighborhood - sorted such that the wire hits relations are most likely sorted.
  for (short oClockDirection : {5, 7, 3, 9, 1, 11}) {
    MayBePtr<const CDCWire> neighborWire = wireTopology.getPrimaryNeighbor(oClockDirection, wire);
    if (neighborWire) wireNeighbors.emplace_back(neighborWire, oClockDirection);
  }
 
  std::sort(std::begin(wireNeighbors), std::end(wireNeighbors));
 
  for (std::pair<const CDCWire*, int> wireAndOClockDirection : wireNeighbors) {
    const CDCWire* neighborWire = wireAndOClockDirection.first;
    int oClockDirection = wireAndOClockDirection.second;
 
    ConstVectorRange<CDCWireHit*> wireHitRange{
      std::equal_range(wireHits.begin(), wireHits.end(), neighborWire, LessOf<Deref>())};
    if (wireHitRange.empty()) {
      int ccwOClockDirection = oClockDirection - 1;
      int cwOClockDirection = oClockDirection == 11 ? 0 : oClockDirection + 1;
      ++missingPrimaryNeighbor[ccwOClockDirection];
      ++missingPrimaryNeighbor[oClockDirection];
      ++missingPrimaryNeighbor[cwOClockDirection];
    }
    wireHitNeighbors.insert(wireHitNeighbors.end(), wireHitRange.begin(), wireHitRange.end());
  }
 
  size_t nPrimaryWireHitNeighbors = wireHitNeighbors.size();
  wireNeighbors.clear();
 
  // Analyse secondary neighborhood
  for (short oClockDirection : m_consideredSecondaryNeighbors) {
    MayBePtr<const CDCWire> neighborWire = wireTopology.getSecondaryNeighbor(oClockDirection, wire);
    if (not neighborWire) continue;
    if (missingPrimaryNeighbor[oClockDirection] <
        m_missingPrimaryNeighborThresholds[oClockDirection])
      continue;
    wireNeighbors.emplace_back(neighborWire, oClockDirection);
  }
 
  std::sort(std::begin(wireNeighbors), std::end(wireNeighbors));
 
  for (std::pair<const CDCWire*, int> wireAndOClockDirection : wireNeighbors) {
    const CDCWire* neighborWire = wireAndOClockDirection.first;
    ConstVectorRange<CDCWireHit*> wireHitRange{
      std::equal_range(wireHits.begin(), wireHits.end(), neighborWire, LessOf<Deref>())};
    wireHitNeighbors.insert(wireHitNeighbors.end(), wireHitRange.begin(), wireHitRange.end());
  }
 
  std::inplace_merge(wireHitNeighbors.begin(),
                     wireHitNeighbors.begin() + nPrimaryWireHitNeighbors,
                     wireHitNeighbors.end(),
                     std::less<CDCWireHit*>());
 
  return wireHitNeighbors;
}

initialize()

void initialize ( )

overridevirtual

Receive signal at the begin of the event processing and prepare some parameters.

Prepare the lookup such that it turns out most likely sorted.

Reimplemented from ProcessingSignalListener.

Definition at line 49 of file BridgingWireHitRelationFilter.cc.

{
  Super::initialize();
  for (short oClockDirection = 0; oClockDirection < 12; oClockDirection++) {
    m_missingPrimaryNeighborThresholds[oClockDirection] = 3;
    if (m_param_missingPrimaryNeighborThresholdMap.count(oClockDirection)) {
      m_missingPrimaryNeighborThresholds[oClockDirection] =
        m_param_missingPrimaryNeighborThresholdMap[oClockDirection];
    }
  }
 
  for (short oClockDirection : {5, 6, 7, 4, 8, 3, 9, 2, 10, 1, 0, 11}) {
    if (m_missingPrimaryNeighborThresholds[oClockDirection] < 3) {
      m_consideredSecondaryNeighbors.push_back(oClockDirection);
    }
  }
}

needsTruthInformation()

bool needsTruthInformation

virtualinherited

Indicates if the filter requires Monte Carlo information.

Reimplemented in MCSymmetric< BaseAxialSegmentPairFilter >, MCSymmetric< BaseFacetFilter >, MCSymmetric< BaseFacetRelationFilter >, MCSymmetric< BaseSegmentPairFilter >, MCSymmetric< BaseSegmentPairRelationFilter >, MCSymmetric< BaseSegmentRelationFilter >, MCSymmetric< BaseSegmentTripleFilter >, MCSymmetric< BaseSegmentTripleRelationFilter >, MCSymmetric< BaseTrackRelationFilter >, OnVarSet< Filter< ATruthVarSet::Object > >, OnVarSet< Filter< AVarSet::Object > >, OnVarSet< BaseFacetFilter >, OnVarSet< BaseFacetRelationFilter >, OnVarSet< BaseAxialSegmentPairFilter >, OnVarSet< BaseSegmentRelationFilter >, OnVarSet< BaseTrackRelationFilter >, and OnVarSet< BaseSegmentPairRelationFilter >.

Definition at line 46 of file Filter.icc.h.

    {
      return false;
    }

operator()() [1/6]

Weight operator() ( const CDCWireHit &  from, const CDCWireHit &  to  )

virtualinherited

Main filter method returning the weight of the neighborhood relation.

Return always returns NAN to reject all segment neighbors.

Definition at line 46 of file RelationFilter.icc.h.

    {
      return 1;
    }

operator()() [2/6]

Weight operator() ( const Object &  obj )

virtualinherited

Function to evaluate the object.

Base implementation accepts all objects.

Parameters

obj	The object to be accepted or rejected.

Returns

A finite float value if the object is accepted. NAN if the object is rejected.

Reimplemented in SeedChargeCDCPathFilter, SizeCDCPathFilter, ArcLengthBasedCDCfromEclPathPairFilter, ArcLengthBasedCDCPathPairFilter, Chi2BasedCDCPathPairFilter, DistanceBasedCDCPathPairFilter, DuplicateCDCPathPairFilter, HitDistanceBasedCDCPathPairFilter, MCTruthCDCPathPairFilter, DistanceCDCStateFilter, ExtrapolateAndUpdateCDCStateFilter, MCTruthCDCStateFilter, MCTruthEclSeedFilter, RoughCDCfromEclStateFilter, RoughCDCStateFilter, FiveHitFilter, FourHitFilter, QualityIndicatorFilter, ThreeHitFilter, TwoHitVirtualIPFilter, TwoHitVirtualIPQIFilter, SimplePXDStateFilter, AllPXDStateFilter, ResidualSVDStateFilter, SimpleSVDStateFilter, AllSVDStateFilter, and RelationFilter< AObject >.

Definition at line 52 of file Filter.icc.h.

    {
      return 1;
    }

operator()() [3/6]

Weight operator() ( const Object *  obj )

inherited

Function to evaluate the object.

Base implementation accepts all objects, except nullptr.

Parameters

obj	The object to be accepted or rejected.

Returns

A finit float value if the object is accepted. NAN if the object is rejected. Nullptr is always rejected.

Definition at line 58 of file Filter.icc.h.

    {
      return obj ? operator()(*obj) : NAN;
    }

operator()() [4/6]

Weight operator() ( const Relation< CDCWireHit > &  relation )

overrideinherited

Main filter method overriding the filter interface method.

Checks the validity of the pointers in the relation and unpacks the relation to the method implementing the rejection.

Definition at line 69 of file RelationFilter.icc.h.

    {
      const AObject* from = relation.getFrom();
      const AObject* to = relation.getTo();
 
      if (from == to) return NAN; // Prevent relation to same.
      if ((from == nullptr) or (to == nullptr)) return NAN;
      return operator()(*from, *to);
    }

operator()() [5/6]

std::vector< float > operator() ( const std::vector< Object * > &  objs )

virtualinherited

Function to evaluate a vector of objects Base implementation applies the function to each object.

Can be optimized for MVA filters

Parameters

objs	A vector of pointers to objects

Returns

A vector of float or NAN values. See above

Definition at line 64 of file Filter.icc.h.

    {
      std::vector<float> out;
      for (const auto& obj : objs) {
        out.push_back(operator()(obj));
      }
      return out;
    }

operator()() [6/6]

virtual std::vector< float > operator() ( const std::vector< Relation< CDCWireHit > * > &  objs )

inlineoverridevirtualinherited

Filter over a vector of relations.

We need to override it since derived relation classes do not implement a call with a pointer to a relation.

Definition at line 51 of file RelationFilter.dcl.h.

      {
        std::vector<float> out(objs.size());
        for (size_t iObj = 0; iObj < objs.size(); iObj += 1) {
          if (objs[iObj]) {
            out[iObj] = operator()(*objs[iObj]);
          } else {
            out[iObj] = NAN;
          }
        }
        return out;
      }

terminate()

void terminate ( )

overridevirtualinherited

Receive and dispatch Signal for termination of the event processing.

Reimplemented from ProcessingSignalListener.

Reimplemented in StereoHitTrackQuadTreeMatcher< Belle2::TrackFindingCDC::HyperHough >, StereoHitTrackQuadTreeMatcher< Belle2::TrackFindingCDC::QuadraticLegendre >, and StereoHitTrackQuadTreeMatcher< Belle2::TrackFindingCDC::Z0TanLambdaLegendre >.

Definition at line 47 of file CompositeProcessingSignalListener.cc.

{
  for (ProcessingSignalListener* psl : reversedRange(m_subordinaryProcessingSignalListeners)) {
    psl->terminate();
  }
  Super::terminate();
}

Member Data Documentation

m_consideredSecondaryNeighbors

std::vector<short> m_consideredSecondaryNeighbors

private

Indices of the considered o'clock positions of the secondary neighborhood.

Definition at line 75 of file BridgingWireHitRelationFilter.h.

m_initialized

bool m_initialized = false

privateinherited

Flag to keep track whether initialization happened before.

Definition at line 52 of file ProcessingSignalListener.h.

m_initializedAs

std::string m_initializedAs

privateinherited

Name of the type during initialisation.

Definition at line 58 of file ProcessingSignalListener.h.

m_missingPrimaryNeighborThresholds

std::array<short, 12> m_missingPrimaryNeighborThresholds

private

Array for the number of primary drift cells to be included for the o'clock position at each index.

Definition at line 72 of file BridgingWireHitRelationFilter.h.

m_param_missingPrimaryNeighborThresholdMap

std::map<int, int> m_param_missingPrimaryNeighborThresholdMap

private

Initial value:

=
      {{0, 2}, {2, 2}, {4, 2}, {6, 2}, {8, 2}, {10, 2}}

Parameter: A map from o'clock direction to the number of missing primary drift cells.

Definition at line 68 of file BridgingWireHitRelationFilter.h.

m_subordinaryProcessingSignalListeners

std::vector<ProcessingSignalListener*> m_subordinaryProcessingSignalListeners

privateinherited

References to subordinary signal processing listener contained in this findlet.

Definition at line 52 of file CompositeProcessingSignalListener.h.

m_terminated

bool m_terminated = false

privateinherited

Flag to keep track whether termination happened before.

Definition at line 55 of file ProcessingSignalListener.h.

---

The documentation for this class was generated from the following files:

• tracking/trackFindingCDC/filters/wireHitRelation/include/BridgingWireHitRelationFilter.h
• tracking/trackFindingCDC/filters/wireHitRelation/src/BridgingWireHitRelationFilter.cc