Inheritance diagram for reco_tool::CandHitMorphological:

Public Member Functions
	CandHitMorphological (const fhicl::ParameterSet &pset)

	~CandHitMorphological ()

void	configure (const fhicl::ParameterSet &pset) override

void	findHitCandidates (const Waveform &, size_t, size_t, size_t, HitCandidateVec &) const override

void	MergeHitCandidates (const Waveform &, const HitCandidateVec &, MergeHitCandidateVec &) const override

Private Types
using	HitCandidate_t = struct HitCandidate{size_t startTick

using	HitCandidateVec = std::vector< HitCandidate_t >

using	MergeHitCandidateVec = std::vector< HitCandidateVec >

using	Waveform = std::vector< float >

Private Member Functions
void	findHitCandidates (Waveform::const_iterator, Waveform::const_iterator, Waveform::const_iterator, Waveform::const_iterator, Waveform::const_iterator, Waveform::const_iterator, size_t, float, HitCandidateVec &) const

void	findHitCandidates (Waveform::const_iterator, Waveform::const_iterator, size_t, int, float, HitCandidateVec &) const

Waveform::const_iterator	findNearestMax (Waveform::const_iterator, Waveform::const_iterator) const

Waveform::const_iterator	findNearestMin (Waveform::const_iterator, Waveform::const_iterator) const

Waveform::const_iterator	findStartTick (Waveform::const_iterator, Waveform::const_iterator) const

Waveform::const_iterator	findStopTick (Waveform::const_iterator, Waveform::const_iterator) const

Private Attributes
size_t	fPlane

float	fDilationThreshold

float	fDilationFraction

float	fErosionFraction

int	fMinDeltaTicks

float	fMinDeltaPeaks

float	fMinHitHeight

size_t	fNumInterveningTicks

int	fStructuringElement

bool	fOutputHistograms

art::TFileDirectory *	fHistDirectory

TH1F *	fDStopStartHist

TH1F *	fDMaxTickMinTickHist

TH1F *	fDMaxDerivMinDerivHist

size_t	fLastChannel

size_t	fChannelCnt

std::unique_ptr< reco_tool::IWaveformTool >	fWaveformTool

const geo::GeometryCore *	fGeometry = lar::providerFrom<geo::Geometry>()

size_t	stopTick

size_t	maxTick

size_t	minTick

float	maxDerivative

float	minDerivative

float	hitCenter

float	hitSigma

float	hitHeight

Detailed Description

Definition at line 26 of file CandHitMorphological_tool.cc.

Member Typedef Documentation

using reco_tool::ICandidateHitFinder::HitCandidate_t = struct HitCandidate { size_t startTick

inherited

Definition at line 30 of file ICandidateHitFinder.h.

using reco_tool::ICandidateHitFinder::HitCandidateVec = std::vector<HitCandidate_t>

inherited

Definition at line 41 of file ICandidateHitFinder.h.

using reco_tool::ICandidateHitFinder::MergeHitCandidateVec = std::vector<HitCandidateVec>

inherited

Definition at line 42 of file ICandidateHitFinder.h.

using reco_tool::ICandidateHitFinder::Waveform = std::vector<float>

inherited

Definition at line 44 of file ICandidateHitFinder.h.

Constructor & Destructor Documentation

reco_tool::CandHitMorphological::CandHitMorphological ( const fhicl::ParameterSet & pset )

explicit

Definition at line 101 of file CandHitMorphological_tool.cc.

References configure().

 {
     configure(pset);
 }

reco_tool::CandHitMorphological::~CandHitMorphological ( )

Definition at line 106 of file CandHitMorphological_tool.cc.

107 {

108 }

Member Function Documentation

void reco_tool::CandHitMorphological::configure ( const fhicl::ParameterSet & pset )

overridevirtual

Implements reco_tool::ICandidateHitFinder.

Definition at line 110 of file CandHitMorphological_tool.cc.

References dir, fChannelCnt, fDilationFraction, fDilationThreshold, fDMaxDerivMinDerivHist, fDMaxTickMinTickHist, fDStopStartHist, fErosionFraction, fHistDirectory, fLastChannel, fMinDeltaPeaks, fMinDeltaTicks, fMinHitHeight, fNumInterveningTicks, fOutputHistograms, fPlane, fStructuringElement, fWaveformTool, art::ServiceHandle< T, SCOPE >::get(), fhicl::ParameterSet::get(), art::TFileDirectory::make(), max, and art::TFileDirectory::mkdir().

Referenced by CandHitMorphological().

 {
     // Recover our parameters
     fPlane               = pset.get< size_t >("Plane",               0);
     fDilationThreshold   = pset.get< float  >("DilationThreshold",   4.);
     fDilationFraction    = pset.get< float  >("DilationFraction",    0.75);
     fErosionFraction     = pset.get< float  >("ErosionFraction",     0.2);
     fMinDeltaTicks       = pset.get< int    >("MinDeltaTicks",       0);
     fMinDeltaPeaks       = pset.get< float  >("MinDeltaPeaks",       0.025);
     fMinHitHeight        = pset.get< float  >("MinHitHeight",        1.0);
     fNumInterveningTicks = pset.get< size_t >("NumInterveningTicks", 6);
     fStructuringElement  = pset.get< int    >("StructuringElement",  20);
     fOutputHistograms    = pset.get< bool   >("OutputHistograms",    false);
 
     // Recover the baseline tool
     fWaveformTool = art::make_tool<reco_tool::IWaveformTool> (pset.get<fhicl::ParameterSet>("WaveformAlgs"));
     
     // Set the last channel to some nonsensical value
     fLastChannel = std::numeric_limits<size_t>::max();
     fChannelCnt  = 0;
     
     // If asked, define the global histograms
     if (fOutputHistograms)
     {
         // Access ART's TFileService, which will handle creating and writing
         // histograms and n-tuples for us.
         art::ServiceHandle<art::TFileService> tfs;
         
         fHistDirectory = tfs.get();
 
         // Make a directory for these histograms
         art::TFileDirectory dir = fHistDirectory->mkdir(Form("HitPlane_%1zu",fPlane));
         
         fDStopStartHist        = dir.make<TH1F>(Form("DStopStart_%1zu", fPlane), ";Delta Stop/Start;",    200, 0., 200.);
         fDMaxTickMinTickHist   = dir.make<TH1F>(Form("DMaxTMinT_%1zu",  fPlane), ";Delta Max/Min Tick;",  200, 0., 200.);
         fDMaxDerivMinDerivHist = dir.make<TH1F>(Form("DMaxDMinD_%1zu",  fPlane), ";Delta Max/Min Deriv;", 200, 0., 200.);
     }
 
     return;
 }

void reco_tool::CandHitMorphological::findHitCandidates	(	const Waveform &	waveform,
		size_t	roiStartTick,
		size_t	channel,
		size_t	eventCount,
		HitCandidateVec &	hitCandidateVec
	)		const

overridevirtual

Implements reco_tool::ICandidateHitFinder.

Definition at line 151 of file CandHitMorphological_tool.cc.

References geo::GeometryCore::ChannelToWire(), dir, fChannelCnt, fDilationThreshold, fDMaxDerivMinDerivHist, fDMaxTickMinTickHist, fDStopStartHist, fGeometry, fHistDirectory, fLastChannel, fOutputHistograms, fStructuringElement, fWaveformTool, art::TFileDirectory::make(), and art::TFileDirectory::mkdir().

Referenced by findHitCandidates().

 {
     // In this case we want to find hit candidates based on the derivative of of the input waveform
     // We get this from our waveform algs too...
     Waveform rawDerivativeVec;
     Waveform derivativeVec;
 
     fWaveformTool->firstDerivative(waveform, rawDerivativeVec);
     fWaveformTool->triangleSmooth(rawDerivativeVec, derivativeVec);
     
     // Now we get the erosion/dilation vectors
     Waveform erosionVec;
     Waveform dilationVec;
     Waveform averageVec;
     Waveform differenceVec;
     
     reco_tool::HistogramMap histogramMap;
     
     // Compute the morphological filter vectors
     fWaveformTool->getErosionDilationAverageDifference(waveform, fStructuringElement, histogramMap, erosionVec, dilationVec, averageVec, differenceVec);
     
     // Now find the hits
     findHitCandidates(derivativeVec.begin(), derivativeVec.end(),
                       erosionVec.begin(),    erosionVec.end(),
                       dilationVec.begin(),   dilationVec.end(),
                       roiStartTick,
                       fDilationThreshold,
                       hitCandidateVec);
     
     // Reset the hit height from the input waveform
     for(auto& hitCandidate : hitCandidateVec)
     {
         size_t centerIdx = hitCandidate.hitCenter;
         
         hitCandidate.hitHeight = waveform.at(centerIdx);
     }
     
     // Keep track of histograms if requested
     if (fOutputHistograms)
     {
         // Recover the details...
         std::vector<geo::WireID> wids  = fGeometry->ChannelToWire(channel);
         size_t                   plane = wids[0].Plane;
         size_t                   cryo  = wids[0].Cryostat;
         size_t                   tpc   = wids[0].TPC;
         size_t                   wire  = wids[0].Wire;
         
         if (channel != fLastChannel) fChannelCnt = 0;
         
         // Make a directory for these histograms
         art::TFileDirectory dir = fHistDirectory->mkdir(Form("HitPlane_%1zu/ev%04zu/c%1zut%1zuwire_%05zu",plane,eventCount,cryo,tpc,wire));
         
         size_t waveformSize = waveform.size();
         int    waveStart    = roiStartTick;
         int    waveStop     = waveStart + waveformSize;
         
         TProfile* waveHist     = dir.make<TProfile>(Form("HWfm_%03zu_ctw%01zu-%01zu-%01zu-%05zu",fChannelCnt,cryo,tpc,plane,wire), "Waveform",   waveformSize, waveStart, waveStop, -500., 500.);
         TProfile* derivHist    = dir.make<TProfile>(Form("HDer_%03zu_ctw%01zu-%01zu-%01zu-%05zu",fChannelCnt,cryo,tpc,plane,wire), "Derivative", waveformSize, waveStart, waveStop, -500., 500.);
         TProfile* erosionHist  = dir.make<TProfile>(Form("HEro_%03zu_ctw%01zu-%01zu-%01zu-%05zu",fChannelCnt,cryo,tpc,plane,wire), "Erosion",    waveformSize, waveStart, waveStop, -500., 500.);
         TProfile* dilationHist = dir.make<TProfile>(Form("HDil_%03zu_ctw%01zu-%01zu-%01zu-%05zu",fChannelCnt,cryo,tpc,plane,wire), "Dilation",   waveformSize, waveStart, waveStop, -500., 500.);
         TProfile* candHitHist  = dir.make<TProfile>(Form("HCan_%03zu_ctw%01zu-%01zu-%01zu-%05zu",fChannelCnt,cryo,tpc,plane,wire), "Cand Hits",  waveformSize, waveStart, waveStop, -500., 500.);
         TProfile* maxDerivHist = dir.make<TProfile>(Form("HMax_%03zu_ctw%01zu-%01zu-%01zu-%05zu",fChannelCnt,cryo,tpc,plane,wire), "Maxima",     waveformSize, waveStart, waveStop, -500., 500.);
         TProfile* strtStopHist = dir.make<TProfile>(Form("HSSS_%03zu_ctw%01zu-%01zu-%01zu-%05zu",fChannelCnt,cryo,tpc,plane,wire), "Start/Stop", waveformSize, waveStart, waveStop, -500., 500.);
 
         // Fill wave/derivative
         for(size_t idx = 0; idx < waveform.size(); idx++)
         {
             waveHist->Fill(roiStartTick + idx, waveform.at(idx));
             derivHist->Fill(roiStartTick + idx, derivativeVec.at(idx));
             erosionHist->Fill(roiStartTick + idx, erosionVec.at(idx));
             dilationHist->Fill(roiStartTick + idx, dilationVec.at(idx));
         }
         
         // Fill hits
         for(const auto& hitCandidate : hitCandidateVec)
         {
             candHitHist->Fill(hitCandidate.hitCenter,  hitCandidate.hitHeight);
             maxDerivHist->Fill(hitCandidate.maxTick,   hitCandidate.maxDerivative);
             maxDerivHist->Fill(hitCandidate.minTick,   hitCandidate.minDerivative);
             strtStopHist->Fill(hitCandidate.startTick, waveform.at(hitCandidate.startTick));
             strtStopHist->Fill(hitCandidate.stopTick,  waveform.at(hitCandidate.stopTick));
 
             fDStopStartHist->Fill(hitCandidate.stopTick - hitCandidate.startTick, 1.);
             fDMaxTickMinTickHist->Fill(hitCandidate.minTick - hitCandidate.maxTick, 1.);
             fDMaxDerivMinDerivHist->Fill(hitCandidate.maxDerivative - hitCandidate.minDerivative, 1.);
         }
         
         fLastChannel = channel;
         fChannelCnt++;
     }
     
     return;
 }

void reco_tool::CandHitMorphological::findHitCandidates	(	Waveform::const_iterator	derivStartItr,
		Waveform::const_iterator	derivStopItr,
		Waveform::const_iterator	erosionStartItr,
		Waveform::const_iterator	erosionStopItr,
		Waveform::const_iterator	dilationStartItr,
		Waveform::const_iterator	dilationStopItr,
		size_t	roiStartTick,
		float	dilationThreshold,
		HitCandidateVec &	hitCandidateVec
	)		const

private

Definition at line 249 of file CandHitMorphological_tool.cc.

References fDilationFraction, fDilationThreshold, fErosionFraction, findHitCandidates(), fMinDeltaPeaks, and fMinDeltaTicks.

 {
     // This function aims to use the erosion/dilation vectors to find candidate hit regions
     // Once armed with a region then the "standard" differential approach is used to return the candidate peaks
     
     // This function is recursive, we start by finding the largest element of the dilation vector
     Waveform::const_iterator maxItr = std::max_element(dilationStartItr,dilationStopItr);
     float                    maxVal = *maxItr;
     
     // Check that the peak is of reasonable height...
     if (maxVal < dilationThreshold) return;
     
     int maxBin = std::distance(dilationStartItr,maxItr);
     
     // The candidate hit region we want lies between the two nearest minima to the maximum we just found
     // subject to the condition that the erosion vector has return to less than zero
     Waveform::const_iterator firstDilItr = maxItr;
     Waveform::const_iterator erosionItr  = erosionStartItr + maxBin;
 
     float firstDilationValue = *firstDilItr;
     float dilationCutValue   = fDilationFraction * maxVal;
     float erosionCutValue    = fErosionFraction * maxVal;
     
     // Search for starting point
     while(firstDilItr != dilationStartItr)
     {
         // Look for the turnover point
         if (*erosionItr-- < erosionCutValue && *firstDilItr < dilationCutValue && *firstDilItr >= firstDilationValue) break;
         
         firstDilationValue = *firstDilItr--;
     }
     
     // Set the start bin
     int hitRegionStart = std::distance(dilationStartItr,firstDilItr);
 
     // Now go the other way
     Waveform::const_iterator lastDilItr = maxItr;
 
     // Reset the local variables
     float lastDilationValue = *lastDilItr;
     
     erosionItr = erosionStartItr + maxBin;
 
     // Search for starting point
     while(++lastDilItr != dilationStopItr)
     {
         if (*++erosionItr <= erosionCutValue && *lastDilItr < dilationCutValue && *lastDilItr >= lastDilationValue) break;
         
         lastDilationValue = *lastDilItr;
     }
     
     // Set the stop bin
     int hitRegionStop = std::distance(dilationStartItr,lastDilItr);
     
     // Recursive call to find any hits in front of where we are now
     if (hitRegionStart > fMinDeltaTicks)
         findHitCandidates(derivStartItr,    derivStartItr    + hitRegionStart,
                           erosionStartItr,  erosionStartItr  + hitRegionStart,
                           dilationStartItr, dilationStartItr + hitRegionStart,
                           roiStartTick,
                           2. * fDilationThreshold,
                           hitCandidateVec);
     
     // Call the differential hit finding to get the actual hits within the region
     findHitCandidates(derivStartItr + hitRegionStart,
                       derivStartItr + hitRegionStop,
                       roiStartTick + hitRegionStart,
                       fMinDeltaTicks,
                       fMinDeltaPeaks,
                       hitCandidateVec);
     
     // Now call ourselves again to find any hits trailing the region we just identified
     if (std::distance(lastDilItr,dilationStopItr) > fMinDeltaTicks)
         findHitCandidates(derivStartItr    + hitRegionStop,    derivStopItr,
                           erosionStartItr  + hitRegionStop,    erosionStopItr,
                           dilationStartItr + hitRegionStop,    dilationStopItr,
                           roiStartTick + hitRegionStop,
                           2. * fDilationThreshold,
                           hitCandidateVec);
 
     return;
 }

void reco_tool::CandHitMorphological::findHitCandidates	(	Waveform::const_iterator	startItr,
		Waveform::const_iterator	stopItr,
		size_t	roiStartTick,
		int	dTicksThreshold,
		float	dPeakThreshold,
		HitCandidateVec &	hitCandidateVec
	)		const

private

Definition at line 337 of file CandHitMorphological_tool.cc.

References findHitCandidates(), findNearestMax(), findNearestMin(), findStartTick(), findStopTick(), fMinDeltaPeaks, fMinDeltaTicks, art::left(), art::right(), and reco_tool::ICandidateHitFinder::stopTick.

 {
     // Search for candidate hits...
     // The idea will be to find the largest deviation in the input derivative waveform as the starting point. Depending
     // on if a maximum or minimum, we search forward or backward to find the minimum or maximum that our extremum
     // corresponds to.
     std::pair<Waveform::const_iterator, Waveform::const_iterator> minMaxPair = std::minmax_element(startItr, stopItr);
     
     Waveform::const_iterator maxItr = minMaxPair.second;
     Waveform::const_iterator minItr = minMaxPair.first;
     
     // Use the larger of the two as the starting point and recover the nearest max or min
     if (std::fabs(*maxItr) > std::fabs(*minItr)) minItr = findNearestMin(maxItr, stopItr);
     else                                         maxItr = findNearestMax(minItr,startItr);
 
     int   deltaTicks = std::distance(maxItr,minItr);
     float range      = *maxItr - *minItr;
     
     // At some point small rolling oscillations on the waveform need to be ignored...
     if (deltaTicks >= dTicksThreshold && range > dPeakThreshold)
     {
         // Need to back up to find zero crossing, this will be the starting point of our
         // candidate hit but also the endpoint of the pre sub-waveform we'll search next
         Waveform::const_iterator newEndItr = findStartTick(maxItr, startItr);
         
         int startTick = std::distance(startItr,newEndItr);
         
         // Now need to go forward to again get close to zero, this will then be the end point
         // of our candidate hit and the starting point for the post sub-waveform to search
         Waveform::const_iterator newStartItr = findStopTick(minItr, stopItr);
         
         int stopTick = std::distance(startItr,newStartItr);
         
         // Find hits in the section of the waveform leading up to this candidate hit
         if (startTick > 2)
         {
             // Special handling for merged hits
             if (*(newEndItr-1) > 0.) {dTicksThreshold = 2;              dPeakThreshold = 0.;            }
             else                     {dTicksThreshold = fMinDeltaTicks; dPeakThreshold = fMinDeltaPeaks;}
             
             findHitCandidates(startItr,newEndItr+1,roiStartTick,dTicksThreshold,dPeakThreshold,hitCandidateVec);
         }
         
         // Create a new hit candidate and store away
         HitCandidate_t hitCandidate;
         
         Waveform::const_iterator peakItr = std::min_element(maxItr,minItr,[](const auto& left, const auto& right){return std::fabs(left) < std::fabs(right);});
         
         // Check balance
         if      (2 * std::distance(peakItr,minItr) < std::distance(maxItr,peakItr)) peakItr--;
         else if (2 * std::distance(maxItr,peakItr) < std::distance(peakItr,minItr)) peakItr++;
         
         // Special handling of the start tick for multiple hits
         size_t hitCandidateStartTick = roiStartTick + startTick;
         
         if (!hitCandidateVec.empty())
         {
             int deltaTicks = hitCandidateStartTick - hitCandidateVec.back().stopTick;
             
             if (deltaTicks > 0)
             {
                 hitCandidateStartTick           -= deltaTicks / 2;
                 hitCandidateVec.back().stopTick += deltaTicks / 2;
             }
         }
         
         hitCandidate.startTick     = hitCandidateStartTick;
         hitCandidate.stopTick      = roiStartTick + stopTick;
         hitCandidate.maxTick       = roiStartTick + std::distance(startItr,maxItr);
         hitCandidate.minTick       = roiStartTick + std::distance(startItr,minItr);
         hitCandidate.maxDerivative = maxItr != stopItr ? *maxItr : 0.;
         hitCandidate.minDerivative = minItr != stopItr ? *minItr : 0.;
         hitCandidate.hitCenter     = roiStartTick + std::distance(startItr,peakItr) + 0.5;
         hitCandidate.hitSigma      = 0.5 * float(hitCandidate.minTick - hitCandidate.maxTick);
         hitCandidate.hitHeight     = hitCandidate.hitSigma * (hitCandidate.maxDerivative - hitCandidate.minDerivative) / 1.2130;
         
         hitCandidateVec.push_back(hitCandidate);
         
         // Finally, search the section of the waveform following this candidate for more hits
         if (std::distance(newStartItr,stopItr) > 2)
         {
             // Special handling for merged hits
             if (*(newStartItr+1) < 0.) {dTicksThreshold = 2;              dPeakThreshold = 0.;            }
             else                       {dTicksThreshold = fMinDeltaTicks; dPeakThreshold = fMinDeltaPeaks;}
             
             findHitCandidates(newStartItr,stopItr,roiStartTick + stopTick,dTicksThreshold,dPeakThreshold,hitCandidateVec);
         }
     }
     
     return;
 }

ICandidateHitFinder::Waveform::const_iterator reco_tool::CandHitMorphological::findNearestMax	(	Waveform::const_iterator	minItr,
		Waveform::const_iterator	startItr
	)		const

private

Definition at line 494 of file CandHitMorphological_tool.cc.

Referenced by findHitCandidates().

 {
     // Set the internal loop variable...
     Waveform::const_iterator lastItr = minItr;
     
     // One extra condition to watch for here, make sure we can actually back up!
     if (std::distance(startItr,minItr) > 0)
     {
         // Similar to searching for a maximum, we loop backward over ticks looking for the waveform to start decreasing
         while((lastItr - 1) != startItr)
         {
             if (*(lastItr - 1) < *lastItr) break;
             
             lastItr--;
         }
     }
     
     return lastItr;
 }

ICandidateHitFinder::Waveform::const_iterator reco_tool::CandHitMorphological::findNearestMin	(	Waveform::const_iterator	maxItr,
		Waveform::const_iterator	stopItr
	)		const

private

Definition at line 476 of file CandHitMorphological_tool.cc.

Referenced by findHitCandidates().

 {
     // reset the min iterator and search forward to find the nearest minimum
     Waveform::const_iterator lastItr = maxItr;
 
     // The strategy is simple...
     // We are at a maximum so we search forward until we find the lowest negative point
     while((lastItr + 1) != stopItr)
     {
         if (*(lastItr + 1) > *lastItr) break;
         
         lastItr++;
     }
     
     // The minimum will be the last iterator value...
     return lastItr;
 }

ICandidateHitFinder::Waveform::const_iterator reco_tool::CandHitMorphological::findStartTick	(	Waveform::const_iterator	maxItr,
		Waveform::const_iterator	startItr
	)		const

private

Definition at line 514 of file CandHitMorphological_tool.cc.

Referenced by findHitCandidates().

 {
     Waveform::const_iterator lastItr = maxItr;
     
     // If we can't back up then there is nothing to do
     if (std::distance(startItr,lastItr) > 0)
     {
         // In theory, we are starting at a maximum and want to find the "start" of the candidate peak
         // Ideally we would look to search backward to the point where the (derivative) waveform crosses zero again.
         // However, the complication is that we need to watch for the case where two peaks are merged together and
         // we might run through another peak before crossing zero...
         // So... loop until we hit the startItr...
         Waveform::const_iterator loopItr = lastItr - 1;
         
         while(loopItr != startItr)
         {
             // Ideal world case, we cross zero... but we might encounter a minimum... or an inflection point
             if (*loopItr < 0. || !(*loopItr < *lastItr)) break;
         
             lastItr = loopItr--;
         }
     }
     else lastItr = startItr;
     
     return lastItr;
 }

ICandidateHitFinder::Waveform::const_iterator reco_tool::CandHitMorphological::findStopTick	(	Waveform::const_iterator	minItr,
		Waveform::const_iterator	stopItr
	)		const

private

Definition at line 541 of file CandHitMorphological_tool.cc.

References DEFINE_ART_CLASS_TOOL.

Referenced by findHitCandidates().

 {
     Waveform::const_iterator lastItr = minItr;
     
     // If we can't go forward then there is really nothing to do
     if (std::distance(minItr,stopItr) > 1)
     {
         // Pretty much the same strategy as for finding the start tick...
         Waveform::const_iterator loopItr = lastItr + 1;
     
         while(loopItr != stopItr)
         {
             // Ideal case that we have crossed zero coming from a minimum... but watch for a maximum as well
             if (*loopItr > 0. || !(*loopItr > *lastItr)) break;
             
             lastItr = loopItr++;
         }
     }
     
     return lastItr;
 }

void reco_tool::CandHitMorphological::MergeHitCandidates	(	const Waveform &	signalVec,
		const HitCandidateVec &	hitCandidateVec,
		MergeHitCandidateVec &	mergedHitsVec
	)		const

overridevirtual

Implements reco_tool::ICandidateHitFinder.

Definition at line 434 of file CandHitMorphological_tool.cc.

References fMinHitHeight, and fNumInterveningTicks.

 {
     // If nothing on the input end then nothing to do
     if (hitCandidateVec.empty()) return;
     
     // The idea is to group hits that "touch" so they can be part of common fit, those that
     // don't "touch" are fit independently. So here we build the output vector to achieve that
     // Get a container for the hits...
     HitCandidateVec groupedHitVec;
     
     // Initialize the end of the last hit which we'll set to the first input hit's stop
     size_t lastStopTick = hitCandidateVec.front().stopTick;
     
     // Step through the input hit candidates and group them by proximity
     for(const auto& hitCandidate : hitCandidateVec)
     {
         // Small pulse height hits should not be considered?
         if (hitCandidate.hitHeight > fMinHitHeight)
         {
             // Check condition that we have a new grouping
             if (hitCandidate.startTick > lastStopTick + fNumInterveningTicks && !groupedHitVec.empty())
             {
                 mergedHitsVec.emplace_back(groupedHitVec);
             
                 groupedHitVec.clear();
             }
 
             // Add the current hit to the current group
             groupedHitVec.emplace_back(hitCandidate);
         
             lastStopTick = hitCandidate.stopTick;
         }
     }
     
     // Check end condition
     if (!groupedHitVec.empty()) mergedHitsVec.emplace_back(groupedHitVec);
     
     return;
 }