CornerFinderAlg.cxx

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//
// CornerFinderAlg class
//
// wketchum@fnal.gov
//
// CornerFinder is meant to use image-processing techniques (mainly Harris-Stephens
// corner-finding) to find "corners" using the information from calibrated wires.
//
//  Conversion_algorithm options:
//     standard --- basically a copy of the calibrated wires
//     skeleton --- a thinned copy of the calibrated wires
//     binary   --- ticks above threshold get assigned a value 10*threshold, everything else = threshold
//     function --- apply a function (like a double-Gaussian) to a neighborhood around each tick
//
//  Derivative options:
//     Sobel --- apply a Sobel mask (neighborhood of 1 or 2 supported)
//     local --- take slope from immediately neighboring bins (neighborhood of 1 supported)
//
//  Derivative_BlurFunc options:  none. You're stuck with a double gaussian.
//
//  CornerScore_algorithm options:
//     Noble  --- determinant / (trace + Noble_epsilon)
//     Harris --- determinant - (trace)^2 * Harris_kappa

#include "larreco/RecoAlg/CornerFinderAlg.h"

#include "fhiclcpp/ParameterSet.h"
#include "messagefacility/MessageLogger/MessageLogger.h"

#include "larcorealg/Geometry/CryostatGeo.h"
#include "larcorealg/Geometry/GeometryCore.h"
#include "larcorealg/Geometry/PlaneGeo.h"
#include "larcorealg/Geometry/TPCGeo.h"
#include "larcorealg/Geometry/WireReadoutGeom.h"

// NOTE: In the .h file I assumed this would belong in the cluster class....if
// we decide otherwise we will need to search and replace for this

//-----------------------------------------------------------------------------
corner::CornerFinderAlg::CornerFinderAlg(fhicl::ParameterSet const& pset)
  : fCalDataModuleLabel{pset.get<std::string>("CalDataModuleLabel")}
  , fConversion_algorithm{pset.get<std::string>("Conversion_algorithm")}
  , fConversion_func{pset.get<std::string>("Conversion_function")}
  , fTrimming_threshold{pset.get<float>("Trimming_threshold")}
  , fTrimming_totalThreshold{pset.get<double>("Trimming_totalThreshold")}
  , fConversion_func_neighborhood{pset.get<int>("Conversion_func_neighborhood")}
  , fConversion_threshold{pset.get<float>("Conversion_threshold")}
  , fConversion_bins_per_input_x{pset.get<int>("Conversion_bins_per_input_x")}
  , fConversion_bins_per_input_y{pset.get<int>("Conversion_bins_per_input_y")}
  , fDerivative_method{pset.get<std::string>("Derivative_method")}
  , fDerivative_neighborhood{pset.get<int>("Derivative_neighborhood")}
  , fDerivative_BlurFunc{pset.get<std::string>("Derivative_BlurFunc")}
  , fDerivative_BlurNeighborhood{pset.get<int>("Derivative_BlurNeighborhood")}
  , fCornerScore_neighborhood{pset.get<int>("CornerScore_neighborhood")}
  , fCornerScore_algorithm{pset.get<std::string>("CornerScore_algorithm")}
  , fCornerScore_Noble_epsilon{pset.get<float>("CornerScore_Noble_epsilon")}
  , fCornerScore_Harris_kappa{pset.get<float>("CornerScore_Harris_kappa")}
  , fMaxSuppress_neighborhood{pset.get<int>("MaxSuppress_neighborhood")}
  , fMaxSuppress_threshold{pset.get<int>("MaxSuppress_threshold")}
  , fIntegral_bin_threshold{pset.get<float>("Integral_bin_threshold")}
  , fIntegral_fraction_threshold{pset.get<float>("Integral_fraction_threshold")}
{
  fTrimming_buffer = std::max({fConversion_func_neighborhood,
                               fDerivative_neighborhood,
                               fDerivative_BlurNeighborhood,
                               fCornerScore_neighborhood,
                               fMaxSuppress_neighborhood});
}

//-----------------------------------------------------------------------------
void corner::CornerFinderAlg::InitializeGeometry(geo::WireReadoutGeom const& wireReadoutGeom)
{
  // Reset containers
  WireData_histos.clear();
  WireData_histos_ProjectionX.clear();
  WireData_histos_ProjectionY.clear();
  WireData_IDs.clear();

  WireData_trimmed_histos.clear();

  // set the sizes of the WireData_histos and WireData_IDs
  constexpr geo::TPCID tpcid{0, 0};
  unsigned int nPlanes = wireReadoutGeom.Nplanes(tpcid);
  WireData_histos.resize(nPlanes);
  WireData_histos_ProjectionX.resize(nPlanes);
  WireData_histos_ProjectionY.resize(nPlanes);

  /* For now, we need something to associate each wire in the histogram with a wire_id.
     This is not a beautiful way of handling this, but for now it should work. */
  WireData_IDs.resize(nPlanes);
  for (auto const& planeid : wireReadoutGeom.Iterate<geo::PlaneID>(tpcid))
    WireData_IDs[planeid.Plane].resize(wireReadoutGeom.Nwires(planeid));

  WireData_trimmed_histos.resize(0);
}

//-----------------------------------------------------------------------------
void corner::CornerFinderAlg::GrabWires(std::vector<recob::Wire> const& wireVec,
                                        geo::WireReadoutGeom const& wireReadoutGeom)
{
  InitializeGeometry(wireReadoutGeom);

  const unsigned int nTimeTicks = wireVec.at(0).NSignal();

  // Initialize the histograms.
  // All of this should eventually be changed to not need to use histograms...
  constexpr geo::TPCID tpcid{0, 0};
  for (auto const& planeid : wireReadoutGeom.Iterate<geo::PlaneID>(tpcid)) {
    auto const i_plane = planeid.Plane;

    std::stringstream ss_tmp_name, ss_tmp_title;
    ss_tmp_name << "h_WireData_" << i_plane;
    ss_tmp_title << fCalDataModuleLabel << " wire data for plane " << i_plane
                 << ";Wire Number;Time Tick";

    auto const num_wires = wireReadoutGeom.Nwires(planeid);
    if (static_cast<unsigned int>(WireData_histos[i_plane].GetNbinsX()) == num_wires) {
      WireData_histos[i_plane].Reset();
      WireData_histos[i_plane].SetName(ss_tmp_name.str().c_str());
      WireData_histos[i_plane].SetTitle(ss_tmp_title.str().c_str());
    }
    else
      WireData_histos[i_plane] = TH2F(ss_tmp_name.str().c_str(),
                                      ss_tmp_title.str().c_str(),
                                      num_wires,
                                      0,
                                      num_wires,
                                      nTimeTicks,
                                      0,
                                      nTimeTicks);
  }

  /* Now do the loop over the wires. */
  for (auto const& wire : wireVec) {
    std::vector<geo::WireID> possible_wireIDs = wireReadoutGeom.ChannelToWire(wire.Channel());
    geo::WireID this_wireID;
    try {
      this_wireID = possible_wireIDs.at(0);
    }
    catch (cet::exception& excep) {
      // FIXME (KJK): Why does this loop continue when an exception is caught and we're
      //              supposed to "bail out"?
      mf::LogError("CornerFinderAlg") << "Bail out! No Possible Wires!\n";
    }

    unsigned int i_plane = this_wireID.Plane;
    unsigned int i_wire = this_wireID.Wire;

    WireData_IDs.at(i_plane).at(i_wire) = this_wireID;

    for (unsigned int i_time = 0; i_time < nTimeTicks; i_time++) {
      WireData_histos.at(i_plane).SetBinContent(i_wire, i_time, wire.Signal().at(i_time));
    } //<---End time loop

  } //<-- End loop over wires

  for (unsigned int i_plane = 0; i_plane < wireReadoutGeom.Nplanes(); i_plane++) {
    WireData_histos_ProjectionX.at(i_plane) = *(WireData_histos.at(i_plane).ProjectionX());
    WireData_histos_ProjectionY.at(i_plane) = *(WireData_histos.at(i_plane).ProjectionY());
  }
}

//-----------------------------------------------------------------------------------
// This gives us a vecotr of EndPoint2D objects that correspond to possible corners
void corner::CornerFinderAlg::get_feature_points(std::vector<recob::EndPoint2D>& corner_vector,
                                                 geo::WireReadoutGeom const& wireReadoutGeom)
{
  for (auto const& pid : wireReadoutGeom.Iterate<geo::PlaneID>()) {
    attach_feature_points(WireData_histos.at(pid.Plane),
                          WireData_IDs.at(pid.Plane),
                          wireReadoutGeom.Plane(pid).View(),
                          corner_vector);
  }
}

//-----------------------------------------------------------------------------------
// This gives us a vector of EndPoint2D objects that correspond to possible corners, but quickly!
void corner::CornerFinderAlg::get_feature_points_fast(std::vector<recob::EndPoint2D>& corner_vector,
                                                      geo::GeometryCore const& my_geometry,
                                                      geo::WireReadoutGeom const& wireReadoutGeom)
{
  create_smaller_histos(wireReadoutGeom);

  for (auto const& cryostat : my_geometry.Iterate<geo::CryostatGeo>()) {
    for (unsigned int tpc = 0; tpc < cryostat.NTPC(); ++tpc) {
      for (size_t histos = 0; histos != WireData_trimmed_histos.size(); histos++) {

        unsigned int plane = std::get<0>(WireData_trimmed_histos.at(histos));
        int startx = std::get<2>(WireData_trimmed_histos.at(histos));
        int starty = std::get<3>(WireData_trimmed_histos.at(histos));

        MF_LOG_DEBUG("CornerFinderAlg") << "Doing histogram " << histos << ", of plane " << plane
                                        << " with start points " << startx << " " << starty;

        attach_feature_points(std::get<1>(WireData_trimmed_histos.at(histos)),
                              WireData_IDs.at(plane),
                              wireReadoutGeom.Plane({cryostat.ID().Cryostat, tpc, plane}).View(),
                              corner_vector,
                              startx,
                              starty);

        MF_LOG_DEBUG("CornerFinderAlg") << "Total feature points now is " << corner_vector.size();
      }
    }
  }
}

//-----------------------------------------------------------------------------------
// This gives us a vector of EndPoint2D objects that correspond to possible corners
// Uses line integral score as corner strength
void corner::CornerFinderAlg::get_feature_points_LineIntegralScore(
  std::vector<recob::EndPoint2D>& corner_vector,
  geo::WireReadoutGeom const& wireReadoutGeom)
{
  for (auto const& pid : wireReadoutGeom.Iterate<geo::PlaneID>()) {
    attach_feature_points_LineIntegralScore(WireData_histos.at(pid.Plane),
                                            WireData_IDs.at(pid.Plane),
                                            wireReadoutGeom.Plane(pid).View(),
                                            corner_vector);
  }
}

namespace {
  struct compare_to_value {
    compare_to_value(int b) { this->b = b; }
    bool operator()(int i, int j) const { return std::abs(b - i) < std::abs(b - j); }
    int b;
  };
}

//-----------------------------------------------------------------------------
// This looks for areas of the wires that are non-noise, to speed up evaluation
void corner::CornerFinderAlg::create_smaller_histos(geo::WireReadoutGeom const& wireReadoutGeom)
{
  for (auto const& pid : wireReadoutGeom.Iterate<geo::PlaneID>()) {

    MF_LOG_DEBUG("CornerFinderAlg") << "Working plane " << pid.Plane << ".";

    int x_bins = WireData_histos_ProjectionX.at(pid.Plane).GetNbinsX();
    int y_bins = WireData_histos_ProjectionY.at(pid.Plane).GetNbinsX();

    std::vector<int> cut_points_x{0};
    std::vector<int> cut_points_y{0};

    for (int ix = 1; ix <= x_bins; ix++) {

      float this_value = WireData_histos_ProjectionX.at(pid.Plane).GetBinContent(ix);

      if (ix < fTrimming_buffer || ix > (x_bins - fTrimming_buffer)) continue;

      int jx = ix - fTrimming_buffer;
      while (this_value < fTrimming_threshold) {
        if (jx == ix + fTrimming_buffer) break;
        this_value = WireData_histos_ProjectionX.at(pid.Plane).GetBinContent(jx);
        jx++;
      }
      if (this_value < fTrimming_threshold) { cut_points_x.push_back(ix); }
    }

    for (int iy = 1; iy <= y_bins; iy++) {

      float this_value = WireData_histos_ProjectionY.at(pid.Plane).GetBinContent(iy);

      if (iy < fTrimming_buffer || iy > (y_bins - fTrimming_buffer)) continue;

      int jy = iy - fTrimming_buffer;
      while (this_value < fTrimming_threshold) {
        if (jy == iy + fTrimming_buffer) break;
        this_value = WireData_histos_ProjectionY.at(pid.Plane).GetBinContent(jy);
        jy++;
      }
      if (this_value < fTrimming_threshold) { cut_points_y.push_back(iy); }
    }

    MF_LOG_DEBUG("CornerFinderAlg")
      << "We have a total of " << cut_points_x.size() << " x cut points."
      << "\nWe have a total of " << cut_points_y.size() << " y cut points.";

    std::vector<int> x_low{1};
    std::vector<int> x_high{x_bins};
    std::vector<int> y_low{1};
    std::vector<int> y_high{y_bins};
    bool x_change = true;
    bool y_change = true;
    while (x_change || y_change) {

      x_change = false;
      y_change = false;

      size_t current_size = x_low.size();

      for (size_t il = 0; il < current_size; il++) {

        int comp_value = (x_high.at(il) + x_low.at(il)) / 2;
        std::sort(cut_points_x.begin(), cut_points_x.end(), compare_to_value(comp_value));

        if (cut_points_x.at(0) <= x_low.at(il) || cut_points_x.at(0) >= x_high.at(il)) continue;

        double integral_low = WireData_histos.at(pid.Plane).Integral(
          x_low.at(il), cut_points_x.at(0), y_low.at(il), y_high.at(il));
        double integral_high = WireData_histos.at(pid.Plane).Integral(
          cut_points_x.at(0), x_high.at(il), y_low.at(il), y_high.at(il));
        if (integral_low > fTrimming_totalThreshold && integral_high > fTrimming_totalThreshold) {
          x_low.push_back(cut_points_x.at(0));
          x_high.push_back(x_high.at(il));
          y_low.push_back(y_low.at(il));
          y_high.push_back(y_high.at(il));

          x_high[il] = cut_points_x.at(0);
          x_change = true;
        }
        else if (integral_low > fTrimming_totalThreshold &&
                 integral_high < fTrimming_totalThreshold) {
          x_high[il] = cut_points_x.at(0);
          x_change = true;
        }
        else if (integral_low < fTrimming_totalThreshold &&
                 integral_high > fTrimming_totalThreshold) {
          x_low[il] = cut_points_x.at(0);
          x_change = true;
        }
      }

      current_size = x_low.size();

      for (size_t il = 0; il < current_size; il++) {

        int comp_value = (y_high.at(il) - y_low.at(il)) / 2;
        std::sort(cut_points_y.begin(), cut_points_y.end(), compare_to_value(comp_value));

        if (cut_points_y.at(0) <= y_low.at(il) || cut_points_y.at(0) >= y_high.at(il)) continue;

        double integral_low = WireData_histos.at(pid.Plane).Integral(
          x_low.at(il), x_high.at(il), y_low.at(il), cut_points_y.at(0));
        double integral_high = WireData_histos.at(pid.Plane).Integral(
          x_low.at(il), x_high.at(il), cut_points_y.at(0), y_high.at(il));
        if (integral_low > fTrimming_totalThreshold && integral_high > fTrimming_totalThreshold) {
          y_low.push_back(cut_points_y.at(0));
          y_high.push_back(y_high.at(il));
          x_low.push_back(x_low.at(il));
          x_high.push_back(x_high.at(il));

          y_high[il] = cut_points_y.at(0);
          y_change = true;
        }
        else if (integral_low > fTrimming_totalThreshold &&
                 integral_high < fTrimming_totalThreshold) {
          y_high[il] = cut_points_y.at(0);
          y_change = true;
        }
        else if (integral_low < fTrimming_totalThreshold &&
                 integral_high > fTrimming_totalThreshold) {
          y_low[il] = cut_points_y.at(0);
          y_change = true;
        }
      }
    }

    MF_LOG_DEBUG("CornerFinderAlg") << "First point in x is " << cut_points_x.at(0);

    std::sort(cut_points_x.begin(), cut_points_x.end(), compare_to_value(x_bins / 2));

    MF_LOG_DEBUG("CornerFinderAlg") << "Now the first point in x is " << cut_points_x.at(0);

    MF_LOG_DEBUG("CornerFinderAlg") << "First point in y is " << cut_points_y.at(0);

    std::sort(cut_points_y.begin(), cut_points_y.end(), compare_to_value(y_bins / 2));

    MF_LOG_DEBUG("CornerFinderAlg") << "Now the first point in y is " << cut_points_y.at(0);

    MF_LOG_DEBUG("CornerFinderAlg")
      << "\nIntegral on the SW side is "
      << WireData_histos.at(pid.Plane).Integral(1, cut_points_x.at(0), 1, cut_points_y.at(0))
      << "\nIntegral on the SE side is "
      << WireData_histos.at(pid.Plane).Integral(cut_points_x.at(0), x_bins, 1, cut_points_y.at(0))
      << "\nIntegral on the NW side is "
      << WireData_histos.at(pid.Plane).Integral(1, cut_points_x.at(0), cut_points_y.at(0), y_bins)
      << "\nIntegral on the NE side is "
      << WireData_histos.at(pid.Plane).Integral(
           cut_points_x.at(0), x_bins, cut_points_y.at(0), y_bins);

    for (size_t il = 0; il < x_low.size(); il++) {

      std::stringstream h_name;
      h_name << "h_" << pid.Cryostat << "_" << pid.TPC << "_" << pid.Plane << "_sub" << il;
      TH2F h_tmp((h_name.str()).c_str(),
                 "",
                 x_high.at(il) - x_low.at(il) + 1,
                 x_low.at(il),
                 x_high.at(il),
                 y_high.at(il) - y_low.at(il) + 1,
                 y_low.at(il),
                 y_high.at(il));

      for (int ix = 1; ix <= (x_high.at(il) - x_low.at(il) + 1); ix++) {
        for (int iy = 1; iy <= (y_high.at(il) - y_low.at(il) + 1); iy++) {
          h_tmp.SetBinContent(ix,
                              iy,
                              WireData_histos.at(pid.Plane).GetBinContent(x_low.at(il) + (ix - 1),
                                                                          y_low.at(il) + (iy - 1)));
        }
      }

      WireData_trimmed_histos.push_back(
        std::make_tuple(pid.Plane, h_tmp, x_low.at(il) - 1, y_low.at(il) - 1));
    }

  } // end loop over PlaneIDs
}

//-----------------------------------------------------------------------------
// This puts on all the feature points in a given view, using a given data histogram
void corner::CornerFinderAlg::attach_feature_points(TH2F const& h_wire_data,
                                                    std::vector<geo::WireID> const& wireIDs,
                                                    geo::View_t view,
                                                    std::vector<recob::EndPoint2D>& corner_vector,
                                                    int startx,
                                                    int starty)
{
  const int x_bins = h_wire_data.GetNbinsX();
  const float x_min = h_wire_data.GetXaxis()->GetBinLowEdge(1);
  const float x_max = h_wire_data.GetXaxis()->GetBinUpEdge(x_bins);

  const int y_bins = h_wire_data.GetNbinsY();
  const float y_min = h_wire_data.GetYaxis()->GetBinLowEdge(1);
  const float y_max = h_wire_data.GetYaxis()->GetBinUpEdge(y_bins);

  const int converted_y_bins = y_bins / fConversion_bins_per_input_y;
  const int converted_x_bins = x_bins / fConversion_bins_per_input_x;

  std::stringstream conversion_name;
  conversion_name << "h_conversion_" << view << "_" << run_number << "_" << event_number;
  std::stringstream dx_name;
  dx_name << "h_derivative_x_" << view << "_" << run_number << "_" << event_number;
  std::stringstream dy_name;
  dy_name << "h_derivative_y_" << view << "_" << run_number << "_" << event_number;
  std::stringstream cornerScore_name;
  cornerScore_name << "h_cornerScore_" << view << "_" << run_number << "_" << event_number;
  std::stringstream maxSuppress_name;
  maxSuppress_name << "h_maxSuppress_" << view << "_" << run_number << "_" << event_number;

  TH2F conversion_histo(conversion_name.str().c_str(),
                        "Image Conversion Histogram",
                        converted_x_bins,
                        x_min,
                        x_max,
                        converted_y_bins,
                        y_min,
                        y_max);

  TH2F derivativeX_histo(dx_name.str().c_str(),
                         "Partial Derivatives (x)",
                         converted_x_bins,
                         x_min,
                         x_max,
                         converted_y_bins,
                         y_min,
                         y_max);

  TH2F derivativeY_histo(dy_name.str().c_str(),
                         "Partial Derivatives (y)",
                         converted_x_bins,
                         x_min,
                         x_max,
                         converted_y_bins,
                         y_min,
                         y_max);

  TH2D cornerScore_histo(cornerScore_name.str().c_str(),
                         "Corner Score",
                         converted_x_bins,
                         x_min,
                         x_max,
                         converted_y_bins,
                         y_min,
                         y_max);

  TH2D maxSuppress_histo(maxSuppress_name.str().c_str(),
                         "Corner Points (Maximum Suppressed)",
                         converted_x_bins,
                         x_min,
                         x_max,
                         converted_y_bins,
                         y_min,
                         y_max);

  create_image_histo(h_wire_data, conversion_histo);
  create_derivative_histograms(conversion_histo, derivativeX_histo, derivativeY_histo);
  create_cornerScore_histogram(derivativeX_histo, derivativeY_histo, cornerScore_histo);
  corner_vector = perform_maximum_suppression(
    cornerScore_histo, wireIDs, view, maxSuppress_histo, startx, starty);
}

//-----------------------------------------------------------------------------
// This puts on all the feature points in a given view, using a given data histogram
void corner::CornerFinderAlg::attach_feature_points_LineIntegralScore(
  TH2F const& h_wire_data,
  std::vector<geo::WireID> const& wireIDs,
  geo::View_t view,
  std::vector<recob::EndPoint2D>& corner_vector)
{
  const int x_bins = h_wire_data.GetNbinsX();
  const float x_min = h_wire_data.GetXaxis()->GetBinLowEdge(1);
  const float x_max = h_wire_data.GetXaxis()->GetBinUpEdge(x_bins);

  const int y_bins = h_wire_data.GetNbinsY();
  const float y_min = h_wire_data.GetYaxis()->GetBinLowEdge(1);
  const float y_max = h_wire_data.GetYaxis()->GetBinUpEdge(y_bins);

  const int converted_y_bins = y_bins / fConversion_bins_per_input_y;
  const int converted_x_bins = x_bins / fConversion_bins_per_input_x;

  std::stringstream conversion_name;
  conversion_name << "h_conversion_" << view << "_" << run_number << "_" << event_number;
  std::stringstream dx_name;
  dx_name << "h_derivative_x_" << view << "_" << run_number << "_" << event_number;
  std::stringstream dy_name;
  dy_name << "h_derivative_y_" << view << "_" << run_number << "_" << event_number;
  std::stringstream cornerScore_name;
  cornerScore_name << "h_cornerScore_" << view << "_" << run_number << "_" << event_number;
  std::stringstream maxSuppress_name;
  maxSuppress_name << "h_maxSuppress_" << view << "_" << run_number << "_" << event_number;

  TH2F h_conversion(conversion_name.str().c_str(),
                    "Image Conversion Histogram",
                    converted_x_bins,
                    x_min,
                    x_max,
                    converted_y_bins,
                    y_min,
                    y_max);
  TH2F h_derivative_x(dx_name.str().c_str(),
                      "Partial Derivatives (x)",
                      converted_x_bins,
                      x_min,
                      x_max,
                      converted_y_bins,
                      y_min,
                      y_max);
  TH2F h_derivative_y(dy_name.str().c_str(),
                      "Partial Derivatives (y)",
                      converted_x_bins,
                      x_min,
                      x_max,
                      converted_y_bins,
                      y_min,
                      y_max);
  TH2D h_cornerScore(cornerScore_name.str().c_str(),
                     "Feature Point Corner Score",
                     converted_x_bins,
                     x_min,
                     x_max,
                     converted_y_bins,
                     y_min,
                     y_max);
  TH2D h_maxSuppress(maxSuppress_name.str().c_str(),
                     "Corner Points (Maximum Suppressed)",
                     converted_x_bins,
                     x_min,
                     x_max,
                     converted_y_bins,
                     y_min,
                     y_max);

  create_image_histo(h_wire_data, h_conversion);
  create_derivative_histograms(h_conversion, h_derivative_x, h_derivative_y);
  create_cornerScore_histogram(h_derivative_x, h_derivative_y, h_cornerScore);

  auto corner_vector_tmp = perform_maximum_suppression(h_cornerScore, wireIDs, view, h_maxSuppress);

  std::stringstream LI_name;
  LI_name << "h_lineIntegralScore_" << view << "_" << run_number << "_" << event_number;
  TH2F h_lineIntegralScore(
    LI_name.str().c_str(), "Line Integral Score", x_bins, x_min, x_max, y_bins, y_min, y_max);
  calculate_line_integral_score(h_wire_data, corner_vector_tmp, corner_vector, h_lineIntegralScore);
}

//-----------------------------------------------------------------------------
// Convert to pixel
void corner::CornerFinderAlg::create_image_histo(TH2F const& h_wire_data, TH2F& h_conversion) const
{
  double temp_integral = 0;

  const TF2 fConversion_TF2("fConversion_func", fConversion_func.c_str(), -20, 20, -20, 20);

  for (int ix = 1; ix <= h_conversion.GetNbinsX(); ix++) {
    for (int iy = 1; iy <= h_conversion.GetNbinsY(); iy++) {

      temp_integral = h_wire_data.Integral(ix, ix, iy, iy);

      if (temp_integral > fConversion_threshold) {

        if (fConversion_algorithm.compare("binary") == 0)
          h_conversion.SetBinContent(ix, iy, 10 * fConversion_threshold);
        else if (fConversion_algorithm.compare("standard") == 0)
          h_conversion.SetBinContent(ix, iy, temp_integral);

        else if (fConversion_algorithm.compare("function") == 0) {

          temp_integral = 0;
          for (int jx = ix - fConversion_func_neighborhood;
               jx <= ix + fConversion_func_neighborhood;
               jx++) {
            for (int jy = iy - fConversion_func_neighborhood;
                 jy <= iy + fConversion_func_neighborhood;
                 jy++) {
              temp_integral +=
                h_wire_data.GetBinContent(jx, jy) * fConversion_TF2.Eval(ix - jx, iy - jy);
            }
          }
          h_conversion.SetBinContent(ix, iy, temp_integral);
        }

        else if (fConversion_algorithm.compare("skeleton") == 0) {

          if ((temp_integral > h_wire_data.GetBinContent(ix - 1, iy) &&
               temp_integral > h_wire_data.GetBinContent(ix + 1, iy)) ||
              (temp_integral > h_wire_data.GetBinContent(ix, iy - 1) &&
               temp_integral > h_wire_data.GetBinContent(ix, iy + 1)))
            h_conversion.SetBinContent(ix, iy, temp_integral);
          else
            h_conversion.SetBinContent(ix, iy, fConversion_threshold);
        }
        else if (fConversion_algorithm.compare("sk_bin") == 0) {

          if ((temp_integral > h_wire_data.GetBinContent(ix - 1, iy) &&
               temp_integral > h_wire_data.GetBinContent(ix + 1, iy)) ||
              (temp_integral > h_wire_data.GetBinContent(ix, iy - 1) &&
               temp_integral > h_wire_data.GetBinContent(ix, iy + 1)))
            h_conversion.SetBinContent(ix, iy, 10 * fConversion_threshold);
          else
            h_conversion.SetBinContent(ix, iy, fConversion_threshold);
        }
        else
          h_conversion.SetBinContent(ix, iy, temp_integral);
      }

      else
        h_conversion.SetBinContent(ix, iy, fConversion_threshold);
    }
  }
}

//-----------------------------------------------------------------------------
// Derivative

void corner::CornerFinderAlg::create_derivative_histograms(TH2F const& h_conversion,
                                                           TH2F& h_derivative_x,
                                                           TH2F& h_derivative_y)
{
  const int x_bins = h_conversion.GetNbinsX();
  const int y_bins = h_conversion.GetNbinsY();

  for (int iy = 1 + fDerivative_neighborhood; iy <= (y_bins - fDerivative_neighborhood); iy++) {
    for (int ix = 1 + fDerivative_neighborhood; ix <= (x_bins - fDerivative_neighborhood); ix++) {

      if (fDerivative_method.compare("Sobel") == 0) {

        if (fDerivative_neighborhood == 1) {
          h_derivative_x.SetBinContent(ix,
                                       iy,
                                       0.5 * (h_conversion.GetBinContent(ix + 1, iy) -
                                              h_conversion.GetBinContent(ix - 1, iy)) +
                                         0.25 * (h_conversion.GetBinContent(ix + 1, iy + 1) -
                                                 h_conversion.GetBinContent(ix - 1, iy + 1)) +
                                         0.25 * (h_conversion.GetBinContent(ix + 1, iy - 1) -
                                                 h_conversion.GetBinContent(ix - 1, iy - 1)));
          h_derivative_y.SetBinContent(ix,
                                       iy,
                                       0.5 * (h_conversion.GetBinContent(ix, iy + 1) -
                                              h_conversion.GetBinContent(ix, iy - 1)) +
                                         0.25 * (h_conversion.GetBinContent(ix - 1, iy + 1) -
                                                 h_conversion.GetBinContent(ix - 1, iy - 1)) +
                                         0.25 * (h_conversion.GetBinContent(ix + 1, iy + 1) -
                                                 h_conversion.GetBinContent(ix + 1, iy - 1)));
        }
        else if (fDerivative_neighborhood == 2) {
          h_derivative_x.SetBinContent(
            ix,
            iy,
            12 * (h_conversion.GetBinContent(ix + 1, iy) - h_conversion.GetBinContent(ix - 1, iy)) +
              8 * (h_conversion.GetBinContent(ix + 1, iy + 1) -
                   h_conversion.GetBinContent(ix - 1, iy + 1)) +
              8 * (h_conversion.GetBinContent(ix + 1, iy - 1) -
                   h_conversion.GetBinContent(ix - 1, iy - 1)) +
              2 * (h_conversion.GetBinContent(ix + 1, iy + 2) -
                   h_conversion.GetBinContent(ix - 1, iy + 2)) +
              2 * (h_conversion.GetBinContent(ix + 1, iy - 2) -
                   h_conversion.GetBinContent(ix - 1, iy - 2)) +
              6 *
                (h_conversion.GetBinContent(ix + 2, iy) - h_conversion.GetBinContent(ix - 2, iy)) +
              4 * (h_conversion.GetBinContent(ix + 2, iy + 1) -
                   h_conversion.GetBinContent(ix - 2, iy + 1)) +
              4 * (h_conversion.GetBinContent(ix + 2, iy - 1) -
                   h_conversion.GetBinContent(ix - 2, iy - 1)) +
              1 * (h_conversion.GetBinContent(ix + 2, iy + 2) -
                   h_conversion.GetBinContent(ix - 2, iy + 2)) +
              1 * (h_conversion.GetBinContent(ix + 2, iy - 2) -
                   h_conversion.GetBinContent(ix - 2, iy - 2)));
          h_derivative_y.SetBinContent(
            ix,
            iy,
            12 * (h_conversion.GetBinContent(ix, iy + 1) - h_conversion.GetBinContent(ix, iy - 1)) +
              8 * (h_conversion.GetBinContent(ix - 1, iy + 1) -
                   h_conversion.GetBinContent(ix - 1, iy - 1)) +
              8 * (h_conversion.GetBinContent(ix + 1, iy + 1) -
                   h_conversion.GetBinContent(ix + 1, iy - 1)) +
              2 * (h_conversion.GetBinContent(ix - 2, iy + 1) -
                   h_conversion.GetBinContent(ix - 2, iy - 1)) +
              2 * (h_conversion.GetBinContent(ix + 2, iy + 1) -
                   h_conversion.GetBinContent(ix + 2, iy - 1)) +
              6 *
                (h_conversion.GetBinContent(ix, iy + 2) - h_conversion.GetBinContent(ix, iy - 2)) +
              4 * (h_conversion.GetBinContent(ix - 1, iy + 2) -
                   h_conversion.GetBinContent(ix - 1, iy - 2)) +
              4 * (h_conversion.GetBinContent(ix + 1, iy + 2) -
                   h_conversion.GetBinContent(ix + 1, iy - 2)) +
              1 * (h_conversion.GetBinContent(ix - 2, iy + 2) -
                   h_conversion.GetBinContent(ix - 2, iy - 2)) +
              1 * (h_conversion.GetBinContent(ix + 2, iy + 2) -
                   h_conversion.GetBinContent(ix + 2, iy - 2)));
        }
        else {
          mf::LogError("CornerFinderAlg")
            << "Sobel derivative not supported for neighborhoods > 2.";
          return;
        }

      } //end if Sobel

      else if (fDerivative_method.compare("local") == 0) {

        if (fDerivative_neighborhood == 1) {
          h_derivative_x.SetBinContent(
            ix,
            iy,
            (h_conversion.GetBinContent(ix + 1, iy) - h_conversion.GetBinContent(ix - 1, iy)));
          h_derivative_y.SetBinContent(
            ix,
            iy,
            (h_conversion.GetBinContent(ix, iy + 1) - h_conversion.GetBinContent(ix, iy - 1)));
        }
        else {
          mf::LogError("CornerFinderAlg")
            << "Local derivative not yet supported for neighborhoods > 1.";
          return;
        }
      } //end if local

      else {
        mf::LogError("CornerFinderAlg") << "Bad derivative algorithm! " << fDerivative_method;
        return;
      }
    }
  }

  //this is just a double Gaussian
  float func_blur[11][11];
  func_blur[0][0] = 0.000000;
  func_blur[0][1] = 0.000000;
  func_blur[0][2] = 0.000000;
  func_blur[0][3] = 0.000001;
  func_blur[0][4] = 0.000002;
  func_blur[0][5] = 0.000004;
  func_blur[0][6] = 0.000002;
  func_blur[0][7] = 0.000001;
  func_blur[0][8] = 0.000000;
  func_blur[0][9] = 0.000000;
  func_blur[0][10] = 0.000000;
  func_blur[1][0] = 0.000000;
  func_blur[1][1] = 0.000000;
  func_blur[1][2] = 0.000004;
  func_blur[1][3] = 0.000045;
  func_blur[1][4] = 0.000203;
  func_blur[1][5] = 0.000335;
  func_blur[1][6] = 0.000203;
  func_blur[1][7] = 0.000045;
  func_blur[1][8] = 0.000004;
  func_blur[1][9] = 0.000000;
  func_blur[1][10] = 0.000000;
  func_blur[2][0] = 0.000000;
  func_blur[2][1] = 0.000004;
  func_blur[2][2] = 0.000123;
  func_blur[2][3] = 0.001503;
  func_blur[2][4] = 0.006738;
  func_blur[2][5] = 0.011109;
  func_blur[2][6] = 0.006738;
  func_blur[2][7] = 0.001503;
  func_blur[2][8] = 0.000123;
  func_blur[2][9] = 0.000004;
  func_blur[2][10] = 0.000000;
  func_blur[3][0] = 0.000001;
  func_blur[3][1] = 0.000045;
  func_blur[3][2] = 0.001503;
  func_blur[3][3] = 0.018316;
  func_blur[3][4] = 0.082085;
  func_blur[3][5] = 0.135335;
  func_blur[3][6] = 0.082085;
  func_blur[3][7] = 0.018316;
  func_blur[3][8] = 0.001503;
  func_blur[3][9] = 0.000045;
  func_blur[3][10] = 0.000001;
  func_blur[4][0] = 0.000002;
  func_blur[4][1] = 0.000203;
  func_blur[4][2] = 0.006738;
  func_blur[4][3] = 0.082085;
  func_blur[4][4] = 0.367879;
  func_blur[4][5] = 0.606531;
  func_blur[4][6] = 0.367879;
  func_blur[4][7] = 0.082085;
  func_blur[4][8] = 0.006738;
  func_blur[4][9] = 0.000203;
  func_blur[4][10] = 0.000002;
  func_blur[5][0] = 0.000004;
  func_blur[5][1] = 0.000335;
  func_blur[5][2] = 0.011109;
  func_blur[5][3] = 0.135335;
  func_blur[5][4] = 0.606531;
  func_blur[5][5] = 1.000000;
  func_blur[5][6] = 0.606531;
  func_blur[5][7] = 0.135335;
  func_blur[5][8] = 0.011109;
  func_blur[5][9] = 0.000335;
  func_blur[5][10] = 0.000004;
  func_blur[6][0] = 0.000002;
  func_blur[6][1] = 0.000203;
  func_blur[6][2] = 0.006738;
  func_blur[6][3] = 0.082085;
  func_blur[6][4] = 0.367879;
  func_blur[6][5] = 0.606531;
  func_blur[6][6] = 0.367879;
  func_blur[6][7] = 0.082085;
  func_blur[6][8] = 0.006738;
  func_blur[6][9] = 0.000203;
  func_blur[6][10] = 0.000002;
  func_blur[7][0] = 0.000001;
  func_blur[7][1] = 0.000045;
  func_blur[7][2] = 0.001503;
  func_blur[7][3] = 0.018316;
  func_blur[7][4] = 0.082085;
  func_blur[7][5] = 0.135335;
  func_blur[7][6] = 0.082085;
  func_blur[7][7] = 0.018316;
  func_blur[7][8] = 0.001503;
  func_blur[7][9] = 0.000045;
  func_blur[7][10] = 0.000001;
  func_blur[8][0] = 0.000000;
  func_blur[8][1] = 0.000004;
  func_blur[8][2] = 0.000123;
  func_blur[8][3] = 0.001503;
  func_blur[8][4] = 0.006738;
  func_blur[8][5] = 0.011109;
  func_blur[8][6] = 0.006738;
  func_blur[8][7] = 0.001503;
  func_blur[8][8] = 0.000123;
  func_blur[8][9] = 0.000004;
  func_blur[8][10] = 0.000000;
  func_blur[9][0] = 0.000000;
  func_blur[9][1] = 0.000000;
  func_blur[9][2] = 0.000004;
  func_blur[9][3] = 0.000045;
  func_blur[9][4] = 0.000203;
  func_blur[9][5] = 0.000335;
  func_blur[9][6] = 0.000203;
  func_blur[9][7] = 0.000045;
  func_blur[9][8] = 0.000004;
  func_blur[9][9] = 0.000000;
  func_blur[9][10] = 0.000000;
  func_blur[10][0] = 0.000000;
  func_blur[10][1] = 0.000000;
  func_blur[10][2] = 0.000000;
  func_blur[10][3] = 0.000001;
  func_blur[10][4] = 0.000002;
  func_blur[10][5] = 0.000004;
  func_blur[10][6] = 0.000002;
  func_blur[10][7] = 0.000001;
  func_blur[10][8] = 0.000000;
  func_blur[10][9] = 0.000000;
  func_blur[10][10] = 0.000000;

  double temp_integral_x = 0;
  double temp_integral_y = 0;

  if (fDerivative_BlurNeighborhood > 0) {

    if (fDerivative_BlurNeighborhood > 10) {
      mf::LogWarning("CornerFinderAlg")
        << "WARNING...BlurNeighborhoods>10 not currently allowed. Shrinking to 10.";
      fDerivative_BlurNeighborhood = 10;
    }

    TH2F* h_clone_derivative_x = (TH2F*)h_derivative_x.Clone("h_clone_derivative_x");
    TH2F* h_clone_derivative_y = (TH2F*)h_derivative_y.Clone("h_clone_derivative_y");

    temp_integral_x = 0;
    temp_integral_y = 0;

    for (int ix = 1; ix <= h_derivative_x.GetNbinsX(); ix++) {
      for (int iy = 1; iy <= h_derivative_y.GetNbinsY(); iy++) {

        temp_integral_x = 0;
        temp_integral_y = 0;

        for (int jx = ix - fDerivative_BlurNeighborhood; jx <= ix + fDerivative_BlurNeighborhood;
             jx++) {
          for (int jy = iy - fDerivative_BlurNeighborhood; jy <= iy + fDerivative_BlurNeighborhood;
               jy++) {
            temp_integral_x +=
              h_clone_derivative_x->GetBinContent(jx, jy) * func_blur[(ix - jx) + 5][(iy - jy) + 5];
            temp_integral_y +=
              h_clone_derivative_y->GetBinContent(jx, jy) * func_blur[(ix - jx) + 5][(iy - jy) + 5];
          }
        }
        h_derivative_x.SetBinContent(ix, iy, temp_integral_x);
        h_derivative_y.SetBinContent(ix, iy, temp_integral_y);
      }
    }

    delete h_clone_derivative_x;
    delete h_clone_derivative_y;

  } //end if blur
}

//-----------------------------------------------------------------------------
// Corner Score

void corner::CornerFinderAlg::create_cornerScore_histogram(TH2F const& h_derivative_x,
                                                           TH2F const& h_derivative_y,
                                                           TH2D& h_cornerScore)
{
  const int x_bins = h_derivative_x.GetNbinsX();
  const int y_bins = h_derivative_y.GetNbinsY();

  //the structure tensor elements
  double st_xx = 0., st_xy = 0., st_yy = 0.;

  for (int iy = 1 + fCornerScore_neighborhood; iy <= (y_bins - fCornerScore_neighborhood); iy++) {
    for (int ix = 1 + fCornerScore_neighborhood; ix <= (x_bins - fCornerScore_neighborhood); ix++) {

      if (ix == 1 + fCornerScore_neighborhood) {
        st_xx = 0.;
        st_xy = 0.;
        st_yy = 0.;

        for (int jx = ix - fCornerScore_neighborhood; jx <= ix + fCornerScore_neighborhood; jx++) {
          for (int jy = iy - fCornerScore_neighborhood; jy <= iy + fCornerScore_neighborhood;
               jy++) {

            st_xx += h_derivative_x.GetBinContent(jx, jy) * h_derivative_x.GetBinContent(jx, jy);
            st_yy += h_derivative_y.GetBinContent(jx, jy) * h_derivative_y.GetBinContent(jx, jy);
            st_xy += h_derivative_x.GetBinContent(jx, jy) * h_derivative_y.GetBinContent(jx, jy);
          }
        }
      }

      // we do it this way to reduce computation time
      else {
        for (int jy = iy - fCornerScore_neighborhood; jy <= iy + fCornerScore_neighborhood; jy++) {

          st_xx -= h_derivative_x.GetBinContent(ix - fCornerScore_neighborhood - 1, jy) *
                   h_derivative_x.GetBinContent(ix - fCornerScore_neighborhood - 1, jy);
          st_xx += h_derivative_x.GetBinContent(ix + fCornerScore_neighborhood, jy) *
                   h_derivative_x.GetBinContent(ix + fCornerScore_neighborhood, jy);

          st_yy -= h_derivative_y.GetBinContent(ix - fCornerScore_neighborhood - 1, jy) *
                   h_derivative_y.GetBinContent(ix - fCornerScore_neighborhood - 1, jy);
          st_yy += h_derivative_y.GetBinContent(ix + fCornerScore_neighborhood, jy) *
                   h_derivative_y.GetBinContent(ix + fCornerScore_neighborhood, jy);

          st_xy -= h_derivative_x.GetBinContent(ix - fCornerScore_neighborhood - 1, jy) *
                   h_derivative_y.GetBinContent(ix - fCornerScore_neighborhood - 1, jy);
          st_xy += h_derivative_x.GetBinContent(ix + fCornerScore_neighborhood, jy) *
                   h_derivative_y.GetBinContent(ix + fCornerScore_neighborhood, jy);
        }
      }

      if (fCornerScore_algorithm.compare("Noble") == 0) {
        h_cornerScore.SetBinContent(
          ix, iy, (st_xx * st_yy - st_xy * st_xy) / (st_xx + st_yy + fCornerScore_Noble_epsilon));
      }
      else if (fCornerScore_algorithm.compare("Harris") == 0) {
        h_cornerScore.SetBinContent(
          ix,
          iy,
          (st_xx * st_yy - st_xy * st_xy) -
            ((st_xx + st_yy) * (st_xx + st_yy) * fCornerScore_Harris_kappa));
      }
      else {
        mf::LogError("CornerFinderAlg") << "BAD CORNER ALGORITHM: " << fCornerScore_algorithm;
        return;
      }

    } // end for loop over x bins
  }   // end for loop over y bins
}

//-----------------------------------------------------------------------------
// Max Supress
std::vector<recob::EndPoint2D> corner::CornerFinderAlg::perform_maximum_suppression(
  TH2D const& h_cornerScore,
  std::vector<geo::WireID> wireIDs,
  geo::View_t view,
  TH2D& h_maxSuppress,
  int startx,
  int starty) const
{
  std::vector<recob::EndPoint2D> corner_vector;
  const int x_bins = h_cornerScore.GetNbinsX();
  const int y_bins = h_cornerScore.GetNbinsY();

  for (int iy = 1; iy <= y_bins; iy++) {
    for (int ix = 1; ix <= x_bins; ix++) {

      if (h_cornerScore.GetBinContent(ix, iy) < fMaxSuppress_threshold) continue;

      double temp_max = -1000;
      double temp_center_bin = false;

      for (int jx = ix - fMaxSuppress_neighborhood; jx <= ix + fMaxSuppress_neighborhood; jx++) {
        for (int jy = iy - fMaxSuppress_neighborhood; jy <= iy + fMaxSuppress_neighborhood; jy++) {

          if (h_cornerScore.GetBinContent(jx, jy) > temp_max) {
            temp_max = h_cornerScore.GetBinContent(jx, jy);
            if (jx == ix && jy == iy)
              temp_center_bin = true;
            else {
              temp_center_bin = false;
            }
          }
        }
      }

      if (temp_center_bin) {

        float time_tick = 0.5 * (float)((2 * (iy + starty)) * fConversion_bins_per_input_y);
        int wire_number = ((2 * (ix + startx)) * fConversion_bins_per_input_x) / 2;
        double totalQ = 0;
        int id = 0;
        recob::EndPoint2D corner(
          time_tick, wireIDs[wire_number], h_cornerScore.GetBinContent(ix, iy), id, view, totalQ);
        corner_vector.push_back(corner);

        h_maxSuppress.SetBinContent(ix, iy, h_cornerScore.GetBinContent(ix, iy));
      }
    }
  }
  return corner_vector;
}

/* Silly little function for doing a line integral type thing. Needs improvement. */
float corner::CornerFinderAlg::line_integral(TH2F const& hist,
                                             int begin_x,
                                             float begin_y,
                                             int end_x,
                                             float end_y,
                                             float threshold) const
{
  int x1 = hist.GetXaxis()->FindBin(begin_x);
  int y1 = hist.GetYaxis()->FindBin(begin_y);
  int x2 = hist.GetXaxis()->FindBin(end_x);
  int y2 = hist.GetYaxis()->FindBin(end_y);

  if (x1 == x2 && abs(y1 - y2) < 1e-5) return 0;

  if (x2 < x1) {
    std::swap(x1, x2);
    std::swap(y1, y2);
  }

  float fraction = 0;
  int bin_counter = 0;

  if (x2 != x1) {

    float slope = (y2 - y1) / ((float)(x2 - x1));

    for (int ix = x1; ix <= x2; ix++) {

      int y_min, y_max;

      if (slope >= 0) {
        y_min = y1 + slope * (ix - x1);
        y_max = y1 + slope * (ix + 1 - x1);
      }
      else {
        y_max = (y1 + 1) + slope * (ix - x1);
        y_min = (y1 + 1) + slope * (ix + 1 - x1);
      }

      for (int iy = y_min; iy <= y_max; iy++) {
        bin_counter++;

        if (hist.GetBinContent(ix, iy) > threshold) fraction += 1.;
      }
    }
  }
  else {

    auto const [y_min, y_max] = std::minmax(y1, y2);
    for (int iy = y_min; iy <= y_max; iy++) {
      bin_counter++;
      if (hist.GetBinContent(x1, iy) > threshold) fraction += 1.;
    }
  }

  return fraction / bin_counter;
}

//-----------------------------------------------------------------------------
// Do the silly little line integral score thing
void corner::CornerFinderAlg::calculate_line_integral_score(
  TH2F const& h_wire_data,
  std::vector<recob::EndPoint2D> const& corner_vector,
  std::vector<recob::EndPoint2D>& corner_lineIntegralScore_vector,
  TH2F& h_lineIntegralScore) const
{
  for (auto const i_corner : corner_vector) {

    float score = 0;
    for (auto const j_corner : corner_vector) {

      if (line_integral(h_wire_data,
                        i_corner.WireID().Wire,
                        i_corner.DriftTime(),
                        j_corner.WireID().Wire,
                        j_corner.DriftTime(),
                        fIntegral_bin_threshold) > fIntegral_fraction_threshold) {
        score += 1.;
      }
    }

    recob::EndPoint2D corner(i_corner.DriftTime(),
                             i_corner.WireID(),
                             score,
                             i_corner.ID(),
                             i_corner.View(),
                             i_corner.Charge());

    corner_lineIntegralScore_vector.push_back(corner);

    h_lineIntegralScore.SetBinContent(h_wire_data.GetXaxis()->FindBin(i_corner.WireID().Wire),
                                      h_wire_data.GetYaxis()->FindBin(i_corner.DriftTime()),
                                      score);
  }
}

TH2F const& corner::CornerFinderAlg::GetWireDataHist(unsigned int i_plane) const
{
  return WireData_histos.at(i_plane);
}