lsst.jointcal  14.0-15-gc2c14a3
FitterBase.h
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1 // -*- LSST-C++ -*-
2 #ifndef LSST_JOINTCAL_FITTER_BASE_H
3 #define LSST_JOINTCAL_FITTER_BASE_H
4 
7 #include "lsst/jointcal/Chi2.h"
11 
12 namespace lsst {
13 namespace jointcal {
14 
16 enum class MinimizeResult {
17  Converged, // fit has converged - no more outliers
18  Chi2Increased, // still some ouliers but chi2 increases
19  Failed // factorization failed
20 };
21 
28 class FitterBase {
29 public:
31  : _associations(associations), _whatToFit(""), _lastNTrip(0), _nParTot(0), _nMeasuredStars(0) {}
32 
34  FitterBase(FitterBase const &) = delete;
35  FitterBase(FitterBase &&) = delete;
36  FitterBase &operator=(FitterBase const &) = delete;
37  FitterBase &operator=(FitterBase &&) = delete;
38 
61  MinimizeResult minimize(std::string const &whatToFit, double nSigmaCut = 0);
62 
66  Chi2Statistic computeChi2() const;
67 
77  void leastSquareDerivatives(TripletList &tripletList, Eigen::VectorXd &grad) const;
78 
87  virtual void offsetParams(Eigen::VectorXd const &delta) = 0;
88 
94  virtual void assignIndices(std::string const &whatToFit) = 0;
95 
104  virtual void saveChi2Contributions(std::string const &baseName) const;
105 
107  virtual void saveChi2MeasContributions(std::string const &baseName) const = 0;
108 
110  virtual void saveChi2RefContributions(std::string const &baseName) const = 0;
111 
112 protected:
115 
116  int _lastNTrip; // last triplet count, used to speed up allocation
117  unsigned int _nParTot;
118  unsigned _nMeasuredStars;
119 
136  unsigned findOutliers(double nSigmaCut, MeasuredStarList &msOutliers, FittedStarList &fsOutliers) const;
137 
142  void outliersContributions(MeasuredStarList &msOutliers, FittedStarList &fsOutliers,
143  TripletList &tripletList, Eigen::VectorXd &grad);
144 
146  void removeMeasOutliers(MeasuredStarList &outliers);
147 
149  void removeRefOutliers(FittedStarList &outliers);
150 
152  virtual void getIndicesOfMeasuredStar(MeasuredStar const &measuredStar,
153  std::vector<unsigned> &indices) const = 0;
154 
156  virtual void accumulateStatImageList(CcdImageList const &ccdImageList, Chi2Accumulator &accum) const = 0;
157 
159  virtual void accumulateStatRefStars(Chi2Accumulator &accum) const = 0;
160 
166  virtual void leastSquareDerivativesMeasurement(
167  CcdImage const &ccdImage, TripletList &tripletList, Eigen::VectorXd &grad,
168  MeasuredStarList const *measuredStarList = nullptr) const = 0;
169 
171  virtual void leastSquareDerivativesReference(FittedStarList const &fittedStarList,
172  TripletList &tripletList, Eigen::VectorXd &grad) const = 0;
173 };
174 } // namespace jointcal
175 } // namespace lsst
176 #endif // LSST_JOINTCAL_FITTER_BASE_H
Simple structure to accumulate chi2 and ndof.
Definition: Chi2.h:29
Base class for fitters.
Definition: FitterBase.h:28
Base class for Chi2Statistic and Chi2List, to allow addEntry inside Fitter for either class...
Definition: Chi2.h:21
FitResults minimize(lsst::afw::math::Function1< ReturnT > const &function, std::vector< double > const &initialParameterList, std::vector< double > const &stepSizeList, std::vector< double > const &measurementList, std::vector< double > const &varianceList, std::vector< double > const &xPositionList, double errorDef)
A list of MeasuredStar. They are usually filled in Associations::AddImage.
Definition: MeasuredStar.h:111
MinimizeResult
Return value of minimize()
Definition: FitterBase.h:16
FitterBase(std::shared_ptr< Associations > associations)
Definition: FitterBase.h:30
STL class.
Class for a simple mapping implementing a generic Gtransfo.
double computeChi2(const StarMatchList &L, const Gtransfo &gtransfo)
the actual chi2
Definition: StarMatch.cc:219
A list of FittedStar s. Such a list is typically constructed by Associations.
Definition: FittedStar.h:121
objects measured on actual images.
Definition: MeasuredStar.h:18
std::shared_ptr< Associations > _associations
Definition: FitterBase.h:113
Handler of an actual image from a single CCD.
Definition: CcdImage.h:34