lsst.meas.base
14.0-13-gd9a51ef+9
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A measurement algorithm that estimates flux using a linear least-squares fit with the Psf model. More...
#include <PsfFlux.h>
Public Types | |
typedef PsfFluxControl | Control |
A typedef to the Control object for this algorithm, defined above. More... | |
Public Member Functions | |
PsfFluxAlgorithm (Control const &ctrl, std::string const &name, afw::table::Schema &schema, std::string const &logName="") | |
virtual void | measure (afw::table::SourceRecord &measRecord, afw::image::Exposure< float > const &exposure) const |
Called to measure a single child source in an image. More... | |
virtual void | fail (afw::table::SourceRecord &measRecord, MeasurementError *error=nullptr) const |
Handle an exception thrown by the current algorithm by setting flags in the given record. More... | |
virtual void | measureForced (afw::table::SourceRecord &measRecord, afw::image::Exposure< float > const &exposure, afw::table::SourceRecord const &refRecord, afw::image::Wcs const &refWcs) const |
Called to measure a single child source in an image. More... | |
virtual void | measureNForced (afw::table::SourceCatalog const &measCat, afw::image::Exposure< float > const &exposure, afw::table::SourceCatalog const &refRecord, afw::image::Wcs const &refWcs) const |
Called to simultaneously measure all children in a deblend family, in a single image. More... | |
virtual void | measureN (afw::table::SourceCatalog const &measCat, afw::image::Exposure< float > const &exposure) const |
Called to simultaneously measure all children in a deblend family, in a single image. More... | |
std::string | getLogName () const |
Static Public Member Functions | |
static FlagDefinitionList const & | getFlagDefinitions () |
Static Public Attributes | |
static FlagDefinition const | FAILURE = flagDefinitions.addFailureFlag() |
static FlagDefinition const | NO_GOOD_PIXELS = flagDefinitions.add("flag_noGoodPixels", "not enough non-rejected pixels in data to attempt the fit") |
static FlagDefinition const | EDGE = flagDefinitions.add("flag_edge", "object was too close to the edge of the image to use the full PSF model") |
Protected Attributes | |
std::string | _logName |
A measurement algorithm that estimates flux using a linear least-squares fit with the Psf model.
The PsfFlux algorithm is extremely simple: we do a least-squares fit of the Psf model (evaluated at a given position) to the data. For point sources, this provides the optimal flux measurement in the limit where the Psf model is correct. We do not use per-pixel weights in the fit, as this results in bright stars being fit with a different effective profile than faint stairs.
lsst::meas::base::PsfFluxAlgorithm::PsfFluxAlgorithm | ( | Control const & | ctrl, |
std::string const & | name, | ||
afw::table::Schema & | schema, | ||
std::string const & | logName = "" |
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Definition at line 55 of file PsfFlux.cc.
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virtual |
Handle an exception thrown by the current algorithm by setting flags in the given record.
fail() is called by the measurement framework when an exception is allowed to propagate out of one the algorithm's measure() methods. It should generally set both a general failure flag for the algorithm as well as a specific flag indicating the error condition, if possible. To aid in this, if the exception was an instance of MeasurementError, it will be passed in, carrying information about what flag to set.
An algorithm can also to chose to set flags within its own measure() methods, and then just return, rather than throw an exception. However, fail() should be implemented even when all known failure modes do not throw exceptions, to ensure that unexpected exceptions thrown in lower-level code are properly handled.
Implements lsst::meas::base::BaseAlgorithm.
Definition at line 137 of file PsfFlux.cc.
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Definition at line 45 of file PsfFlux.cc.
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inlineinherited |
Definition at line 67 of file Algorithm.h.
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Called to measure a single child source in an image.
Before this method is called, all neighbors will be replaced with noise, using the outputs of the deblender. Outputs should be saved in the given SourceRecord, which can also be used to obtain centroid (see SafeCentroidExtractor) and shape (see SafeShapeExtractor) information.
Implements lsst::meas::base::SingleFrameAlgorithm.
Definition at line 71 of file PsfFlux.cc.
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inlinevirtualinherited |
Called to measure a single child source in an image.
Before this method is called, all neighbors will be replaced with noise, using the outputs of the deblender. Outputs should be saved in the given SourceRecord, which can also be used to obtain centroid (see SafeCentroidExtractor) and shape (see SafeShapeExtractor) information.
Implements lsst::meas::base::ForcedAlgorithm.
Definition at line 187 of file Algorithm.h.
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virtualinherited |
Called to simultaneously measure all children in a deblend family, in a single image.
Outputs should be saved in the given SourceCatalog, which can also be used to obtain centroid (see SafeCentroidExtractor) and shape (see SafeShapeExtractor) information.
The default implementation simply throws an exception, indicating that simultaneous measurement is not supported.
Definition at line 29 of file Algorithm.cc.
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inlinevirtualinherited |
Called to simultaneously measure all children in a deblend family, in a single image.
Outputs should be saved in the given SourceCatalog, which can also be used to obtain centroid (see SafeCentroidExtractor) and shape (see SafeShapeExtractor) information.
The default implementation simply throws an exception, indicating that simultaneous measurement is not supported.
Reimplemented from lsst::meas::base::ForcedAlgorithm.
Definition at line 196 of file Algorithm.h.
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protectedinherited |
Definition at line 71 of file Algorithm.h.
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static |
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