An abstract base classes for which the same implementation can be used for both SingleFrameAlgorithm and ForcedAlgorithm. More...

#include <Algorithm.h>

Inheritance diagram for lsst::meas::base::SimpleAlgorithm:

Public Member Functions
void	measureForced (afw::table::SourceRecord &measRecord, afw::image::Exposure< float > const &exposure, afw::table::SourceRecord const &refRecord, afw::geom::SkyWcs const &refWcs) const override
	Called to measure a single child source in an image.

void	measureNForced (afw::table::SourceCatalog const &measCat, afw::image::Exposure< float > const &exposure, afw::table::SourceCatalog const &refRecord, afw::geom::SkyWcs const &refWcs) const override
	Called to simultaneously measure all children in a deblend family, in a single image.

virtual void	measure (afw::table::SourceRecord &measRecord, afw::image::Exposure< float > const &exposure) const =0
	Called to measure a single child source in an image.

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.

virtual void	fail (afw::table::SourceRecord &measRecord, MeasurementError *error=nullptr) const =0
	Handle an exception thrown by the current algorithm by setting flags in the given record.

std::string	getLogName () const

Protected Attributes
std::string	_logName

Detailed Description

An abstract base classes for which the same implementation can be used for both SingleFrameAlgorithm and ForcedAlgorithm.

SimpleAlgorithm allows a ForcedAlgorithm to be defined using the measure() and measureN() signatures of SingleFrameAlgorithm. It should be used for any algorithm for which the forced version of the algorithm does not require anything to be transformed beyond the centroid and shape, and for which the the parameters being fit are the same for both single-frame and forced measurement. This should be the case for all flux algorithms that don't involve fitting any additional model parameters. It can also be used for centroid and shape algorithms, where having a version that can re-measure values in forced mode may be useful for diagnostic purposes even if it is not useful for science.

Definition at line 170 of file Algorithm.h.

Member Function Documentation

◆ fail()

virtual void lsst::meas::base::BaseAlgorithm::fail	(	afw::table::SourceRecord &	measRecord,
		MeasurementError *	error = nullptr ) const

pure virtualinherited

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.

◆ getLogName()

std::string lsst::meas::base::BaseAlgorithm::getLogName ( ) const

inlineinherited

Definition at line 66 of file Algorithm.h.

66{ return _logName; }

lsst::meas::base::BaseAlgorithm::_logName

std::string _logName

Definition Algorithm.h:69

◆ measure()

virtual void lsst::meas::base::SingleFrameAlgorithm::measure	(	afw::table::SourceRecord &	measRecord,
		afw::image::Exposure< float > const &	exposure ) const

pure virtualinherited

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.

◆ measureForced()

void lsst::meas::base::SimpleAlgorithm::measureForced	(	afw::table::SourceRecord &	measRecord,
		afw::image::Exposure< float > const &	exposure,
		afw::table::SourceRecord const &	refRecord,
		afw::geom::SkyWcs const &	refWcs ) const

inlineoverridevirtual

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.

Reimplemented in lsst::meas::extensions::photometryKron::KronFluxAlgorithm.

Definition at line 172 of file Algorithm.h.

                                                                           {
        measure(measRecord, exposure);
    }

◆ measureN()

void lsst::meas::base::SingleFrameAlgorithm::measureN	(	afw::table::SourceCatalog const &	measCat,
		afw::image::Exposure< float > const &	exposure ) const

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 31 of file Algorithm.cc.

                                                                                   {
    throw LSST_EXCEPT(pex::exceptions::LogicError, "measureN not implemented for this algorithm");
}

◆ measureNForced()

void lsst::meas::base::SimpleAlgorithm::measureNForced	(	afw::table::SourceCatalog const &	measCat,
		afw::image::Exposure< float > const &	exposure,
		afw::table::SourceCatalog const &	refRecord,
		afw::geom::SkyWcs const &	refWcs ) const

inlineoverridevirtual

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 179 of file Algorithm.h.

                                                                            {
        measureN(measCat, exposure);
    }

Member Data Documentation

◆ _logName

std::string lsst::meas::base::BaseAlgorithm::_logName

protectedinherited

Definition at line 69 of file Algorithm.h.

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

/j/snowflake/release/lsstsw/stack/lsst-scipipe-9.0.0/Linux64/meas_base/gacf8899fa4+c69c5206e8/include/lsst/meas/base/Algorithm.h

Public Member Functions

Protected Attributes