File LocalBackground.h

namespace lsst

Class for a simple mapping implementing a generic AstrometryTransform.

Remove all non-astronomical counts from the Chunk Exposure’s pixels.

Forward declarations for lsst::utils::Cache

For details on the Cache class, see the Cache.h file.

It uses a template rather than a pointer so that the derived classes can use the specifics of the transform. The class simplePolyMapping overloads a few routines.

A base class for image defects

Numeric constants used by the Integrate.h integrator routines.

Compute Image Statistics

Note

Gauss-Kronrod-Patterson quadrature coefficients for use in quadpack routine qng. These coefficients were calculated with 101 decimal digit arithmetic by L. W. Fullerton, Bell Labs, Nov 1981.

Note

The Statistics class itself can only handle lsst::afw::image::MaskedImage() types. The philosophy has been to handle other types by making them look like lsst::afw::image::MaskedImage() and reusing that code. Users should have no need to instantiate a Statistics object directly, but should use the overloaded makeStatistics() factory functions.

namespace meas

namespace base

class LocalBackgroundAlgorithm : public lsst::meas::base::SimpleAlgorithm

#include <LocalBackground.h>

A measurement algorithm that estimates the local background value per pixel.

Public Types

typedef LocalBackgroundControl Control

Public Functions

LocalBackgroundAlgorithm(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.

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.

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.

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.

Public Static Functions

static FlagDefinitionList const &getFlagDefinitions()

Public Static Attributes

FlagDefinition const FAILURE

FlagDefinition const NO_GOOD_PIXELS

FlagDefinition const NO_PSF

Private Members

Control _ctrl

FluxResultKey _resultKey

FlagHandler _flagHandler

SafeCentroidExtractor _centroidExtractor

afw::math::StatisticsControl _stats

class LocalBackgroundControl

#include <LocalBackground.h>

Configuration of LocalBackgroundAlgorithm.

Public Functions

lsst::meas::base::LocalBackgroundControl::LSST_CONTROL_FIELD(badMaskPlanes, std::vector< std::string >, "Mask planes that indicate pixels that should be excluded from the measurement")

lsst::meas::base::LocalBackgroundControl::LSST_CONTROL_FIELD(annulusInner, float, "Inner radius for background annulus as a multiple of the PSF sigma")

lsst::meas::base::LocalBackgroundControl::LSST_CONTROL_FIELD(annulusOuter, float, "Outer radius for background annulus as a multiple of the PSF sigma")

lsst::meas::base::LocalBackgroundControl::LSST_CONTROL_FIELD(bgRej, float, "Rejection threshold (in standard deviations) for background measurement")

lsst::meas::base::LocalBackgroundControl::LSST_CONTROL_FIELD(bgIter, int, "Number of sigma-clipping iterations for background measurement")

LocalBackgroundControl()

class LocalBackgroundTransform : public lsst::meas::base::FluxTransform

Public Types

typedef LocalBackgroundControl Control

Public Functions

LocalBackgroundTransform(Control const &ctrl, std::string const &name, afw::table::SchemaMapper &mapper)