File NaiveCentroid.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 NaiveCentroidAlgorithm : public lsst::meas::base::SimpleAlgorithm

#include <NaiveCentroid.h>

A class that calculates a centroid as a simple unweighted first moment of the 3x3 region around a pixel.

A fixed background (set via config) may optionally be subtracted. This algorithm does not currently report an error, but it probably should.

Public Types

typedef NaiveCentroidControl Control

Public Functions

NaiveCentroidAlgorithm(Control const &ctrl, std::string const &name, afw::table::Schema &schema)

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_COUNTS

FlagDefinition const EDGE

Private Members

Control _ctrl

CentroidResultKey _centroidKey

FlagHandler _flagHandler

SafeCentroidExtractor _centroidExtractor

CentroidChecker _centroidChecker

class NaiveCentroidControl

#include <NaiveCentroid.h>

A C++ control class to handle NaiveCentroidAlgorithm’s configuration.

Public Functions

lsst::meas::base::NaiveCentroidControl::LSST_CONTROL_FIELD(background, double, "Value to subtract from the image pixel values")

lsst::meas::base::NaiveCentroidControl::LSST_CONTROL_FIELD(doFootprintCheck, bool, "Do check that the centroid is contained in footprint.")

lsst::meas::base::NaiveCentroidControl::LSST_CONTROL_FIELD(maxDistToPeak, double, "If set, 0, Centroid Check also checks distance from footprint peak.")

NaiveCentroidControl()

Default constructor.

All control classes should define a default constructor that sets all fields to their default values.

class NaiveCentroidTransform : public lsst::meas::base::CentroidTransform

Public Types

typedef NaiveCentroidControl Control

Public Functions

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