Inheritance diagram for lsst.meas.base.plugins.ForcedTransformedShapePlugin:

Public Member Functions
	getExecutionOrder (cls)

	__init__ (self, config, name, schemaMapper, metadata)

	measure (self, measRecord, exposure, refRecord, refWcs)

Public Attributes
	shapeKey

	flagKey

Static Public Attributes
	ConfigClass = ForcedTransformedShapeConfig

Detailed Description

Record the transformation of the reference catalog shape.

The shape recorded in the reference catalog is tranformed to the
measurement coordinate system and stored.

Parameters
----------
config : `ForcedTransformedShapeConfig`
    Plugin configuration
name : `str`
    Plugin name
schemaMapper : `lsst.afw.table.SchemaMapper`
    A mapping from reference catalog fields to output
    catalog fields. Output fields are added to the output schema.
metadata : `lsst.daf.base.PropertySet`
    Plugin metadata that will be attached to the output catalog.

Notes
-----
This is used as the slot shape by default in forced measurement, allowing
subsequent measurements to simply refer to the slot value just as they
would in single-frame measurement.

Definition at line 903 of file plugins.py.

Constructor & Destructor Documentation

◆ init()

lsst.meas.base.plugins.ForcedTransformedShapePlugin.__init__	(	self,
		config,
		name,
		schemaMapper,
		metadata )

Reimplemented from lsst.meas.base.forcedMeasurement.ForcedPlugin.

Definition at line 934 of file plugins.py.

    def __init__(self, config, name, schemaMapper, metadata):
        ForcedPlugin.__init__(self, config, name, schemaMapper, metadata)
        schema = schemaMapper.editOutputSchema()
        # Allocate xx, yy, xy fields, join these into a single FunctorKey for ease-of-use.
        xxKey = schema.addField(name + "_xx", type="D", doc="transformed reference shape x^2 moment",
                                units="pixel^2")
        yyKey = schema.addField(name + "_yy", type="D", doc="transformed reference shape y^2 moment",
                                units="pixel^2")
        xyKey = schema.addField(name + "_xy", type="D", doc="transformed reference shape xy moment",
                                units="pixel^2")
        self.shapeKey = lsst.afw.table.QuadrupoleKey(xxKey, yyKey, xyKey)
        # Because we're taking the reference position as given, we don't bother transforming its
        # uncertainty and reporting that here, so there are no sigma or cov fields.  We do propagate
        # the flag field, if it exists.
        if "slot_Shape_flag" in schemaMapper.getInputSchema():
            self.flagKey = schema.addField(name + "_flag", type="Flag",
                                           doc="whether the reference shape is marked as bad")
        else:
            self.flagKey = None
 

Member Function Documentation

◆ getExecutionOrder()

lsst.meas.base.plugins.ForcedTransformedShapePlugin.getExecutionOrder ( cls )

Get the relative execution order of this plugin.

Must be reimplemented as a class method by concrete derived classes.

Reimplemented from lsst.meas.base.pluginsBase.BasePlugin.

Definition at line 931 of file plugins.py.

    def getExecutionOrder(cls):
        return cls.SHAPE_ORDER
 

◆ measure()

lsst.meas.base.plugins.ForcedTransformedShapePlugin.measure	(	self,
		measRecord,
		exposure,
		refRecord,
		refWcs )

Measure the properties of a source given an image and a reference.

Parameters
----------
exposure : `lsst.afw.image.ExposureF`
    The pixel data to be measured, together with the associated PSF,
    WCS, etc. All other sources in the image should have been replaced
    by noise according to deblender outputs.
measRecord : `lsst.afw.table.SourceRecord`
    Record describing the object being measured. Previously-measured
    quantities will be retrieved from here, and it will be updated
    in-place with the outputs of this plugin.
refRecord : `lsst.afw.table.SimpleRecord`
    Additional parameters to define the fit, as measured elsewhere.
refWcs : `lsst.afw.geom.SkyWcs` or `lsst.afw.geom.Angle`
    The coordinate system for the reference catalog values. An
    `~lsst.geom.Angle` may be passed, indicating that a local tangent
    WCS should be created for each object using the given angle as a
    pixel scale.

Notes
-----
In the normal mode of operation, the source centroid will be set to
the WCS-transformed position of the reference object, so plugins that
only require a reference position should not have to access the
reference object at all.

Reimplemented from lsst.meas.base.forcedMeasurement.ForcedPlugin.

Definition at line 954 of file plugins.py.

    def measure(self, measRecord, exposure, refRecord, refWcs):
        targetWcs = exposure.getWcs()
        if not refWcs == targetWcs:
            fullTransform = lsst.afw.geom.makeWcsPairTransform(refWcs, targetWcs)
            localTransform = lsst.afw.geom.linearizeTransform(fullTransform, refRecord.getCentroid())
            measRecord.set(self.shapeKey, refRecord.getShape().transform(localTransform.getLinear()))
        else:
            measRecord.set(self.shapeKey, refRecord.getShape())
        if self.flagKey is not None:
            measRecord.set(self.flagKey, refRecord.getShapeFlag())

Member Data Documentation

◆ ConfigClass

lsst.meas.base.plugins.ForcedTransformedShapePlugin.ConfigClass = ForcedTransformedShapeConfig

static

Definition at line 928 of file plugins.py.

◆ flagKey

lsst.meas.base.plugins.ForcedTransformedShapePlugin.flagKey

Definition at line 949 of file plugins.py.

◆ shapeKey

lsst.meas.base.plugins.ForcedTransformedShapePlugin.shapeKey

Definition at line 944 of file plugins.py.

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

/j/snowflake/release/lsstsw/stack/lsst-scipipe-8.0.0/Linux64/meas_base/gf18bd8381d+7268b93478/python/lsst/meas/base/plugins.py

Public Member Functions

Public Attributes

Static Public Attributes