lsst.meas.base.plugins.ForcedTransformedCentroidPlugin Class Reference

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

Public Member Functions
def	getExecutionOrder
def	__init__
def	measure

Public Attributes
	centroidKey
	flagKey

Static Public Attributes
	ConfigClass = ForcedTransformedCentroidConfig

Detailed Description

A centroid pseudo-algorithm for forced measurement that simply transforms the centroid
from the reference catalog to the measurement coordinate system.  This is used as
the slot centroid 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 243 of file plugins.py.

Constructor & Destructor Documentation

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

Definition at line 256 of file plugins.py.

    def __init__(self, config, name, schemaMapper, metadata):
        ForcedPlugin.__init__(self, config, name, schemaMapper, metadata)
        schema = schemaMapper.editOutputSchema()
        # Allocate x and y fields, join these into a single FunctorKey for ease-of-use.
        xKey = schema.addField(name + "_x", type="D", doc="transformed reference centroid column",
                               units="pixels")
        yKey = schema.addField(name + "_y", type="D", doc="transformed reference centroid row",
                               units="pixels")
        self.centroidKey = lsst.afw.table.Point2DKey(xKey, yKey)
        # 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_Centroid_flag" in schemaMapper.getInputSchema():
            self.flagKey = schema.addField(name + "_flag", type="Flag",
                                           doc="whether the reference centroid is marked as bad")
        else:
            self.flagKey = None