lsst.pipe.tasks g8b9e2231ea+fa07cb600e
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Classes | Variables
lsst.pipe.tasks.metrics Namespace Reference

Classes

class  NumberDeblendedSourcesMetricConnections
 

Variables

lsst sources : `lsst.afw.table.SourceCatalog` or `None`
 
lsst result : `lsst.pipe.base.Struct`
 
lsst catalog : `lsst.afw.table.SourceCatalog`
 
numpy selection : `numpy.ndarray` [`bool`], (N,)
 
numpy filtered : `numpy.ndarray` [`bool`], (N,)
 

Variable Documentation

◆ catalog

lsst lsst.pipe.tasks.metrics.catalog : `lsst.afw.table.SourceCatalog`
if sources is None:
    self.log.info("Nothing to do: no catalogs found.")
    meas = None
# Use deblend_parentNChild rather than detect_fromBlend because the
# latter need not be defined in post-deblending catalogs.
elif "deblend_parentNChild" not in sources.schema or "deblend_nChild" not in sources.schema:
    self.log.info("Nothing to do: no deblending performed.")
    meas = None
else:
    try:
        children = ((sources["deblend_parentNChild"] > 1)  # deblend child
                    & (sources["deblend_nChild"] == 0)     # not deblended
                    )
        children = _filterSkySources(sources, children)
    except LookupError as e:
        # Probably "parent"; all other columns already checked
        raise MetricComputationError("Invalid input catalog") from e
    else:
        nChildren = np.count_nonzero(children)
        meas = Measurement(self.config.metricName, nChildren * u.dimensionless_unscaled)

return Struct(measurement=meas)


def _filterSkySources(catalog, selection):

Definition at line 216 of file metrics.py.

◆ filtered

numpy lsst.pipe.tasks.metrics.filtered : `numpy.ndarray` [`bool`], (N,)

Definition at line 224 of file metrics.py.

◆ result

lsst lsst.pipe.tasks.metrics.result : `lsst.pipe.base.Struct`

Definition at line 86 of file metrics.py.

◆ selection

numpy lsst.pipe.tasks.metrics.selection : `numpy.ndarray` [`bool`], (N,)

Definition at line 218 of file metrics.py.

◆ sources

lsst lsst.pipe.tasks.metrics.sources : `lsst.afw.table.SourceCatalog` or `None`
_DefaultName = "numDeblendedSciSources"
ConfigClass = NumberDeblendedSourcesMetricConfig

def run(self, sources):
if sources is None:
    self.log.info("Nothing to do: no catalogs found.")
    meas = None
elif "deblend_nChild" not in sources.schema:
    self.log.info("Nothing to do: no deblending performed.")
    meas = None
else:
    try:
        deblended = ((sources["parent"] == 0)           # top-level source
                     & (sources["deblend_nChild"] > 0)  # deblended
                     )
        deblended = _filterSkySources(sources, deblended)
    except LookupError as e:
        # Probably "parent"; all other columns already checked
        raise MetricComputationError("Invalid input catalog") from e
    else:
        nDeblended = np.count_nonzero(deblended)
        meas = Measurement(self.config.metricName, nDeblended * u.dimensionless_unscaled)

return Struct(measurement=meas)


class NumberDeblendChildSourcesMetricConnections(
MetricConnections,
defaultTemplates={"package": "pipe_tasks",
                  "metric": "numDeblendChildSciSources"},
dimensions={"instrument", "visit", "detector"},
):
sources = connectionTypes.Input(
doc="The catalog of science sources.",
name="src",
storageClass="SourceCatalog",
dimensions={"instrument", "visit", "detector"},
)


class NumberDeblendChildSourcesMetricConfig(
MetricConfig,
pipelineConnections=NumberDeblendChildSourcesMetricConnections):
pass


@register("numDeblendChildSciSources")
class NumberDeblendChildSourcesMetricTask(MetricTask):
_DefaultName = "numDeblendChildSciSources"
ConfigClass = NumberDeblendChildSourcesMetricConfig

def run(self, sources):

Definition at line 81 of file metrics.py.