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DM-51670: Update primary flags to use the new deblender model API #450

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Merged
merged 2 commits into from
Nov 27, 2025
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DM-51670: Update primary flags to use the new deblender model API #450

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b4daed4
Update to new deblender model API
fred3m Nov 14, 2025
fae7426
Simplify condition
fred3m Nov 22, 2025
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23 changes: 9 additions & 14 deletions python/lsst/meas/algorithms/setPrimaryFlags.py
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Original file line number Diff line number Diff line change
Expand Up @@ -285,26 +285,21 @@ def getDeblendPrimaryFlags(sources):
True for each source that is a "DeblendedSourceModel"
as defined above.
"""
nChildKey = "deblend_nChild"
nChild = sources[nChildKey]
parent = sources["parent"]

if "deblend_scarletFlux" in sources.schema:
# The number of peaks in the sources footprint.
# This (may be) different than nChild,
# the number of deblended sources in the catalog,
# because some peaks might have been culled during deblending.
nPeaks = sources["deblend_nPeaks"]
# The number of peaks in the parent footprint
parentNChild = sources["deblend_parentNChild"]
# It is possible for a catalog to contain a hierarchy of sources,
# so we mark the leaves (end nodes of the hierarchy tree with no
# children).
isLeaf = nPeaks == 1
# The number of peaks in the deconvolved-parent footprint
blendNChild = sources["deblend_blendNChild"]
fromBlend = parentNChild > 1
isIsolated = isLeaf & ((parent == 0) | parentNChild == 1)
isDeblendedSource = (fromBlend & isLeaf) | (isIsolated & (parent == 0))
isDeblendedModelSource = (parent != 0) & isLeaf
isIsolated = (blendNChild == 0) | (parentNChild == 1)
isDeblendedSource = (blendNChild == 0) | (parentNChild > 1)
isDeblendedModelSource = parent != 0
else:
nChildKey = "deblend_nChild"
nChild = sources[nChildKey]
parent = sources["parent"]
# Set the flags for meas_deblender
fromBlend = parent != 0
isIsolated = (nChild == 0) & (parent == 0)
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