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# 

# LSST Data Management System 

# 

# Copyright 2008-2016 AURA/LSST. 

# 

# This product includes software developed by the 

# LSST Project (http://www.lsst.org/). 

# 

# This program is free software: you can redistribute it and/or modify 

# it under the terms of the GNU General Public License as published by 

# the Free Software Foundation, either version 3 of the License, or 

# (at your option) any later version. 

# 

# This program is distributed in the hope that it will be useful, 

# but WITHOUT ANY WARRANTY; without even the implied warranty of 

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 

# GNU General Public License for more details. 

# 

# You should have received a copy of the LSST License Statement and 

# the GNU General Public License along with this program. If not, 

# see <https://www.lsstcorp.org/LegalNotices/>. 

# 

import os 

import unittest 

 

import lsst.utils.tests 

import lsst.afw.image as afwImage 

import lsst.afw.table as afwTable 

from lsst.meas.algorithms.detection import SourceDetectionTask 

from lsst.meas.base import SingleFrameMeasurementTask 

import lsst.meas.deblender as measDeb 

 

try: 

type(display) 

except NameError: 

display = False 

 

DATA_DIR = os.path.join(os.path.dirname(os.path.realpath(__file__)), "data") 

 

 

class IncludeTestCase(lsst.utils.tests.TestCase): 

""" Test case for DM-1738: test that include method successfully 

expands footprint to include the union of itself and all others provided. 

 

In the current version of meas_deblender, children's Footprints can extend outside 

that of the parent. The replace-by-noise code thus fails to reinstate the pixels 

that are outside the parent but within the children. Calling include() prior 

to noise replacement solves this issue. 

 

The test data used here (./data/ticket1738.fits) is a cutout of an HSC observed M31 

field in which this pathology occured: 

--id field=M31 dateObs=2014-11-24 visit=14770 ccd=27 

bbox = afwGeom.Box2I(afwGeom.Point2I(720, 460), afwGeom.Extent2I(301, 301)) 

 

See data/ticket1738_noInclude.png or data/ticket1738_noInclude.fits for a visual 

of this pathology). 

 

""" 

 

def setUp(self): 

self.calexpOrig = afwImage.ExposureF(os.path.join(DATA_DIR, "ticket1738.fits")) 

self.calexp = afwImage.ExposureF(os.path.join(DATA_DIR, "ticket1738.fits")) 

 

def tearDown(self): 

del self.calexpOrig 

del self.calexp 

 

def testInclude(self): 

schema = afwTable.SourceTable.makeMinimalSchema() 

 

# Create the detection task 

config = SourceDetectionTask.ConfigClass() 

config.reEstimateBackground = False # Turn off so that background does not change from orig 

detectionTask = SourceDetectionTask(config=config, schema=schema) 

 

# Create the deblender Task 

debConfig = measDeb.SourceDeblendConfig() 

debTask = measDeb.SourceDeblendTask(schema, config=debConfig) 

 

# Create the measurement Task 

config = SingleFrameMeasurementTask.ConfigClass() 

measureTask = SingleFrameMeasurementTask(schema, config=config) 

 

# Create the output table 

tab = afwTable.SourceTable.make(schema) 

 

# Process the data 

result = detectionTask.run(tab, self.calexp) 

sources = result.sources 

 

# Run the deblender 

debTask.run(self.calexp, sources) 

 

# Run the measurement task: this where the replace-with-noise occurs 

measureTask.run(sources, self.calexp) 

 

plotOnFailure = False 

if display: 

plotOnFailure = True 

 

# The relative differences ranged from 0.02 to ~2. This rtol is somewhat 

# random, but will certainly catch the pathology if it occurs. 

self.assertFloatsAlmostEqual(self.calexpOrig.getMaskedImage().getImage().getArray(), 

self.calexp.getMaskedImage().getImage().getArray(), 

rtol=1E-3, printFailures=False, plotOnFailure=plotOnFailure) 

 

 

class TestMemory(lsst.utils.tests.MemoryTestCase): 

pass 

 

 

def setup_module(module): 

lsst.utils.tests.init() 

 

 

116 ↛ 117line 116 didn't jump to line 117, because the condition on line 116 was never trueif __name__ == "__main__": 

lsst.utils.tests.init() 

unittest.main()