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# This file is part of meas_base. 

# 

# Developed for the LSST Data Management System. 

# This product includes software developed by the LSST Project 

# (https://www.lsst.org). 

# See the COPYRIGHT file at the top-level directory of this distribution 

# for details of code ownership. 

# 

# 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 GNU General Public License 

# along with this program. If not, see <https://www.gnu.org/licenses/>. 

 

import unittest 

 

import numpy as np 

 

import lsst.geom 

import lsst.afw.image 

import lsst.utils.tests 

from lsst.meas.base import LocalBackgroundAlgorithm 

from lsst.meas.base.tests import (AlgorithmTestCase, FluxTransformTestCase, 

SingleFramePluginTransformSetupHelper) 

 

 

class LocalBackgroundTestCase(AlgorithmTestCase, lsst.utils.tests.TestCase): 

"""Test case for the CircularApertureFlux algorithm/plugin. 

""" 

 

def setUp(self): 

self.algName = "base_LocalBackground" 

self.bbox = lsst.geom.Box2I(lsst.geom.Point2I(0, 0), 

lsst.geom.Extent2I(100, 100)) 

self.dataset = lsst.meas.base.tests.TestDataset(self.bbox) 

self.dataset.addSource(100000.0, lsst.geom.Point2D(49.5, 49.5)) 

 

self.bgValue = 1234.56789 

self.bgStdev = 12.3456789 

self.annulusInner = 5 

self.annulusOuter = 15 

psfSize = self.dataset.psfShape.getDeterminantRadius() 

self.numPix = np.pi*(self.annulusOuter**2 - self.annulusInner**2)*psfSize**2 

 

def tearDown(self): 

del self.bbox 

del self.dataset 

 

def checkCatalog(self, task, catalog, exposure, *args): 

exposure.maskedImage.image.array[:] += self.bgValue 

task.run(catalog, exposure, *args) 

self.assertEqual(len(catalog), 1) 

src = catalog[0] 

 

# Check the background measurements 

bgValue = src.get(self.algName + "_instFlux") 

bgStdev = src.get(self.algName + "_instFluxErr") 

self.assertFalse(src.get(self.algName + "_flag")) 

self.assertFalse(src.get(self.algName + "_flag_noGoodPixels")) 

self.assertFalse(src.get(self.algName + "_flag_noPsf")) 

self.assertFloatsAlmostEqual(bgValue, self.bgValue, 

atol=3.0*self.bgStdev/np.sqrt(self.numPix)) # Within 3 sigma 

self.assertFloatsAlmostEqual(bgStdev, self.bgStdev, rtol=0.1) 

 

# Check that the background value is useful, and it's what we'd get if 

# the background wasn't there. 

src = catalog[0] 

psfFlux = src.get("base_PsfFlux_instFlux") - \ 

src.get("base_PsfFlux_area")*src.get(self.algName + "_instFlux") 

exposure.maskedImage.image.array[:] -= self.bgValue 

task.run(catalog, exposure, *args) 

self.assertFloatsAlmostEqual(src.get("base_PsfFlux_instFlux"), psfFlux, rtol=3.0e-4) 

 

def setConfig(self, config): 

config.plugins[self.algName].annulusInner = self.annulusInner 

config.plugins[self.algName].annulusOuter = self.annulusOuter 

config.plugins.names.add("base_PsfFlux") 

 

def testSingleFramePlugin(self): 

config = self.makeSingleFrameMeasurementConfig(self.algName) 

self.setConfig(config) 

task = self.makeSingleFrameMeasurementTask(config=config) 

exposure, catalog = self.dataset.realize(self.bgStdev, task.schema, randomSeed=12345) 

self.checkCatalog(task, catalog, exposure) 

 

def testForcedPlugin(self): 

config = self.makeForcedMeasurementConfig(self.algName) 

self.setConfig(config) 

task = self.makeForcedMeasurementTask(self.algName, config=config) 

measWcs = self.dataset.makePerturbedWcs(self.dataset.exposure.getWcs(), randomSeed=12345) 

measDataset = self.dataset.transform(measWcs) 

exposure, truthCatalog = measDataset.realize(self.bgStdev, measDataset.makeMinimalSchema(), 

randomSeed=12345) 

refCat = self.dataset.catalog 

refWcs = self.dataset.exposure.getWcs() 

measCat = task.generateMeasCat(exposure, refCat, refWcs) 

task.attachTransformedFootprints(measCat, refCat, exposure, refWcs) 

self.checkCatalog(task, measCat, exposure, refCat, refWcs) 

 

 

class LocalBackgroundTransformTestCase(FluxTransformTestCase, SingleFramePluginTransformSetupHelper, 

lsst.utils.tests.TestCase): 

controlClass = lsst.meas.base.LocalBackgroundAlgorithm.Control 

algorithmClass = LocalBackgroundAlgorithm 

transformClass = lsst.meas.base.LocalBackgroundTransform 

flagNames = ('flag', 'flag_noGoodPixels') 

singleFramePlugins = ('base_LocalBackground',) 

forcedPlugins = ('base_LocalBackground',) 

 

 

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

pass 

 

 

def setup_module(module): 

lsst.utils.tests.init() 

 

 

126 ↛ 127line 126 didn't jump to line 127, because the condition on line 126 was never trueif __name__ == "__main__": 

lsst.utils.tests.init() 

unittest.main()