#
# LSST Data Management System
# Copyright 2008-2017 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 <http://www.lsstcorp.org/LegalNotices/>.
#
import math
import unittest
import lsst.geom
import lsst.afw.image as afwImage
import lsst.afw.geom as afwGeom
import lsst.afw.table as afwTable
import lsst.meas.base as measBase
import lsst.utils.tests as utilsTests
import lsst.afw.detection.detectionLib as afwDetection
import lsst.afw.detection
try:
type(verbose)
except NameError:
display = False
verbose = 0
class CentroidTestCase(utilsTests.TestCase):
"""A test case for centroiding"""
def setUp(self):
pass
def tearDown(self):
pass
def testCleanup(self):
"""Test that tearDown does"""
pass
def do_testAstrometry(self, alg, bkgd, control):
"""Test that we can instantiate and play with a centroiding algorithms"""
schema = afwTable.SourceTable.makeMinimalSchema()
schema.getAliasMap().set("slot_Centroid", "test")
centroider = alg(control, "test", schema)
table = afwTable.SourceCatalog(schema)
x0, y0 = 12345, 54321
for imageFactory in (afwImage.MaskedImageF,):
im = imageFactory(lsst.geom.ExtentI(100, 100))
im.setXY0(lsst.geom.Point2I(x0, y0))
# This fixed DoubleGaussianPsf replaces a computer generated one.
# The values are not anything in particular, just a reasonable size.
psf = lsst.afw.detection.GaussianPsf(15, 15, 3.0)
exp = afwImage.makeExposure(im)
exp.setPsf(psf)
im.set(bkgd)
x, y = 30, 20
im.image[x, y, afwImage.LOCAL] = 1010
source = table.addNew()
spans = afwGeom.SpanSet(exp.getBBox(afwImage.LOCAL))
foot = afwDetection.Footprint(spans)
foot.addPeak(x + x0, y + y0, 1010)
source.setFootprint(foot)
centroider.measure(source, exp)
self.assertFloatsAlmostEqual(x + x0, source.getX(), rtol=.00001)
self.assertFloatsAlmostEqual(y + y0, source.getY(), rtol=.00001)
self.assertFalse(source.get("test_flag"))
im.set(bkgd)
im.image[10, 20, afwImage.LOCAL] = 1010
im.image[10, 21, afwImage.LOCAL] = 1010
im.image[11, 20, afwImage.LOCAL] = 1010
im.image[11, 21, afwImage.LOCAL] = 1010
x, y = 10.5 + x0, 20.5 + y0
source = table.addNew()
source.set('test_x', x)
source.set('test_y', y)
centroider.measure(source, exp)
self.assertFloatsAlmostEqual(x, source.getX(), rtol=.00001)
self.assertFloatsAlmostEqual(y, source.getY(), rtol=.00001)
self.assertFalse(source.get("test_flag"))
def testNaiveMeasureCentroid(self):
"""Test that we can instantiate and play with NAIVE centroids"""
bkgd = 10.0
afwTable.SourceTable.makeMinimalSchema()
control = measBase.NaiveCentroidControl()
control.background = bkgd
control.doFootprintCheck = False
self.do_testAstrometry(measBase.NaiveCentroidAlgorithm, bkgd, control)
def testSdssMeasureCentroid(self):
"""Test that we can instantiate and play with SDSS centroids"""
control = measBase.SdssCentroidControl()
control.doFootprintCheck = False
self.do_testAstrometry(measBase.SdssCentroidAlgorithm, 10.0, control)
class SingleFrameMeasurementTaskTestCase(utilsTests.TestCase):
"""A test case for the SingleFrameMeasurementTask"""
def mySetup(self):
msConfig = measBase.SingleFrameMeasurementConfig()
msConfig.algorithms.names = ["base_SdssCentroid"]
msConfig.slots.centroid = "base_SdssCentroid"
msConfig.slots.shape = None
msConfig.slots.psfShape = None
msConfig.slots.apFlux = None
msConfig.slots.modelFlux = None
msConfig.slots.psfFlux = None
msConfig.slots.instFlux = None
msConfig.slots.calibFlux = None
schema = afwTable.SourceTable.makeMinimalSchema()
task = measBase.SingleFrameMeasurementTask(schema, config=msConfig)
measCat = afwTable.SourceCatalog(schema)
source = measCat.addNew()
spans = afwGeom.SpanSet(self.exp.getBBox(afwImage.LOCAL))
fp = afwDetection.Footprint(spans)
fp.addPeak(50, 50, 1000.0)
source.setFootprint(fp)
# Then run the default SFM task. Results not checked
task.run(measCat, self.exp)
return source
def setUp(self):
"""Make the image we'll measure"""
self.exp = afwImage.ExposureF(100, 100)
psf = lsst.afw.detection.GaussianPsf(15, 15, 3.0)
self.exp.setPsf(psf)
self.I0, self.xcen, self.ycen = 1000.0, 50.5, 50.0
im = self.exp.getMaskedImage().getImage()
for i in (-1, 0, 1):
for j in (-1, 0, 1):
im[int(self.xcen) + i, int(self.ycen) + j, afwImage.LOCAL] = \
self.I0*(1 - 0.5*math.hypot(i - 0.5, j))
def tearDown(self):
del self.exp
def testCentroider(self):
"""Measure the centroid"""
s = self.mySetup()
# this does not match exactly, and it used to
self.assertFloatsAlmostEqual(s.getCentroid(), lsst.geom.PointD(self.xcen, self.ycen), rtol=.01)
class MemoryTester(lsst.utils.tests.MemoryTestCase):
pass
def setup_module(module):
lsst.utils.tests.init()
181 ↛ 182line 181 didn't jump to line 182, because the condition on line 181 was never trueif __name__ == "__main__":
lsst.utils.tests.init()
unittest.main()
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