Coverage for tests/test_centroid.py: 21%
93 statements
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« prev ^ index » next coverage.py v7.5.0, created at 2024-05-03 03:00 -0700
1# This file is part of meas_base.
2#
3# Developed for the LSST Data Management System.
4# This product includes software developed by the LSST Project
5# (https://www.lsst.org).
6# See the COPYRIGHT file at the top-level directory of this distribution
7# for details of code ownership.
8#
9# This program is free software: you can redistribute it and/or modify
10# it under the terms of the GNU General Public License as published by
11# the Free Software Foundation, either version 3 of the License, or
12# (at your option) any later version.
13#
14# This program is distributed in the hope that it will be useful,
15# but WITHOUT ANY WARRANTY; without even the implied warranty of
16# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17# GNU General Public License for more details.
18#
19# You should have received a copy of the GNU General Public License
20# along with this program. If not, see <https://www.gnu.org/licenses/>.
22import math
23import unittest
25import lsst.geom
26import lsst.afw.image as afwImage
27import lsst.afw.geom as afwGeom
28import lsst.afw.table as afwTable
29import lsst.meas.base as measBase
30import lsst.utils.tests as utilsTests
31import lsst.afw.detection as afwDetection
34class CentroidTestCase(utilsTests.TestCase):
35 """A test case for centroiding.
36 """
38 def do_testAstrometry(self, alg, bkgd, control):
39 """Test that we can instantiate and play with a centroiding algorithm.
40 """
41 schema = afwTable.SourceTable.makeMinimalSchema()
42 schema.getAliasMap().set("slot_Centroid", "test")
43 centroider = alg(control, "test", schema)
44 table = afwTable.SourceCatalog(schema)
46 x0, y0 = 12345, 54321
47 for imageFactory in (afwImage.MaskedImageF,):
49 im = imageFactory(lsst.geom.ExtentI(100, 100))
50 im.setXY0(lsst.geom.Point2I(x0, y0))
52 # This fixed DoubleGaussianPsf replaces a computer generated one.
53 # The values are not anything in particular, just a reasonable size.
54 psf = afwDetection.GaussianPsf(15, 15, 3.0)
55 exp = afwImage.makeExposure(im)
56 exp.setPsf(psf)
58 im.set(bkgd)
59 x, y = 30, 20
60 im.image[x, y, afwImage.LOCAL] = 1010
62 source = table.addNew()
63 spans = afwGeom.SpanSet(exp.getBBox(afwImage.LOCAL))
64 foot = afwDetection.Footprint(spans)
65 foot.addPeak(x + x0, y + y0, 1010)
66 source.setFootprint(foot)
67 centroider.measure(source, exp)
69 self.assertFloatsAlmostEqual(x + x0, source.getX(), rtol=.00001)
70 self.assertFloatsAlmostEqual(y + y0, source.getY(), rtol=.00001)
71 self.assertFalse(source.get("test_flag"))
73 im.set(bkgd)
74 im.image[10, 20, afwImage.LOCAL] = 1010
75 im.image[10, 21, afwImage.LOCAL] = 1010
76 im.image[11, 20, afwImage.LOCAL] = 1010
77 im.image[11, 21, afwImage.LOCAL] = 1010
79 x, y = 10.5 + x0, 20.5 + y0
80 source = table.addNew()
81 source.set('test_x', x)
82 source.set('test_y', y)
83 centroider.measure(source, exp)
84 self.assertFloatsAlmostEqual(x, source.getX(), rtol=.00001)
85 self.assertFloatsAlmostEqual(y, source.getY(), rtol=.00001)
86 self.assertFalse(source.get("test_flag"))
88 def testSdssMeasureCentroid(self):
89 """Test that we can instantiate and play with SDSS centroids"""
90 control = measBase.SdssCentroidControl()
91 control.doFootprintCheck = False
92 # Test fails with the default of 1, and even 5
93 control.maxDistToPeak = -1.0
94 self.do_testAstrometry(measBase.SdssCentroidAlgorithm, 10.0, control)
97class SingleFrameMeasurementTaskTestCase(utilsTests.TestCase):
98 """A test case for the SingleFrameMeasurementTask.
99 """
101 def mySetup(self):
102 msConfig = measBase.SingleFrameMeasurementConfig()
103 msConfig.algorithms.names = ["base_SdssCentroid"]
104 msConfig.slots.centroid = "base_SdssCentroid"
105 msConfig.slots.shape = None
106 msConfig.slots.psfShape = None
107 msConfig.slots.apFlux = None
108 msConfig.slots.modelFlux = None
109 msConfig.slots.psfFlux = None
110 msConfig.slots.gaussianFlux = None
111 msConfig.slots.calibFlux = None
112 schema = afwTable.SourceTable.makeMinimalSchema()
113 task = measBase.SingleFrameMeasurementTask(schema, config=msConfig)
114 measCat = afwTable.SourceCatalog(schema)
116 source = measCat.addNew()
117 spans = afwGeom.SpanSet(self.exp.getBBox(afwImage.LOCAL))
118 fp = afwDetection.Footprint(spans)
119 fp.addPeak(50, 50, 1000.0)
120 source.setFootprint(fp)
121 # Then run the default SFM task. Results not checked
122 task.run(measCat, self.exp)
123 return source
125 def setUp(self):
126 """Make the image we'll measure.
127 """
129 self.exp = afwImage.ExposureF(100, 100)
130 psf = afwDetection.GaussianPsf(15, 15, 3.0)
131 self.exp.setPsf(psf)
132 self.I0, self.xcen, self.ycen = 1000.0, 50.5, 50.0
133 im = self.exp.getMaskedImage().getImage()
135 for i in (-1, 0, 1):
136 for j in (-1, 0, 1):
137 im[int(self.xcen) + i, int(self.ycen) + j, afwImage.LOCAL] = \
138 self.I0*(1 - 0.5*math.hypot(i - 0.5, j))
140 def testCentroider(self):
141 """Measure the centroid.
142 """
143 s = self.mySetup()
145 # this does not match exactly, and it used to
146 self.assertFloatsAlmostEqual(s.getCentroid(), lsst.geom.PointD(self.xcen, self.ycen), rtol=.01)
149class MemoryTester(lsst.utils.tests.MemoryTestCase):
150 pass
153def setup_module(module):
154 lsst.utils.tests.init()
157if __name__ == "__main__": 157 ↛ 158line 157 didn't jump to line 158, because the condition on line 157 was never true
158 lsst.utils.tests.init()
159 unittest.main()