Coverage for tests/test_centroid.py: 25%

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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/>. 

21 

22import math 

23import unittest 

24 

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 

32 

33try: 

34 type(verbose) 

35except NameError: 

36 display = False 

37 verbose = 0 

38 

39 

40class CentroidTestCase(utilsTests.TestCase): 

41 """A test case for centroiding. 

42 """ 

43 

44 def setUp(self): 

45 pass 

46 

47 def tearDown(self): 

48 pass 

49 

50 def testCleanup(self): 

51 """Test that tearDown does""" 

52 pass 

53 

54 def do_testAstrometry(self, alg, bkgd, control): 

55 """Test that we can instantiate and play with a centroiding algorithm. 

56 """ 

57 

58 schema = afwTable.SourceTable.makeMinimalSchema() 

59 schema.getAliasMap().set("slot_Centroid", "test") 

60 centroider = alg(control, "test", schema) 

61 table = afwTable.SourceCatalog(schema) 

62 

63 x0, y0 = 12345, 54321 

64 for imageFactory in (afwImage.MaskedImageF,): 

65 

66 im = imageFactory(lsst.geom.ExtentI(100, 100)) 

67 im.setXY0(lsst.geom.Point2I(x0, y0)) 

68 

69 # This fixed DoubleGaussianPsf replaces a computer generated one. 

70 # The values are not anything in particular, just a reasonable size. 

71 psf = afwDetection.GaussianPsf(15, 15, 3.0) 

72 exp = afwImage.makeExposure(im) 

73 exp.setPsf(psf) 

74 

75 im.set(bkgd) 

76 x, y = 30, 20 

77 im.image[x, y, afwImage.LOCAL] = 1010 

78 

79 source = table.addNew() 

80 spans = afwGeom.SpanSet(exp.getBBox(afwImage.LOCAL)) 

81 foot = afwDetection.Footprint(spans) 

82 foot.addPeak(x + x0, y + y0, 1010) 

83 source.setFootprint(foot) 

84 centroider.measure(source, exp) 

85 

86 self.assertFloatsAlmostEqual(x + x0, source.getX(), rtol=.00001) 

87 self.assertFloatsAlmostEqual(y + y0, source.getY(), rtol=.00001) 

88 self.assertFalse(source.get("test_flag")) 

89 

90 im.set(bkgd) 

91 im.image[10, 20, afwImage.LOCAL] = 1010 

92 im.image[10, 21, afwImage.LOCAL] = 1010 

93 im.image[11, 20, afwImage.LOCAL] = 1010 

94 im.image[11, 21, afwImage.LOCAL] = 1010 

95 

96 x, y = 10.5 + x0, 20.5 + y0 

97 source = table.addNew() 

98 source.set('test_x', x) 

99 source.set('test_y', y) 

100 centroider.measure(source, exp) 

101 self.assertFloatsAlmostEqual(x, source.getX(), rtol=.00001) 

102 self.assertFloatsAlmostEqual(y, source.getY(), rtol=.00001) 

103 self.assertFalse(source.get("test_flag")) 

104 

105 def testNaiveMeasureCentroid(self): 

106 """Test that we can instantiate and play with naive centroids. 

107 """ 

108 bkgd = 10.0 

109 afwTable.SourceTable.makeMinimalSchema() 

110 control = measBase.NaiveCentroidControl() 

111 control.background = bkgd 

112 control.doFootprintCheck = False 

113 # Test fails even with the default of 5 

114 control.maxDistToPeak = -1.0 

115 self.do_testAstrometry(measBase.NaiveCentroidAlgorithm, bkgd, control) 

116 

117 def testSdssMeasureCentroid(self): 

118 """Test that we can instantiate and play with SDSS centroids""" 

119 control = measBase.SdssCentroidControl() 

120 control.doFootprintCheck = False 

121 # Test fails with the default of 1, and even 5 

122 control.maxDistToPeak = -1.0 

123 self.do_testAstrometry(measBase.SdssCentroidAlgorithm, 10.0, control) 

124 

125 

126class SingleFrameMeasurementTaskTestCase(utilsTests.TestCase): 

127 """A test case for the SingleFrameMeasurementTask. 

128 """ 

129 

130 def mySetup(self): 

131 msConfig = measBase.SingleFrameMeasurementConfig() 

132 msConfig.algorithms.names = ["base_SdssCentroid"] 

133 msConfig.slots.centroid = "base_SdssCentroid" 

134 msConfig.slots.shape = None 

135 msConfig.slots.psfShape = None 

136 msConfig.slots.apFlux = None 

137 msConfig.slots.modelFlux = None 

138 msConfig.slots.psfFlux = None 

139 msConfig.slots.gaussianFlux = None 

140 msConfig.slots.calibFlux = None 

141 schema = afwTable.SourceTable.makeMinimalSchema() 

142 task = measBase.SingleFrameMeasurementTask(schema, config=msConfig) 

143 measCat = afwTable.SourceCatalog(schema) 

144 

145 source = measCat.addNew() 

146 spans = afwGeom.SpanSet(self.exp.getBBox(afwImage.LOCAL)) 

147 fp = afwDetection.Footprint(spans) 

148 fp.addPeak(50, 50, 1000.0) 

149 source.setFootprint(fp) 

150 # Then run the default SFM task. Results not checked 

151 task.run(measCat, self.exp) 

152 return source 

153 

154 def setUp(self): 

155 """Make the image we'll measure. 

156 """ 

157 

158 self.exp = afwImage.ExposureF(100, 100) 

159 psf = afwDetection.GaussianPsf(15, 15, 3.0) 

160 self.exp.setPsf(psf) 

161 self.I0, self.xcen, self.ycen = 1000.0, 50.5, 50.0 

162 im = self.exp.getMaskedImage().getImage() 

163 

164 for i in (-1, 0, 1): 

165 for j in (-1, 0, 1): 

166 im[int(self.xcen) + i, int(self.ycen) + j, afwImage.LOCAL] = \ 

167 self.I0*(1 - 0.5*math.hypot(i - 0.5, j)) 

168 

169 def tearDown(self): 

170 del self.exp 

171 

172 def testCentroider(self): 

173 """Measure the centroid. 

174 """ 

175 s = self.mySetup() 

176 

177 # this does not match exactly, and it used to 

178 self.assertFloatsAlmostEqual(s.getCentroid(), lsst.geom.PointD(self.xcen, self.ycen), rtol=.01) 

179 

180 

181class MemoryTester(lsst.utils.tests.MemoryTestCase): 

182 pass 

183 

184 

185def setup_module(module): 

186 lsst.utils.tests.init() 

187 

188 

189if __name__ == "__main__": 189 ↛ 190line 189 didn't jump to line 190, because the condition on line 189 was never true

190 lsst.utils.tests.init() 

191 unittest.main()