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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 unittest 

23 

24import numpy as np 

25 

26import lsst.geom 

27import lsst.afw.geom 

28import lsst.afw.detection 

29import lsst.afw.table 

30import lsst.meas.base.tests 

31import lsst.utils.tests 

32 

33 

34@lsst.meas.base.register("test_NoiseReplacer") 

35class NoiseReplacerTestPlugin(lsst.meas.base.SingleFramePlugin): 

36 """Plugin that sums instFlux inside and outside the source footprint. 

37 """ 

38 

39 @staticmethod 

40 def getExecutionOrder(): 

41 return 2.0 

42 

43 def __init__(self, config, name, schema, metadata): 

44 lsst.meas.base.SingleFramePlugin.__init__(self, config, name, schema, metadata) 

45 self.insideKey = schema.addField("%s_inside" % (name,), type=np.float64, 

46 doc="instFlux inside footprint") 

47 self.outsideKey = schema.addField("%s_outside" % (name,), type=np.float64, 

48 doc="instFlux outside footprint") 

49 

50 def measure(self, measRecord, exposure): 

51 footprint = measRecord.getFootprint() 

52 fullArray = exposure.getMaskedImage().getImage().getArray() 

53 insideArray = np.zeros(footprint.getArea(), dtype=fullArray.dtype) 

54 footprint.spans.flatten(insideArray, fullArray, exposure.getXY0()) 

55 insideFlux = float(insideArray.sum()) 

56 outsideFlux = float(fullArray.sum()) - insideFlux 

57 measRecord.set(self.insideKey, insideFlux) 

58 measRecord.set(self.outsideKey, outsideFlux) 

59 

60 

61class NoiseReplacerTestCase(lsst.meas.base.tests.AlgorithmTestCase, lsst.utils.tests.TestCase): 

62 

63 def setUp(self): 

64 self.bbox = lsst.geom.Box2I(lsst.geom.Point2I(-20, -30), 

65 lsst.geom.Extent2I(240, 260)) 

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

67 # first source is a point 

68 self.dataset.addSource(100000.0, lsst.geom.Point2D(50.1, 49.8)) 

69 # second source is extended 

70 self.dataset.addSource(120000.0, lsst.geom.Point2D(149.9, 50.3), 

71 lsst.afw.geom.Quadrupole(8, 9, 3)) 

72 with self.dataset.addBlend() as family: 

73 family.addChild(110000.0, lsst.geom.Point2D(65.2, 150.7), 

74 lsst.afw.geom.Quadrupole(7, 5, -1)) 

75 family.addChild(140000.0, lsst.geom.Point2D(72.3, 149.1)) 

76 family.addChild(90000.0, lsst.geom.Point2D(68.5, 156.9)) 

77 

78 def testSingleFrameMeasurement(self): 

79 """Test noise replacement in single frame measurement. 

80 

81 We compare the instFlux inside and outside source Footprints on an 

82 extremely high S/N image. 

83 """ 

84 

85 # We choose a random seed which causes the test to pass. 

86 task = self.makeSingleFrameMeasurementTask("test_NoiseReplacer") 

87 exposure, catalog = self.dataset.realize(1.0, task.schema, randomSeed=0) 

88 task.run(catalog, exposure) 

89 sumVariance = exposure.getMaskedImage().getVariance().getArray().sum() 

90 for record in catalog: 

91 self.assertFloatsAlmostEqual(record.get("test_NoiseReplacer_inside"), 

92 record.get("truth_instFlux"), rtol=1E-3) 

93 

94 # N.B. Next line checks that a random value is correct to a 

95 # statistical 1-sigma prediction; some RNG seeds may cause it to 

96 # fail (indeed, 67% should) 

97 self.assertLess(record.get("test_NoiseReplacer_outside"), np.sqrt(sumVariance)) 

98 

99 def tearDown(self): 

100 del self.bbox 

101 del self.dataset 

102 

103 

104class TestMemory(lsst.utils.tests.MemoryTestCase): 

105 pass 

106 

107 

108def setup_module(module): 

109 lsst.utils.tests.init() 

110 

111 

112if __name__ == "__main__": 112 ↛ 113line 112 didn't jump to line 113, because the condition on line 112 was never true

113 lsst.utils.tests.init() 

114 unittest.main()