Coverage for tests/test_coaddApCorrMap.py: 23%

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1# 

2# LSST Data Management System 

3# 

4# Copyright 2008-2016 AURA/LSST. 

5# 

6# This product includes software developed by the 

7# LSST Project (http://www.lsst.org/). 

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 LSST License Statement and 

20# the GNU General Public License along with this program. If not, 

21# see <https://www.lsstcorp.org/LegalNotices/>. 

22# 

23import os 

24import numpy as np 

25import unittest 

26 

27import lsst.geom 

28import lsst.afw.geom as afwGeom 

29import lsst.afw.math as afwMath 

30import lsst.afw.table as afwTable 

31import lsst.afw.image as afwImage 

32import lsst.meas.algorithms as measAlg 

33import lsst.utils.tests 

34 

35try: 

36 type(verbose) 

37except NameError: 

38 verbose = 0 

39 display = False 

40 

41 

42class CoaddApCorrMapTest(lsst.utils.tests.TestCase): 

43 

44 def testCoaddApCorrMap(self): 

45 """Check that we can create and use a coadd ApCorrMap.""" 

46 coaddBox = lsst.geom.Box2I(lsst.geom.Point2I(0, 0), lsst.geom.Extent2I(100, 100)) 

47 scale = 5.0e-5*lsst.geom.degrees 

48 cdMatrix = afwGeom.makeCdMatrix(scale=scale) 

49 crval = lsst.geom.SpherePoint(0.0, 0.0, lsst.geom.degrees) 

50 center = lsst.geom.Point2D(lsst.geom.Extent2D(coaddBox.getDimensions())*0.5) 

51 coaddWcs = afwGeom.makeSkyWcs(crpix=lsst.geom.Point2D(0, 0), crval=crval, cdMatrix=cdMatrix) 

52 schema = afwTable.ExposureTable.makeMinimalSchema() 

53 weightKey = schema.addField("customweightname", type="D", doc="Coadd weight") 

54 catalog = afwTable.ExposureCatalog(schema) 

55 

56 # Non-overlapping 

57 num = 5 

58 inputBox = lsst.geom.Box2I(lsst.geom.Point2I(0, 0), lsst.geom.Extent2I(10, 10)) 

59 validBox = lsst.geom.Box2I(lsst.geom.Point2I(0, 0), lsst.geom.Extent2I(7, 7)) 

60 pointList = [] 

61 pointListValid = [] 

62 

63 for i in range(num): 

64 value = np.array([[1]], dtype=float) # Constant with value = i+1 

65 apCorrMap = afwImage.ApCorrMap() 

66 bf = afwMath.ChebyshevBoundedField(inputBox, value*(i + 1)) 

67 apCorrMap.set("only", bf) 

68 

69 point = lsst.geom.Point2D(0, 0) - lsst.geom.Extent2D(coaddBox.getDimensions())*(i+0.5)/num 

70 wcs = afwGeom.makeSkyWcs(crpix=point, crval=crval, cdMatrix=cdMatrix) 

71 center = inputBox.getCenter() 

72 pointList.append(coaddWcs.skyToPixel(wcs.pixelToSky(center))) 

73 

74 # This point will only be valid for the second overlapping record 

75 pointValid = center + lsst.geom.Extent2D(4, 4) 

76 pointListValid.append(coaddWcs.skyToPixel(wcs.pixelToSky(pointValid))) 

77 

78 # A record with the valid polygon defining a limited region 

79 record = catalog.getTable().makeRecord() 

80 record.setWcs(wcs) 

81 record.setBBox(inputBox) 

82 record.setApCorrMap(apCorrMap) 

83 record.set(weightKey, i + 1) 

84 record['id'] = i 

85 record.setValidPolygon(afwGeom.Polygon(lsst.geom.Box2D(validBox))) 

86 catalog.append(record) 

87 

88 # An overlapping record with the whole region as valid 

89 record = catalog.getTable().makeRecord() 

90 record.setWcs(wcs) 

91 record.setBBox(inputBox) 

92 apCorrMap = afwImage.ApCorrMap() 

93 bf = afwMath.ChebyshevBoundedField(inputBox, value*(i + 2)) 

94 apCorrMap.set("only", bf) 

95 record.setApCorrMap(apCorrMap) 

96 record.set(weightKey, i + 2) 

97 record['id'] = i + num 

98 record.setValidPolygon(afwGeom.Polygon(lsst.geom.Box2D(inputBox))) 

99 catalog.append(record) 

100 

101 apCorrMap = measAlg.makeCoaddApCorrMap(catalog, coaddBox, coaddWcs, "customweightname") 

102 # This will test a point where both records contribute 

103 self.assertApCorrMap(apCorrMap, pointList) 

104 # Only the second record will be valid for this point 

105 self.assertApCorrMapValid(apCorrMap, pointListValid) 

106 

107 filename = os.path.join(os.path.dirname(os.path.realpath(__file__)), "coaddApCorrMap.fits") 

108 exposure = afwImage.ExposureF(1, 1) 

109 exposure.getInfo().setApCorrMap(apCorrMap) 

110 exposure.writeFits(filename) 

111 exposure = afwImage.ExposureF(filename) 

112 self.assertApCorrMap(exposure.getInfo().getApCorrMap(), pointList) 

113 self.assertApCorrMapValid(exposure.getInfo().getApCorrMap(), pointListValid) 

114 os.unlink(filename) 

115 

116 def assertApCorrMap(self, apCorrMap, pointList): 

117 for i, point in enumerate(pointList): 

118 weights = [i + 1, i + 2] 

119 values = [i + 1, i + 2] 

120 expected = sum((w*v for w, v in zip(weights, values)), 0.0)/sum(weights) 

121 actual = apCorrMap["only"].evaluate(point) 

122 self.assertEqual(actual, expected) 

123 

124 def assertApCorrMapValid(self, apCorrMap, pointList): 

125 for i, point in enumerate(pointList): 

126 weights = [i + 2] 

127 values = [i + 2] 

128 expected = sum((w*v for w, v in zip(weights, values)), 0.0)/sum(weights) 

129 actual = apCorrMap["only"].evaluate(point) 

130 self.assertEqual(actual, expected) 

131 

132 

133class TestMemory(lsst.utils.tests.MemoryTestCase): 

134 pass 

135 

136 

137def setup_module(module): 

138 lsst.utils.tests.init() 

139 

140 

141if __name__ == "__main__": 141 ↛ 142line 141 didn't jump to line 142, because the condition on line 141 was never true

142 lsst.utils.tests.init() 

143 unittest.main()