Hide keyboard shortcuts

Hot-keys on this page

r m x p   toggle line displays

j k   next/prev highlighted chunk

0   (zero) top of page

1   (one) first highlighted chunk

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

74

75

76

77

78

79

80

81

82

83

84

85

86

87

88

89

90

91

92

93

94

95

96

97

98

99

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

# 

# LSST Data Management System 

# Copyright 2008-2016 LSST Corporation. 

# 

# 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 os 

import unittest 

 

 

import lsst.utils.tests 

import lsst.utils 

import lsst.afw.geom as afwGeom 

import lsst.afw.image as afwImage 

import lsst.afw.math as afwMath 

import lsst.ip.diffim as ipDiffim 

import lsst.log.utils as logUtils 

 

verbosity = 3 

logUtils.traceSetAt("ip.diffim", verbosity) 

 

# known input images 

try: 

defDataDir = lsst.utils.getPackageDir('afwdata') 

except Exception: 

defDataDir = None 

 

 

# This one tests convolve and subtract 

class DiffimTestCases(lsst.utils.tests.TestCase): 

 

# D = I - (K.x.T + bg) 

 

def setUp(self): 

self.config = ipDiffim.ImagePsfMatchTask.ConfigClass() 

self.config.kernel.name = "AL" 

self.subconfig = self.config.kernel.active 

self.kSize = self.subconfig.kernelSize 

 

# gaussian reference kernel 

self.gSize = self.kSize 

self.gaussFunction = afwMath.GaussianFunction2D(2, 3) 

self.gaussKernel = afwMath.AnalyticKernel(self.gSize, self.gSize, self.gaussFunction) 

 

if defDataDir: 

defImagePath = os.path.join(defDataDir, "DC3a-Sim", "sci", "v5-e0", 

"v5-e0-c011-a00.sci.fits") 

self.templateImage = afwImage.MaskedImageF(defImagePath) 

self.scienceImage = self.templateImage.Factory(self.templateImage.getDimensions()) 

 

afwMath.convolve(self.scienceImage, self.templateImage, self.gaussKernel, False) 

 

def tearDown(self): 

del self.subconfig 

del self.gaussFunction 

del self.gaussKernel 

if defDataDir: 

del self.templateImage 

del self.scienceImage 

 

def runConvolveAndSubtract1(self, bgVal=0, xloc=408, yloc=580): 

imsize = int(5 * self.kSize) 

 

p0 = afwGeom.Point2I(xloc - imsize//2, yloc - imsize//2) 

p1 = afwGeom.Point2I(xloc + imsize//2, yloc + imsize//2) 

bbox = afwGeom.Box2I(p0, p1) 

 

tmi = afwImage.MaskedImageF(self.templateImage, bbox, origin=afwImage.LOCAL) 

smi = afwImage.MaskedImageF(self.scienceImage, bbox, origin=afwImage.LOCAL) 

diffIm = ipDiffim.convolveAndSubtract(tmi, smi, self.gaussKernel, bgVal) 

 

bbox = self.gaussKernel.shrinkBBox(diffIm.getBBox(origin=afwImage.LOCAL)) 

diffIm2 = afwImage.MaskedImageF(diffIm, bbox, origin=afwImage.LOCAL) 

 

# image is empty (or the additional background you subtracted off) 

for j in range(diffIm2.getHeight()): 

for i in range(diffIm2.getWidth()): 

self.assertAlmostEqual(diffIm2.getImage().get(i, j), -1.*bgVal, 3) 

 

def runConvolveAndSubtract2(self, bgOrder=0, xloc=408, yloc=580): 

imsize = int(5 * self.kSize) 

 

p0 = afwGeom.Point2I(xloc - imsize//2, yloc - imsize//2) 

p1 = afwGeom.Point2I(xloc + imsize//2, yloc + imsize//2) 

bbox = afwGeom.Box2I(p0, p1) 

 

tmi = afwImage.MaskedImageF(self.templateImage, bbox, origin=afwImage.LOCAL) 

smi = afwImage.MaskedImageF(self.scienceImage, bbox, origin=afwImage.LOCAL) 

bgFunc = afwMath.PolynomialFunction2D(bgOrder) # coeffs are 0. by default 

diffIm = ipDiffim.convolveAndSubtract(tmi, smi, self.gaussKernel, bgFunc) 

 

bbox = self.gaussKernel.shrinkBBox(diffIm.getBBox(origin=afwImage.LOCAL)) 

diffIm2 = afwImage.MaskedImageF(diffIm, bbox, origin=afwImage.LOCAL) 

for j in range(diffIm2.getHeight()): 

for i in range(diffIm2.getWidth()): 

self.assertAlmostEqual(diffIm2.getImage().get(i, j), 0., 4) 

 

@unittest.skipIf(not defDataDir, "Warning: afwdata is not set up") 

def testConvolveAndSubtract(self): 

self.runConvolveAndSubtract1(bgVal=0) 

self.runConvolveAndSubtract1(bgVal=10) 

# this one uses a function 

self.runConvolveAndSubtract2(bgOrder=0) 

self.runConvolveAndSubtract2(bgOrder=2) 

 

##### 

 

 

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

pass 

 

 

def setup_module(module): 

lsst.utils.tests.init() 

 

 

132 ↛ 133line 132 didn't jump to line 133, because the condition on line 132 was never trueif __name__ == "__main__": 

lsst.utils.tests.init() 

unittest.main()