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

# 

# LSST Data Management System 

# 

# Copyright 2008-2016 AURA/LSST. 

# 

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

# 

import unittest 

import numpy as np 

 

import lsst.utils.tests 

import lsst.afw.detection as afwDet 

import lsst.afw.geom as afwGeom 

import lsst.afw.image as afwImage 

from lsst.meas.deblender.baseline import deblend 

import lsst.meas.algorithms as measAlg 

 

 

def imExt(img): 

bbox = img.getBBox() 

return [bbox.getMinX(), bbox.getMaxX(), bbox.getMinY(), bbox.getMaxY()] 

 

 

def doubleGaussianPsf(W, H, fwhm1, fwhm2, a2): 

return measAlg.DoubleGaussianPsf(W, H, fwhm1, fwhm2, a2) 

 

 

def gaussianPsf(W, H, fwhm): 

return measAlg.DoubleGaussianPsf(W, H, fwhm) 

 

 

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

 

def testPeakRemoval(self): 

''' 

A simple example: three overlapping blobs (detected as 1 

footprint with three peaks). Additional peaks are added near 

the blob peaks that should be identified as degenerate. 

''' 

H, W = 100, 100 

 

fpbb = afwGeom.Box2I(afwGeom.Point2I(0, 0), afwGeom.Point2I(W - 1, H - 1)) 

 

afwimg = afwImage.MaskedImageF(fpbb) 

imgbb = afwimg.getBBox() 

img = afwimg.getImage().getArray() 

 

var = afwimg.getVariance().getArray() 

var[:, :] = 1. 

 

blob_fwhm = 10. 

blob_psf = doubleGaussianPsf(99, 99, blob_fwhm, 2.*blob_fwhm, 0.03) 

 

fakepsf_fwhm = 3. 

fakepsf = gaussianPsf(11, 11, fakepsf_fwhm) 

 

blobimgs = [] 

x = 75. 

XY = [(x, 35.), (x, 65.), (50., 50.)] 

flux = 1e6 

for x, y in XY: 

bim = blob_psf.computeImage(afwGeom.Point2D(x, y)) 

bbb = bim.getBBox() 

bbb.clip(imgbb) 

 

bim = bim.Factory(bim, bbb) 

bim2 = bim.getArray() 

 

blobimg = np.zeros_like(img) 

blobimg[bbb.getMinY():bbb.getMaxY()+1, bbb.getMinX():bbb.getMaxX()+1] += flux*bim2 

blobimgs.append(blobimg) 

 

img[bbb.getMinY():bbb.getMaxY()+1, 

bbb.getMinX():bbb.getMaxX()+1] += flux * bim2 

 

# Run the detection code to get a ~ realistic footprint 

thresh = afwDet.createThreshold(5., 'value', True) 

fpSet = afwDet.FootprintSet(afwimg, thresh, 'DETECTED', 1) 

fps = fpSet.getFootprints() 

 

self.assertTrue(len(fps) == 1) 

 

# Add new peaks near to the first peaks that will be degenerate 

fp0 = fps[0] 

for x, y in XY: 

fp0.addPeak(x - 10, y + 6, 10) 

 

deb = deblend(fp0, afwimg, fakepsf, fakepsf_fwhm, verbose=True, removeDegenerateTemplates=True) 

 

self.assertTrue(deb.deblendedParents[0].peaks[3].degenerate) 

self.assertTrue(deb.deblendedParents[0].peaks[4].degenerate) 

self.assertTrue(deb.deblendedParents[0].peaks[5].degenerate) 

 

 

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

pass 

 

 

def setup_module(module): 

lsst.utils.tests.init() 

 

 

118 ↛ 119line 118 didn't jump to line 119, because the condition on line 118 was never trueif __name__ == "__main__": 

lsst.utils.tests.init() 

unittest.main()