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1# 

2# LSST Data Management System 

3# Copyright 2008-2015 AURA/LSST. 

4# 

5# This product includes software developed by the 

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

7# 

8# This program is free software: you can redistribute it and/or modify 

9# it under the terms of the GNU General Public License as published by 

10# the Free Software Foundation, either version 3 of the License, or 

11# (at your option) any later version. 

12# 

13# This program is distributed in the hope that it will be useful, 

14# but WITHOUT ANY WARRANTY; without even the implied warranty of 

15# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 

16# GNU General Public License for more details. 

17# 

18# You should have received a copy of the LSST License Statement and 

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

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

21# 

22 

23""" 

24Tests setting of valid focal plane polygon intersection with ccd corners 

25 

26Run with: 

27 python testSetValidPolygonIntersect.py 

28or 

29 python 

30 >>> import testSetValidPolygonIntersect; testSetValidPolygonIntersect.run() 

31""" 

32 

33import unittest 

34 

35import numpy as np 

36 

37import lsst.utils.tests 

38import lsst.geom 

39import lsst.afw.geom as afwGeom 

40import lsst.afw.image as afwImage 

41from lsst.ip.isr.isrTask import IsrTask 

42from lsst.afw.cameraGeom.testUtils import DetectorWrapper 

43from lsst.afw.cameraGeom import PIXELS, FOCAL_PLANE 

44 

45 

46def makeCircularPolygon(fpCenterX, fpCenterY, fpRadius, numPolygonPoints): 

47 theta = np.linspace(0, 2*np.pi, num=numPolygonPoints, endpoint=False) 

48 xx = fpRadius*np.cos(theta) + fpCenterX 

49 yy = fpRadius*np.sin(theta) + fpCenterY 

50 points = np.array([xx, yy]).transpose() 

51 polygon = afwGeom.Polygon([lsst.geom.Point2D(x, y) for x, y in reversed(points)]) 

52 return polygon 

53 

54 

55def makeSquarePolygon(fpX0, fpY0, fpSize): 

56 xx = [fpX0, fpX0, fpX0 + fpSize - 1, fpX0 + fpSize - 1, fpX0] 

57 yy = [fpY0, fpY0 + fpSize - 1, fpY0 + fpSize - 1, fpY0, fpY0] 

58 points = np.array([xx, yy]).transpose() 

59 polygon = afwGeom.Polygon([lsst.geom.Point2D(x, y) for x, y in points]) 

60 return polygon 

61 

62 

63class SetValidPolygonIntersectTestCase(lsst.utils.tests.TestCase): 

64 """A test case for setting of valid focal plane polygon intersection with ccd corners """ 

65 

66 def testSetPolygonIntersect(self): 

67 # Create a detector 

68 detector = DetectorWrapper().detector 

69 numPolygonPoints = 50 

70 # Create an exposure with bounding box defined by detector 

71 exposure = afwImage.ExposureF(detector.getBBox()) 

72 exposure.setDetector(detector) 

73 

74 pixelSizeMm = exposure.getDetector().getPixelSize()[0] 

75 

76 pixX0 = exposure.getX0() 

77 pixY0 = exposure.getY0() 

78 pixX1 = pixX0 + exposure.getWidth() - 1 

79 pixY1 = pixY0 + exposure.getHeight() - 1 

80 

81 fpCenter = exposure.getDetector().getCenter(FOCAL_PLANE) 

82 fpCenterX = fpCenter[0] 

83 fpCenterY = fpCenter[1] 

84 pixCenter = exposure.getDetector().getCenter(PIXELS) 

85 

86 # Create an instance of IsrTask 

87 task = IsrTask() 

88 

89 # Make a polygon that encompases entire ccd (radius of 2*max of width/height) 

90 fpRadius = 2.0*max(exposure.getWidth()*pixelSizeMm, exposure.getHeight()*pixelSizeMm) 

91 fpPolygon = makeCircularPolygon(fpCenterX, fpCenterY, fpRadius, numPolygonPoints) 

92 # Set the polygon that is the intersection of fpPolygon and ccd 

93 task.setValidPolygonIntersect(exposure, fpPolygon) 

94 # Since the ccd is fully contained in the fpPolygon, the intersection should be the ccdPolygon itself 

95 ccdPolygonPix = afwGeom.Polygon(exposure.getDetector().getCorners(PIXELS)) 

96 self.assertEqual(exposure.getInfo().getValidPolygon(), ccdPolygonPix) 

97 

98 # Make a polygon that is entirely within, but smaller than, the ccd 

99 # (radius of 0.2*min of width/height) 

100 fpRadius = 0.2*min(exposure.getWidth()*pixelSizeMm, exposure.getHeight()*pixelSizeMm) 

101 fpPolygon = makeCircularPolygon(fpCenterX, fpCenterY, fpRadius, numPolygonPoints) 

102 # Set the polygon that is the intersection of fpPolygon and ccd 

103 task.setValidPolygonIntersect(exposure, fpPolygon) 

104 # all vertices of polygon should be contained within the ccd 

105 for x in exposure.getInfo().getValidPolygon(): 

106 self.assertTrue(ccdPolygonPix.contains(lsst.geom.Point2D(x))) 

107 # intersection is smaller than the ccd 

108 self.assertNotEqual(exposure.getInfo().getValidPolygon(), ccdPolygonPix) 

109 

110 # make a simple square polygon that partly intersects the ccd, centered at ccd center 

111 fpPolygonSize = max(exposure.getWidth()*pixelSizeMm, exposure.getHeight()*pixelSizeMm) 

112 fpPolygon = makeSquarePolygon(fpCenterX, fpCenterY, fpPolygonSize) 

113 task.setValidPolygonIntersect(exposure, fpPolygon) 

114 # Check that the polygon contains the central pixel (offset by one to actually be "contained") 

115 pixCenterPlusOne = lsst.geom.Point2D(pixCenter[0] + 1, pixCenter[1] + 1) 

116 self.assertTrue(exposure.getInfo().getValidPolygon().contains(lsst.geom.Point2D(pixCenterPlusOne))) 

117 # Check that the polygon contains the upper right ccd edge 

118 self.assertTrue(exposure.getInfo().getValidPolygon().contains(lsst.geom.Point2D(pixX1, pixY1))) 

119 

120 

121class MemoryTester(lsst.utils.tests.MemoryTestCase): 

122 pass 

123 

124 

125def setup_module(module): 

126 lsst.utils.tests.init() 

127 

128 

129if __name__ == "__main__": 129 ↛ 130line 129 didn't jump to line 130, because the condition on line 129 was never true

130 lsst.utils.tests.init() 

131 unittest.main()