Coverage for python/lsst/afw/cameraGeom/cameraConfig.py: 74%

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1# This file is part of afw. 

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 

22__all__ = ["CameraConfig", "DetectorConfig"] 

23 

24import numpy as np 

25import lsst.pex.config as pexConfig 

26import lsst.geom as geom 

27from ._cameraGeom import Orientation 

28from ._transformConfig import TransformMapConfig 

29 

30 

31class DetectorConfig(pexConfig.Config): 

32 """A configuration that represents (and can be used to construct) a 

33 Detector. 

34 """ 

35 transformDict = pexConfig.ConfigField( 

36 "Dictionary of camera transforms keyed on the transform type.", TransformMapConfig) 

37 name = pexConfig.Field("Name of detector slot", str) 

38 id = pexConfig.Field("ID of detector slot", int) 

39 bbox_x0 = pexConfig.Field("x0 of pixel bounding box", int) 

40 bbox_y0 = pexConfig.Field("y0 of pixel bounding box", int) 

41 bbox_x1 = pexConfig.Field("x1 of pixel bounding box", int) 

42 bbox_y1 = pexConfig.Field("y1 of pixel bounding box", int) 

43 detectorType = pexConfig.Field( 

44 "Detector type: SCIENCE=0, FOCUS=1, GUIDER=2, WAVEFRONT=3", int) 

45 physicalType = pexConfig.Field( 

46 "How this specific detector is constructed; e.g. CCD, E2V, HgCdTe ", str, default="CCD") 

47 serial = pexConfig.Field( 

48 "Serial string associated with this specific detector", str) 

49 offset_x = pexConfig.Field( 

50 "x offset from the origin of the camera in mm in the transposed system.", float) 

51 offset_y = pexConfig.Field( 

52 "y offset from the origin of the camera in mm in the transposed system.", float) 

53 refpos_x = pexConfig.Field("x position of the reference point in the detector in pixels " 

54 "in transposed coordinates.", float) 

55 refpos_y = pexConfig.Field("y position of the reference point in the detector in pixels " 

56 "in transposed coordinates.", float) 

57 yawDeg = pexConfig.Field("yaw (rotation about z) of the detector in degrees. " 

58 "This includes any necessary rotation to go from " 

59 "detector coordinates to camera coordinates " 

60 "after optional transposition.", float) 

61 pitchDeg = pexConfig.Field( 

62 "pitch (rotation about y) of the detector in degrees", float) 

63 rollDeg = pexConfig.Field( 

64 "roll (rotation about x) of the detector in degrees", float) 

65 pixelSize_x = pexConfig.Field("Pixel size in the x dimension in mm", float) 

66 pixelSize_y = pexConfig.Field("Pixel size in the y dimension in mm", float) 

67 

68 # Depending on the choice of detector coordinates, the pixel grid may need 

69 # to be transposed before rotation to put it in camera coordinates. 

70 transposeDetector = pexConfig.Field( 

71 "Transpose the pixel grid before orienting in focal plane?", bool) 

72 

73 crosstalk = pexConfig.ListField( 

74 dtype=float, 

75 doc=("Flattened crosstalk coefficient matrix; should have nAmps x nAmps entries. " 

76 "Once 'reshape'-ed, ``coeffs[i][j]`` is the fraction of the j-th amp present on the i-th amp."), 

77 optional=True 

78 ) 

79 

80 # Accessors to get "compiled" versions of parameters. 

81 def getCrosstalk(self, numAmps): 

82 """Return a 2-D numpy array of crosstalk coefficients of the proper shape""" 

83 if not self.crosstalk: 

84 return None 

85 

86 if numAmps != int(np.sqrt(len(self.crosstalk))): 

87 numAmps = int(np.sqrt(len(self.crosstalk))) 

88 try: 

89 return np.array(self.crosstalk, dtype=np.float32).reshape((numAmps, numAmps)) 

90 except Exception as e: 

91 raise RuntimeError(f"Cannot reshape 'crosstalk' coefficients to square matrix: {e}") 

92 

93 @property 

94 def bbox(self): 

95 """Return the detector bounding box from the separate box endpoint 

96 values. 

97 """ 

98 return geom.BoxI(geom.PointI(self.bbox_x0, self.bbox_y0), 

99 geom.PointI(self.bbox_x1, self.bbox_y1)) 

100 

101 @property 

102 def offset(self): 

103 """Return the detector offset as a Point2D from the separate config 

104 values. 

105 """ 

106 return geom.Point2D(self.offset_x, self.offset_y) 

107 

108 @property 

109 def refPos(self): 

110 """Return the detector reference position as a Point2D from the 

111 separate config values. 

112 """ 

113 return geom.Point2D(self.refpos_x, self.refpos_y) 

114 

115 @property 

116 def orientation(self): 

117 """Return the cameraGeom.Orientation() object defined by the 

118 configuration values. 

119 """ 

120 return Orientation(self.offset, self.refPos, 

121 geom.Angle(self.yawDeg, geom.degrees), 

122 geom.Angle(self.pitchDeg, geom.degrees), 

123 geom.Angle(self.rollDeg, geom.degrees)) 

124 

125 @property 

126 def pixelSize(self): 

127 """Return the pixel size as an Extent2D from the separate values. 

128 """ 

129 return geom.Extent2D(self.pixelSize_x, self.pixelSize_y) 

130 

131 

132class CameraConfig(pexConfig.Config): 

133 """A configuration that represents (and can be used to construct) a Camera. 

134 """ 

135 detectorList = pexConfig.ConfigDictField( 

136 "List of detector configs", keytype=int, itemtype=DetectorConfig) 

137 transformDict = pexConfig.ConfigField( 

138 "Dictionary of camera transforms keyed on the transform type.", TransformMapConfig) 

139 name = pexConfig.Field("Name of this camera", str) 

140 

141 plateScale = pexConfig.Field( 

142 "Plate scale of the camera in arcsec/mm", float) 

143 # Note that the radial transform will also apply a scaling, so all coefficients should be 

144 # scaled by the plate scale in appropriate units 

145 radialCoeffs = pexConfig.ListField( 

146 "Coefficients for radial distortion", float)