Coverage for tests/test_exposure.py: 11%
672 statements
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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/>.
22"""
23Test lsst.afw.image.Exposure
24"""
26import dataclasses
27import os.path
28import unittest
30import numpy as np
31from numpy.testing import assert_allclose
32import yaml
33import astropy.units as units
35import lsst.utils
36import lsst.utils.tests
37import lsst.geom
38import lsst.afw.image as afwImage
39from lsst.afw.coord import Weather
40import lsst.afw.geom as afwGeom
41import lsst.afw.table as afwTable
42import lsst.pex.exceptions as pexExcept
43from lsst.afw.fits import readMetadata, FitsError
44from lsst.afw.cameraGeom.testUtils import DetectorWrapper
45from lsst.log import Log
46from testTableArchivesLib import DummyPsf
48Log.getLogger("lsst.afw.image.Mask").setLevel(Log.INFO)
50try:
51 dataDir = os.path.join(lsst.utils.getPackageDir("afwdata"), "data")
52except LookupError:
53 dataDir = None
54else:
55 InputMaskedImageName = "871034p_1_MI.fits"
56 InputMaskedImageNameSmall = "small_MI.fits"
57 InputImageNameSmall = "small"
58 OutputMaskedImageName = "871034p_1_MInew.fits"
60 currDir = os.path.abspath(os.path.dirname(__file__))
61 inFilePath = os.path.join(dataDir, InputMaskedImageName)
62 inFilePathSmall = os.path.join(dataDir, InputMaskedImageNameSmall)
63 inFilePathSmallImage = os.path.join(dataDir, InputImageNameSmall)
66@unittest.skipIf(dataDir is None, "afwdata not setup")
67class ExposureTestCase(lsst.utils.tests.TestCase):
68 """
69 A test case for the Exposure Class
70 """
72 def setUp(self):
73 maskedImage = afwImage.MaskedImageF(inFilePathSmall)
74 maskedImageMD = readMetadata(inFilePathSmall)
76 self.smallExposure = afwImage.ExposureF(inFilePathSmall)
77 self.width = maskedImage.getWidth()
78 self.height = maskedImage.getHeight()
79 self.wcs = afwGeom.makeSkyWcs(maskedImageMD, False)
80 self.md = maskedImageMD
81 self.psf = DummyPsf(2.0)
82 self.detector = DetectorWrapper().detector
83 self.id = 42
84 self.extras = {"MISC": DummyPsf(3.5)}
86 self.exposureBlank = afwImage.ExposureF()
87 self.exposureMiOnly = afwImage.makeExposure(maskedImage)
88 self.exposureMiWcs = afwImage.makeExposure(maskedImage, self.wcs)
89 # n.b. the (100, 100, ...) form
90 self.exposureCrWcs = afwImage.ExposureF(100, 100, self.wcs)
91 # test with ExtentI(100, 100) too
92 self.exposureCrOnly = afwImage.ExposureF(lsst.geom.ExtentI(100, 100))
94 def tearDown(self):
95 del self.smallExposure
96 del self.wcs
97 del self.psf
98 del self.detector
99 del self.extras
101 del self.exposureBlank
102 del self.exposureMiOnly
103 del self.exposureMiWcs
104 del self.exposureCrWcs
105 del self.exposureCrOnly
107 def testGetMaskedImage(self):
108 """
109 Test to ensure a MaskedImage can be obtained from each
110 Exposure. An Exposure is required to have a MaskedImage,
111 therefore each of the Exposures should return a MaskedImage.
113 MaskedImage class should throw appropriate
114 lsst::pex::exceptions::NotFound if the MaskedImage can not be
115 obtained.
116 """
117 maskedImageBlank = self.exposureBlank.getMaskedImage()
118 blankWidth = maskedImageBlank.getWidth()
119 blankHeight = maskedImageBlank.getHeight()
120 if blankWidth != blankHeight != 0:
121 self.fail(f"{blankWidth} = {blankHeight} != 0")
123 maskedImageMiOnly = self.exposureMiOnly.getMaskedImage()
124 miOnlyWidth = maskedImageMiOnly.getWidth()
125 miOnlyHeight = maskedImageMiOnly.getHeight()
126 self.assertAlmostEqual(miOnlyWidth, self.width)
127 self.assertAlmostEqual(miOnlyHeight, self.height)
129 # NOTE: Unittests for Exposures created from a MaskedImage and
130 # a WCS object are incomplete. No way to test the validity of
131 # the WCS being copied/created.
133 maskedImageMiWcs = self.exposureMiWcs.getMaskedImage()
134 miWcsWidth = maskedImageMiWcs.getWidth()
135 miWcsHeight = maskedImageMiWcs.getHeight()
136 self.assertAlmostEqual(miWcsWidth, self.width)
137 self.assertAlmostEqual(miWcsHeight, self.height)
139 maskedImageCrWcs = self.exposureCrWcs.getMaskedImage()
140 crWcsWidth = maskedImageCrWcs.getWidth()
141 crWcsHeight = maskedImageCrWcs.getHeight()
142 if crWcsWidth != crWcsHeight != 0:
143 self.fail(f"{crWcsWidth} != {crWcsHeight} != 0")
145 maskedImageCrOnly = self.exposureCrOnly.getMaskedImage()
146 crOnlyWidth = maskedImageCrOnly.getWidth()
147 crOnlyHeight = maskedImageCrOnly.getHeight()
148 if crOnlyWidth != crOnlyHeight != 0:
149 self.fail(f"{crOnlyWidth} != {crOnlyHeight} != 0")
151 # Check Exposure.getWidth() returns the MaskedImage's width
152 self.assertEqual(crOnlyWidth, self.exposureCrOnly.getWidth())
153 self.assertEqual(crOnlyHeight, self.exposureCrOnly.getHeight())
154 # check width/height properties
155 self.assertEqual(crOnlyWidth, self.exposureCrOnly.width)
156 self.assertEqual(crOnlyHeight, self.exposureCrOnly.height)
158 def testProperties(self):
159 self.assertMaskedImagesEqual(self.exposureMiOnly.maskedImage,
160 self.exposureMiOnly.getMaskedImage())
161 mi2 = afwImage.MaskedImageF(self.exposureMiOnly.getDimensions())
162 mi2.image.array[:] = 5.0
163 mi2.variance.array[:] = 3.0
164 mi2.mask.array[:] = 0x1
165 self.exposureMiOnly.maskedImage = mi2
166 self.assertMaskedImagesEqual(self.exposureMiOnly.maskedImage, mi2)
167 self.assertImagesEqual(self.exposureMiOnly.image,
168 self.exposureMiOnly.maskedImage.image)
170 image3 = afwImage.ImageF(self.exposureMiOnly.getDimensions())
171 image3.array[:] = 3.0
172 self.exposureMiOnly.image = image3
173 self.assertImagesEqual(self.exposureMiOnly.image, image3)
175 mask3 = afwImage.MaskX(self.exposureMiOnly.getDimensions())
176 mask3.array[:] = 0x2
177 self.exposureMiOnly.mask = mask3
178 self.assertMasksEqual(self.exposureMiOnly.mask, mask3)
180 var3 = afwImage.ImageF(self.exposureMiOnly.getDimensions())
181 var3.array[:] = 2.0
182 self.exposureMiOnly.variance = var3
183 self.assertImagesEqual(self.exposureMiOnly.variance, var3)
185 # Test the property getter for a null VisitInfo.
186 self.assertIsNone(self.exposureMiOnly.visitInfo)
188 def testGetWcs(self):
189 """Test that a WCS can be obtained from each Exposure created with
190 a WCS, and that an Exposure lacking a WCS returns None.
191 """
192 # These exposures don't contain a WCS
193 self.assertIsNone(self.exposureBlank.getWcs())
194 self.assertIsNone(self.exposureMiOnly.getWcs())
195 self.assertIsNone(self.exposureCrOnly.getWcs())
197 # These exposures should contain a WCS
198 self.assertEqual(self.wcs, self.exposureMiWcs.getWcs())
199 self.assertEqual(self.wcs, self.exposureCrWcs.getWcs())
201 def testExposureInfoConstructor(self):
202 """Test the Exposure(maskedImage, exposureInfo) constructor"""
203 exposureInfo = afwImage.ExposureInfo()
204 exposureInfo.setWcs(self.wcs)
205 exposureInfo.setDetector(self.detector)
206 gFilterLabel = afwImage.FilterLabel(band="g")
207 exposureInfo.setFilter(gFilterLabel)
208 maskedImage = afwImage.MaskedImageF(inFilePathSmall)
209 exposure = afwImage.ExposureF(maskedImage, exposureInfo)
211 self.assertTrue(exposure.hasWcs())
212 self.assertEqual(exposure.getWcs().getPixelOrigin(),
213 self.wcs.getPixelOrigin())
214 self.assertEqual(exposure.getDetector().getName(),
215 self.detector.getName())
216 self.assertEqual(exposure.getDetector().getSerial(),
217 self.detector.getSerial())
218 self.assertEqual(exposure.getFilter(), gFilterLabel)
220 self.assertTrue(exposure.getInfo().hasWcs())
221 # check the ExposureInfo property
222 self.assertTrue(exposure.info.hasWcs())
223 self.assertEqual(exposure.getInfo().getWcs().getPixelOrigin(),
224 self.wcs.getPixelOrigin())
225 self.assertEqual(exposure.getInfo().getDetector().getName(),
226 self.detector.getName())
227 self.assertEqual(exposure.getInfo().getDetector().getSerial(),
228 self.detector.getSerial())
229 self.assertEqual(exposure.getInfo().getFilter(), gFilterLabel)
231 def testNullWcs(self):
232 """Test that an Exposure constructed with second argument None is usable
234 When the exposureInfo constructor was first added, trying to get a WCS
235 or other info caused a segfault because the ExposureInfo did not exist.
236 """
237 maskedImage = self.exposureMiOnly.getMaskedImage()
238 exposure = afwImage.ExposureF(maskedImage, None)
239 self.assertFalse(exposure.hasWcs())
240 self.assertFalse(exposure.hasPsf())
242 def testExposureInfoSetNone(self):
243 exposureInfo = afwImage.ExposureInfo()
244 exposureInfo.setDetector(None)
245 exposureInfo.setValidPolygon(None)
246 exposureInfo.setPsf(None)
247 exposureInfo.setWcs(None)
248 exposureInfo.setPhotoCalib(None)
249 exposureInfo.setCoaddInputs(None)
250 exposureInfo.setVisitInfo(None)
251 exposureInfo.setApCorrMap(None)
252 for key in self.extras:
253 exposureInfo.setComponent(key, None)
255 def testSetExposureInfo(self):
256 exposureInfo = afwImage.ExposureInfo()
257 exposureInfo.setWcs(self.wcs)
258 exposureInfo.setDetector(self.detector)
259 gFilterLabel = afwImage.FilterLabel(band="g")
260 exposureInfo.setFilter(gFilterLabel)
261 exposureInfo.setId(self.id)
262 maskedImage = afwImage.MaskedImageF(inFilePathSmall)
263 exposure = afwImage.ExposureF(maskedImage)
264 self.assertFalse(exposure.hasWcs())
266 exposure.setInfo(exposureInfo)
268 self.assertTrue(exposure.hasWcs())
269 self.assertEqual(exposure.getWcs().getPixelOrigin(),
270 self.wcs.getPixelOrigin())
271 self.assertEqual(exposure.getDetector().getName(),
272 self.detector.getName())
273 self.assertEqual(exposure.getDetector().getSerial(),
274 self.detector.getSerial())
275 self.assertEqual(exposure.getFilter(), gFilterLabel)
277 # test properties
278 self.assertEqual(exposure.detector.getName(), self.detector.getName())
279 self.assertEqual(exposure.filter, gFilterLabel)
280 self.assertEqual(exposure.wcs, self.wcs)
282 def testVisitInfoFitsPersistence(self):
283 """Test saving an exposure to FITS and reading it back in preserves (some) VisitInfo fields"""
284 exposureId = 5
285 exposureTime = 12.3
286 boresightRotAngle = 45.6 * lsst.geom.degrees
287 weather = Weather(1.1, 2.2, 0.3)
288 visitInfo = afwImage.VisitInfo(
289 exposureId=exposureId,
290 exposureTime=exposureTime,
291 boresightRotAngle=boresightRotAngle,
292 weather=weather,
293 )
294 photoCalib = afwImage.PhotoCalib(3.4, 5.6)
295 exposureInfo = afwImage.ExposureInfo()
296 exposureInfo.setVisitInfo(visitInfo)
297 exposureInfo.setPhotoCalib(photoCalib)
298 exposureInfo.setDetector(self.detector)
299 gFilterLabel = afwImage.FilterLabel(band="g")
300 exposureInfo.setFilter(gFilterLabel)
301 maskedImage = afwImage.MaskedImageF(inFilePathSmall)
302 exposure = afwImage.ExposureF(maskedImage, exposureInfo)
303 with lsst.utils.tests.getTempFilePath(".fits") as tmpFile:
304 exposure.writeFits(tmpFile)
305 rtExposure = afwImage.ExposureF(tmpFile)
306 rtVisitInfo = rtExposure.getInfo().getVisitInfo()
307 self.assertEqual(rtVisitInfo.getWeather(), weather)
308 self.assertEqual(rtExposure.getPhotoCalib(), photoCalib)
309 self.assertEqual(rtExposure.getFilter(), gFilterLabel)
311 # Test property getters.
312 self.assertEqual(rtExposure.photoCalib, photoCalib)
313 self.assertEqual(rtExposure.filter, gFilterLabel)
314 # NOTE: we can't test visitInfo equality, because most fields are NaN.
315 self.assertIsNotNone(rtExposure.visitInfo)
317 def testSetMembers(self):
318 """
319 Test that the MaskedImage and the WCS of an Exposure can be set.
320 """
321 exposure = afwImage.ExposureF()
323 maskedImage = afwImage.MaskedImageF(inFilePathSmall)
324 exposure.setMaskedImage(maskedImage)
325 exposure.setWcs(self.wcs)
326 exposure.setDetector(self.detector)
327 exposure.setFilter(afwImage.FilterLabel(band="g"))
329 self.assertEqual(exposure.getDetector().getName(),
330 self.detector.getName())
331 self.assertEqual(exposure.getDetector().getSerial(),
332 self.detector.getSerial())
333 self.assertEqual(exposure.getFilter().bandLabel, "g")
334 self.assertEqual(exposure.getWcs(), self.wcs)
336 # The PhotoCalib tests are in test_photoCalib.py;
337 # here we just check that it's gettable and settable.
338 self.assertIsNone(exposure.getPhotoCalib())
340 photoCalib = afwImage.PhotoCalib(511.1, 44.4)
341 exposure.setPhotoCalib(photoCalib)
342 self.assertEqual(exposure.getPhotoCalib(), photoCalib)
344 # Psfs next
345 self.assertFalse(exposure.hasPsf())
346 exposure.setPsf(self.psf)
347 self.assertTrue(exposure.hasPsf())
349 exposure.setPsf(DummyPsf(1.0)) # we can reset the Psf
351 # extras next
352 info = exposure.getInfo()
353 for key, value in self.extras.items():
354 self.assertFalse(info.hasComponent(key))
355 self.assertIsNone(info.getComponent(key))
356 info.setComponent(key, value)
357 self.assertTrue(info.hasComponent(key))
358 self.assertEqual(info.getComponent(key), value)
359 info.removeComponent(key)
360 self.assertFalse(info.hasComponent(key))
362 # Test that we can set the MaskedImage and WCS of an Exposure
363 # that already has both
364 self.exposureMiWcs.setMaskedImage(maskedImage)
365 exposure.setWcs(self.wcs)
367 def testHasWcs(self):
368 """
369 Test if an Exposure has a WCS or not.
370 """
371 self.assertFalse(self.exposureBlank.hasWcs())
373 self.assertFalse(self.exposureMiOnly.hasWcs())
374 self.assertTrue(self.exposureMiWcs.hasWcs())
375 self.assertTrue(self.exposureCrWcs.hasWcs())
376 self.assertFalse(self.exposureCrOnly.hasWcs())
378 def testGetSubExposure(self):
379 """
380 Test that a subExposure of the original Exposure can be obtained.
382 The MaskedImage class should throw a
383 lsst::pex::exceptions::InvalidParameter if the requested
384 subRegion is not fully contained within the original
385 MaskedImage.
387 """
388 #
389 # This subExposure is valid
390 #
391 subBBox = lsst.geom.Box2I(lsst.geom.Point2I(40, 50),
392 lsst.geom.Extent2I(10, 10))
393 subExposure = self.exposureCrWcs.Factory(
394 self.exposureCrWcs, subBBox, afwImage.LOCAL)
396 self.checkWcs(self.exposureCrWcs, subExposure)
398 # this subRegion is not valid and should trigger an exception
399 # from the MaskedImage class and should trigger an exception
400 # from the WCS class for the MaskedImage 871034p_1_MI.
402 subRegion3 = lsst.geom.Box2I(lsst.geom.Point2I(100, 100),
403 lsst.geom.Extent2I(10, 10))
405 def getSubRegion():
406 self.exposureCrWcs.Factory(
407 self.exposureCrWcs, subRegion3, afwImage.LOCAL)
409 self.assertRaises(pexExcept.LengthError, getSubRegion)
411 # this subRegion is not valid and should trigger an exception
412 # from the MaskedImage class only for the MaskedImage small_MI.
413 # small_MI (cols, rows) = (256, 256)
415 subRegion4 = lsst.geom.Box2I(lsst.geom.Point2I(250, 250),
416 lsst.geom.Extent2I(10, 10))
418 def getSubRegion():
419 self.exposureCrWcs.Factory(
420 self.exposureCrWcs, subRegion4, afwImage.LOCAL)
422 self.assertRaises(pexExcept.LengthError, getSubRegion)
424 # check the sub- and parent- exposures are using the same Wcs
425 # transformation
426 subBBox = lsst.geom.Box2I(lsst.geom.Point2I(40, 50),
427 lsst.geom.Extent2I(10, 10))
428 subExposure = self.exposureCrWcs.Factory(
429 self.exposureCrWcs, subBBox, afwImage.LOCAL)
430 parentSkyPos = self.exposureCrWcs.getWcs().pixelToSky(0, 0)
432 subExpSkyPos = subExposure.getWcs().pixelToSky(0, 0)
434 self.assertSpherePointsAlmostEqual(parentSkyPos, subExpSkyPos, msg="Wcs in sub image has changed")
436 def testReadWriteFits(self):
437 """Test readFits and writeFits.
438 """
439 # This should pass without an exception
440 mainExposure = afwImage.ExposureF(inFilePathSmall)
441 mainExposure.info.setId(self.id)
442 mainExposure.setDetector(self.detector)
444 subBBox = lsst.geom.Box2I(lsst.geom.Point2I(10, 10),
445 lsst.geom.Extent2I(40, 50))
446 subExposure = mainExposure.Factory(
447 mainExposure, subBBox, afwImage.LOCAL)
448 self.checkWcs(mainExposure, subExposure)
449 det = subExposure.getDetector()
450 self.assertTrue(det)
452 subExposure = afwImage.ExposureF(
453 inFilePathSmall, subBBox, afwImage.LOCAL)
455 self.checkWcs(mainExposure, subExposure)
457 # This should throw an exception
458 def getExposure():
459 afwImage.ExposureF(inFilePathSmallImage)
461 self.assertRaises(FitsError, getExposure)
463 mainExposure.setPsf(self.psf)
465 # Make sure we can write without an exception
466 photoCalib = afwImage.PhotoCalib(1e-10, 1e-12)
467 mainExposure.setPhotoCalib(photoCalib)
469 mainInfo = mainExposure.getInfo()
470 for key, value in self.extras.items():
471 mainInfo.setComponent(key, value)
473 with lsst.utils.tests.getTempFilePath(".fits") as tmpFile:
474 mainExposure.writeFits(tmpFile)
476 readExposure = type(mainExposure)(tmpFile)
478 #
479 # Check the round-tripping
480 #
481 self.assertIsNotNone(mainExposure.getFilter())
482 self.assertEqual(mainExposure.getFilter(),
483 readExposure.getFilter())
485 self.assertEqual(photoCalib, readExposure.getPhotoCalib())
487 readInfo = readExposure.getInfo()
488 self.assertEqual(mainExposure.info.getId(), readInfo.id)
489 for key, value in self.extras.items():
490 self.assertEqual(value, readInfo.getComponent(key))
492 psf = readExposure.getPsf()
493 self.assertIsNotNone(psf)
494 self.assertEqual(psf, self.psf)
495 # check psf property getter
496 self.assertEqual(readExposure.psf, self.psf)
498 def checkWcs(self, parentExposure, subExposure):
499 """Compare WCS at corner points of a sub-exposure and its parent exposure
500 By using the function indexToPosition, we should be able to convert the indices
501 (of the four corners (of the sub-exposure)) to positions and use the wcs
502 to get the same sky coordinates for each.
503 """
504 subMI = subExposure.getMaskedImage()
505 subDim = subMI.getDimensions()
507 # Note: pixel positions must be computed relative to XY0 when working
508 # with WCS
509 mainWcs = parentExposure.getWcs()
510 subWcs = subExposure.getWcs()
512 for xSubInd in (0, subDim.getX()-1):
513 for ySubInd in (0, subDim.getY()-1):
514 self.assertSpherePointsAlmostEqual(
515 mainWcs.pixelToSky(
516 afwImage.indexToPosition(xSubInd),
517 afwImage.indexToPosition(ySubInd),
518 ),
519 subWcs.pixelToSky(
520 afwImage.indexToPosition(xSubInd),
521 afwImage.indexToPosition(ySubInd),
522 ))
524 def cmpExposure(self, e1, e2):
525 self.assertEqual(e1.getDetector().getName(),
526 e2.getDetector().getName())
527 self.assertEqual(e1.getDetector().getSerial(),
528 e2.getDetector().getSerial())
529 self.assertEqual(e1.getFilter(), e2.getFilter())
530 xy = lsst.geom.Point2D(0, 0)
531 self.assertEqual(e1.getWcs().pixelToSky(xy)[0],
532 e2.getWcs().pixelToSky(xy)[0])
533 self.assertEqual(e1.getPhotoCalib(), e2.getPhotoCalib())
534 # check PSF identity
535 if not e1.getPsf():
536 self.assertFalse(e2.getPsf())
537 else:
538 self.assertEqual(e1.getPsf(), e2.getPsf())
539 # Check extra components
540 i1 = e1.getInfo()
541 i2 = e2.getInfo()
542 for key in self.extras:
543 self.assertEqual(i1.hasComponent(key), i2.hasComponent(key))
544 if i1.hasComponent(key):
545 self.assertEqual(i1.getComponent(key), i2.getComponent(key))
547 def testCopyExposure(self):
548 """Copy an Exposure (maybe changing type)"""
550 exposureU = afwImage.ExposureU(inFilePathSmall, allowUnsafe=True)
551 exposureU.setWcs(self.wcs)
552 exposureU.setDetector(self.detector)
553 exposureU.setFilter(afwImage.FilterLabel(band="g"))
554 exposureU.setPsf(DummyPsf(4.0))
555 infoU = exposureU.getInfo()
556 for key, value in self.extras.items():
557 infoU.setComponent(key, value)
559 exposureF = exposureU.convertF()
560 self.cmpExposure(exposureF, exposureU)
562 nexp = exposureF.Factory(exposureF, False)
563 self.cmpExposure(exposureF, nexp)
565 # Ensure that the copy was deep.
566 # (actually this test is invalid since getDetector() returns a shared_ptr)
567 # cen0 = exposureU.getDetector().getCenterPixel()
568 # x0,y0 = cen0
569 # det = exposureF.getDetector()
570 # det.setCenterPixel(lsst.geom.Point2D(999.0, 437.8))
571 # self.assertEqual(exposureU.getDetector().getCenterPixel()[0], x0)
572 # self.assertEqual(exposureU.getDetector().getCenterPixel()[1], y0)
574 def testDeepCopyData(self):
575 """Make sure a deep copy of an Exposure has its own data (ticket #2625)
576 """
577 exp = afwImage.ExposureF(6, 7)
578 mi = exp.getMaskedImage()
579 mi.getImage().set(100)
580 mi.getMask().set(5)
581 mi.getVariance().set(200)
583 expCopy = exp.clone()
584 miCopy = expCopy.getMaskedImage()
585 miCopy.getImage().set(-50)
586 miCopy.getMask().set(2)
587 miCopy.getVariance().set(175)
589 self.assertFloatsAlmostEqual(miCopy.getImage().getArray(), -50)
590 self.assertTrue(np.all(miCopy.getMask().getArray() == 2))
591 self.assertFloatsAlmostEqual(miCopy.getVariance().getArray(), 175)
593 self.assertFloatsAlmostEqual(mi.getImage().getArray(), 100)
594 self.assertTrue(np.all(mi.getMask().getArray() == 5))
595 self.assertFloatsAlmostEqual(mi.getVariance().getArray(), 200)
597 def testDeepCopySubData(self):
598 """Make sure a deep copy of a subregion of an Exposure has its own data (ticket #2625)
599 """
600 exp = afwImage.ExposureF(6, 7)
601 mi = exp.getMaskedImage()
602 mi.getImage().set(100)
603 mi.getMask().set(5)
604 mi.getVariance().set(200)
606 bbox = lsst.geom.Box2I(lsst.geom.Point2I(1, 0), lsst.geom.Extent2I(5, 4))
607 expCopy = exp.Factory(exp, bbox, afwImage.PARENT, True)
608 miCopy = expCopy.getMaskedImage()
609 miCopy.getImage().set(-50)
610 miCopy.getMask().set(2)
611 miCopy.getVariance().set(175)
613 self.assertFloatsAlmostEqual(miCopy.getImage().getArray(), -50)
614 self.assertTrue(np.all(miCopy.getMask().getArray() == 2))
615 self.assertFloatsAlmostEqual(miCopy.getVariance().getArray(), 175)
617 self.assertFloatsAlmostEqual(mi.getImage().getArray(), 100)
618 self.assertTrue(np.all(mi.getMask().getArray() == 5))
619 self.assertFloatsAlmostEqual(mi.getVariance().getArray(), 200)
621 def testDeepCopyMetadata(self):
622 """Make sure a deep copy of an Exposure has a deep copy of metadata (ticket #2568)
623 """
624 exp = afwImage.ExposureF(10, 10)
625 expMeta = exp.getMetadata()
626 expMeta.set("foo", 5)
627 expCopy = exp.clone()
628 expCopyMeta = expCopy.getMetadata()
629 expCopyMeta.set("foo", 6)
630 self.assertEqual(expCopyMeta.getScalar("foo"), 6)
631 # this will fail if the bug is present
632 self.assertEqual(expMeta.getScalar("foo"), 5)
634 def testDeepCopySubMetadata(self):
635 """Make sure a deep copy of a subregion of an Exposure has a deep copy of metadata (ticket #2568)
636 """
637 exp = afwImage.ExposureF(10, 10)
638 expMeta = exp.getMetadata()
639 expMeta.set("foo", 5)
640 bbox = lsst.geom.Box2I(lsst.geom.Point2I(1, 0), lsst.geom.Extent2I(5, 5))
641 expCopy = exp.Factory(exp, bbox, afwImage.PARENT, True)
642 expCopyMeta = expCopy.getMetadata()
643 expCopyMeta.set("foo", 6)
644 self.assertEqual(expCopyMeta.getScalar("foo"), 6)
645 # this will fail if the bug is present
646 self.assertEqual(expMeta.getScalar("foo"), 5)
648 def testMakeExposureLeaks(self):
649 """Test for memory leaks in makeExposure (the test is in lsst.utils.tests.MemoryTestCase)"""
650 afwImage.makeMaskedImage(afwImage.ImageU(lsst.geom.Extent2I(10, 20)))
651 afwImage.makeExposure(afwImage.makeMaskedImage(
652 afwImage.ImageU(lsst.geom.Extent2I(10, 20))))
654 def testImageSlices(self):
655 """Test image slicing, which generate sub-images using Box2I under the covers"""
656 exp = afwImage.ExposureF(10, 20)
657 mi = exp.getMaskedImage()
658 mi.image[9, 19] = 10
659 # N.b. Exposures don't support setting/getting the pixels so can't
660 # replicate e.g. Image's slice tests
661 sexp = exp[1:4, 6:10]
662 self.assertEqual(sexp.getDimensions(), lsst.geom.ExtentI(3, 4))
663 sexp = exp[:, -3:, afwImage.LOCAL]
664 self.assertEqual(sexp.getDimensions(),
665 lsst.geom.ExtentI(exp.getWidth(), 3))
666 self.assertEqual(sexp.maskedImage[-1, -1, afwImage.LOCAL],
667 exp.maskedImage[-1, -1, afwImage.LOCAL])
669 def testConversionToScalar(self):
670 """Test that even 1-pixel Exposures can't be converted to scalars"""
671 im = afwImage.ExposureF(10, 20)
673 # only single pixel images may be converted
674 self.assertRaises(TypeError, float, im)
675 # actually, can't convert (img, msk, var) to scalar
676 self.assertRaises(TypeError, float, im[0, 0])
678 def testReadMetadata(self):
679 with lsst.utils.tests.getTempFilePath(".fits") as tmpFile:
680 self.exposureCrWcs.getMetadata().set("FRAZZLE", True)
681 # This will write the main metadata (inc. FRAZZLE) to the primary HDU, and the
682 # WCS to subsequent HDUs, along with INHERIT=T.
683 self.exposureCrWcs.writeFits(tmpFile)
684 # This should read the first non-empty HDU (i.e. it skips the primary), but
685 # goes back and reads it if it finds INHERIT=T. That should let us read
686 # frazzle and the Wcs from the PropertySet returned by
687 # testReadMetadata.
688 md = readMetadata(tmpFile)
689 wcs = afwGeom.makeSkyWcs(md, False)
690 self.assertPairsAlmostEqual(wcs.getPixelOrigin(), self.wcs.getPixelOrigin())
691 self.assertSpherePointsAlmostEqual(wcs.getSkyOrigin(), self.wcs.getSkyOrigin())
692 assert_allclose(wcs.getCdMatrix(), self.wcs.getCdMatrix(), atol=1e-10)
693 frazzle = md.getScalar("FRAZZLE")
694 self.assertTrue(frazzle)
696 def testArchiveKeys(self):
697 with lsst.utils.tests.getTempFilePath(".fits") as tmpFile:
698 exposure1 = afwImage.ExposureF(100, 100, self.wcs)
699 exposure1.setPsf(self.psf)
700 exposure1.writeFits(tmpFile)
701 exposure2 = afwImage.ExposureF(tmpFile)
702 self.assertFalse(exposure2.getMetadata().exists("AR_ID"))
703 self.assertFalse(exposure2.getMetadata().exists("PSF_ID"))
704 self.assertFalse(exposure2.getMetadata().exists("WCS_ID"))
706 def testTicket2861(self):
707 with lsst.utils.tests.getTempFilePath(".fits") as tmpFile:
708 exposure1 = afwImage.ExposureF(100, 100, self.wcs)
709 exposure1.setPsf(self.psf)
710 schema = afwTable.ExposureTable.makeMinimalSchema()
711 coaddInputs = afwImage.CoaddInputs(schema, schema)
712 exposure1.getInfo().setCoaddInputs(coaddInputs)
713 exposure2 = afwImage.ExposureF(exposure1, True)
714 self.assertIsNotNone(exposure2.getInfo().getCoaddInputs())
715 exposure2.writeFits(tmpFile)
716 exposure3 = afwImage.ExposureF(tmpFile)
717 self.assertIsNotNone(exposure3.getInfo().getCoaddInputs())
719 def testGetCutout(self):
720 wcs = self.smallExposure.getWcs()
722 dimensions = [lsst.geom.Extent2I(100, 50), lsst.geom.Extent2I(15, 15), lsst.geom.Extent2I(0, 10),
723 lsst.geom.Extent2I(25, 30), lsst.geom.Extent2I(15, -5),
724 2*self.smallExposure.getDimensions()]
725 locations = [("center", self._getExposureCenter(self.smallExposure)),
726 ("edge", wcs.pixelToSky(lsst.geom.Point2D(0, 0))),
727 ("rounding test", wcs.pixelToSky(lsst.geom.Point2D(0.2, 0.7))),
728 ("just inside", wcs.pixelToSky(lsst.geom.Point2D(-0.5 + 1e-4, -0.5 + 1e-4))),
729 ("just outside", wcs.pixelToSky(lsst.geom.Point2D(-0.5 - 1e-4, -0.5 - 1e-4))),
730 ("outside", wcs.pixelToSky(lsst.geom.Point2D(-1000, -1000)))]
731 for cutoutSize in dimensions:
732 for label, cutoutCenter in locations:
733 msg = 'Cutout size = %s, location = %s' % (cutoutSize, label)
734 if "outside" not in label and all(cutoutSize.gt(0)):
735 cutout = self.smallExposure.getCutout(cutoutCenter, cutoutSize)
736 centerInPixels = wcs.skyToPixel(cutoutCenter)
737 precision = (1 + 1e-4)*np.sqrt(0.5)*wcs.getPixelScale(centerInPixels)
738 self._checkCutoutProperties(cutout, cutoutSize, cutoutCenter, precision, msg)
739 self._checkCutoutPixels(
740 cutout,
741 self._getValidCorners(self.smallExposure.getBBox(), cutout.getBBox()),
742 msg)
744 # Need a valid WCS
745 with self.assertRaises(pexExcept.LogicError, msg=msg):
746 self.exposureMiOnly.getCutout(cutoutCenter, cutoutSize)
747 else:
748 with self.assertRaises(pexExcept.InvalidParameterError, msg=msg):
749 self.smallExposure.getCutout(cutoutCenter, cutoutSize)
751 def testGetConvexPolygon(self):
752 """Test the convex polygon."""
753 # Check that we do not have a convex polygon for the plain exposure.
754 self.assertIsNone(self.exposureMiOnly.convex_polygon)
756 # Check that all the points in the padded bounding box are in the polygon
757 bbox = self.exposureMiWcs.getBBox()
758 # Grow by the default padding.
759 bbox.grow(10)
760 x, y = np.meshgrid(np.arange(bbox.getBeginX(), bbox.getEndX(), dtype=np.float64),
761 np.arange(bbox.getBeginY(), bbox.getEndY(), dtype=np.float64))
762 wcs = self.exposureMiWcs.wcs
763 ra, dec = wcs.pixelToSkyArray(x.ravel(),
764 y.ravel())
766 poly = self.exposureMiWcs.convex_polygon
767 contains = poly.contains(ra, dec)
768 np.testing.assert_array_equal(contains, np.ones(len(contains), dtype=bool))
770 # Check that points one pixel outside of the bounding box are not in the polygon
771 bbox.grow(1)
773 ra, dec = wcs.pixelToSkyArray(
774 np.linspace(bbox.getBeginX(), bbox.getEndX(), 100),
775 np.full(100, bbox.getBeginY()))
776 contains = poly.contains(ra, dec)
777 np.testing.assert_array_equal(contains, np.zeros(len(contains), dtype=bool))
779 ra, dec = wcs.pixelToSkyArray(
780 np.linspace(bbox.getBeginX(), bbox.getEndX(), 100),
781 np.full(100, bbox.getEndY()))
782 contains = poly.contains(ra, dec)
783 np.testing.assert_array_equal(contains, np.zeros(len(contains), dtype=bool))
785 ra, dec = wcs.pixelToSkyArray(
786 np.full(100, bbox.getBeginX()),
787 np.linspace(bbox.getBeginY(), bbox.getEndY(), 100))
788 contains = poly.contains(ra, dec)
789 np.testing.assert_array_equal(contains, np.zeros(len(contains), dtype=bool))
791 ra, dec = wcs.pixelToSkyArray(
792 np.full(100, bbox.getEndX()),
793 np.linspace(bbox.getBeginY(), bbox.getEndY(), 100))
794 contains = poly.contains(ra, dec)
795 np.testing.assert_array_equal(contains, np.zeros(len(contains), dtype=bool))
797 def testContainsSkyCoords(self):
798 """Test the sky coord containment code."""
799 self.assertRaisesRegex(ValueError,
800 "Exposure does not have a valid WCS",
801 self.exposureMiOnly.containsSkyCoords,
802 0.0,
803 0.0)
805 # Check that all the points within the bounding box are contained
806 bbox = self.exposureMiWcs.getBBox()
807 x, y = np.meshgrid(np.arange(bbox.getBeginX() + 1, bbox.getEndX() - 1),
808 np.arange(bbox.getBeginY() + 1, bbox.getEndY() - 1))
809 wcs = self.exposureMiWcs.wcs
810 ra, dec = wcs.pixelToSkyArray(x.ravel().astype(np.float64),
811 y.ravel().astype(np.float64))
813 contains = self.exposureMiWcs.containsSkyCoords(ra*units.radian,
814 dec*units.radian)
815 np.testing.assert_array_equal(contains, np.ones(len(contains), dtype=bool))
817 # Same test, everything in degrees.
818 ra, dec = wcs.pixelToSkyArray(x.ravel().astype(np.float64),
819 y.ravel().astype(np.float64),
820 degrees=True)
822 contains = self.exposureMiWcs.containsSkyCoords(ra*units.degree,
823 dec*units.degree)
824 np.testing.assert_array_equal(contains, np.ones(len(contains), dtype=bool))
826 # Prepend and append some positions out of the box.
827 ra = np.concatenate(([300.0], ra, [180.]))
828 dec = np.concatenate(([50.0], dec, [50.0]))
830 contains = self.exposureMiWcs.containsSkyCoords(ra*units.degree,
831 dec*units.degree)
832 compare = np.ones(len(contains), dtype=bool)
833 compare[0] = False
834 compare[-1] = False
835 np.testing.assert_array_equal(contains, compare)
837 def _checkCutoutProperties(self, cutout, size, center, precision, msg):
838 """Test whether a cutout has the desired size and position.
840 Parameters
841 ----------
842 cutout : `lsst.afw.image.Exposure`
843 The cutout to test.
844 size : `lsst.geom.Extent2I`
845 The expected dimensions of ``cutout``.
846 center : `lsst.geom.SpherePoint`
847 The expected center of ``cutout``.
848 precision : `lsst.geom.Angle`
849 The precision to which ``center`` must match.
850 msg : `str`
851 An error message suffix describing test parameters.
852 """
853 newCenter = self._getExposureCenter(cutout)
854 self.assertIsNotNone(cutout, msg=msg)
855 self.assertSpherePointsAlmostEqual(newCenter, center, maxSep=precision, msg=msg)
856 self.assertEqual(cutout.getWidth(), size[0], msg=msg)
857 self.assertEqual(cutout.getHeight(), size[1], msg=msg)
859 def _checkCutoutPixels(self, cutout, validCorners, msg):
860 """Test whether a cutout has valid/empty pixels where expected.
862 Parameters
863 ----------
864 cutout : `lsst.afw.image.Exposure`
865 The cutout to test.
866 validCorners : iterable of `lsst.geom.Point2I`
867 The corners of ``cutout`` that should be drawn from the original image.
868 msg : `str`
869 An error message suffix describing test parameters.
870 """
871 mask = cutout.getMaskedImage().getMask()
872 edgeMask = mask.getPlaneBitMask("NO_DATA")
874 for corner in cutout.getBBox().getCorners():
875 maskBitsSet = mask[corner] & edgeMask
876 if corner in validCorners:
877 self.assertEqual(maskBitsSet, 0, msg=msg)
878 else:
879 self.assertEqual(maskBitsSet, edgeMask, msg=msg)
881 def _getExposureCenter(self, exposure):
882 """Return the sky coordinates of an Exposure's center.
884 Parameters
885 ----------
886 exposure : `lsst.afw.image.Exposure`
887 The image whose center is desired.
889 Returns
890 -------
891 center : `lsst.geom.SpherePoint`
892 The position at the center of ``exposure``.
893 """
894 return exposure.getWcs().pixelToSky(lsst.geom.Box2D(exposure.getBBox()).getCenter())
896 def _getValidCorners(self, imageBox, cutoutBox):
897 """Return the corners of a cutout that are constrained by the original image.
899 Parameters
900 ----------
901 imageBox: `lsst.geom.Extent2I`
902 The bounding box of the original image.
903 cutoutBox : `lsst.geom.Box2I`
904 The bounding box of the cutout.
906 Returns
907 -------
908 corners : iterable of `lsst.geom.Point2I`
909 The corners that are drawn from the original image.
910 """
911 return [corner for corner in cutoutBox.getCorners() if corner in imageBox]
914class ExposureInfoTestCase(lsst.utils.tests.TestCase):
915 def setUp(self):
916 super().setUp()
918 self.wcs = afwGeom.makeSkyWcs(lsst.geom.Point2D(0.0, 0.0),
919 lsst.geom.SpherePoint(2.0, 34.0, lsst.geom.degrees),
920 np.identity(2),
921 )
922 self.photoCalib = afwImage.PhotoCalib(1.5)
923 self.psf = DummyPsf(2.0)
924 self.detector = DetectorWrapper().detector
925 self.summaryStats = afwImage.ExposureSummaryStats(ra=100.0)
926 self.polygon = afwGeom.Polygon(lsst.geom.Box2D(lsst.geom.Point2D(0.0, 0.0),
927 lsst.geom.Point2D(25.0, 20.0)))
928 self.coaddInputs = afwImage.CoaddInputs()
929 self.apCorrMap = afwImage.ApCorrMap()
930 self.transmissionCurve = afwImage.TransmissionCurve.makeIdentity()
932 self.exposureInfo = afwImage.ExposureInfo()
933 self.gFilterLabel = afwImage.FilterLabel(band="g")
934 self.exposureId = 42
936 def _checkAlias(self, exposureInfo, key, value, has, get):
937 self.assertFalse(has())
938 self.assertFalse(exposureInfo.hasComponent(key))
939 self.assertIsNone(get())
940 self.assertIsNone(exposureInfo.getComponent(key))
942 self.exposureInfo.setComponent(key, value)
943 self.assertTrue(has())
944 self.assertTrue(exposureInfo.hasComponent(key))
945 self.assertIsNotNone(get())
946 self.assertIsNotNone(exposureInfo.getComponent(key))
947 self.assertEqual(get(), value)
948 self.assertEqual(exposureInfo.getComponent(key), value)
950 self.exposureInfo.removeComponent(key)
951 self.assertFalse(has())
952 self.assertFalse(exposureInfo.hasComponent(key))
953 self.assertIsNone(get())
954 self.assertIsNone(exposureInfo.getComponent(key))
956 def testAliases(self):
957 cls = type(self.exposureInfo)
958 self._checkAlias(self.exposureInfo, cls.KEY_WCS, self.wcs,
959 self.exposureInfo.hasWcs, self.exposureInfo.getWcs)
960 self._checkAlias(self.exposureInfo, cls.KEY_PSF, self.psf,
961 self.exposureInfo.hasPsf, self.exposureInfo.getPsf)
962 self._checkAlias(self.exposureInfo, cls.KEY_PHOTO_CALIB, self.photoCalib,
963 self.exposureInfo.hasPhotoCalib, self.exposureInfo.getPhotoCalib)
964 self._checkAlias(self.exposureInfo, cls.KEY_DETECTOR, self.detector,
965 self.exposureInfo.hasDetector, self.exposureInfo.getDetector)
966 self._checkAlias(self.exposureInfo, cls.KEY_VALID_POLYGON, self.polygon,
967 self.exposureInfo.hasValidPolygon, self.exposureInfo.getValidPolygon)
968 self._checkAlias(self.exposureInfo, cls.KEY_COADD_INPUTS, self.coaddInputs,
969 self.exposureInfo.hasCoaddInputs, self.exposureInfo.getCoaddInputs)
970 self._checkAlias(self.exposureInfo, cls.KEY_AP_CORR_MAP, self.apCorrMap,
971 self.exposureInfo.hasApCorrMap, self.exposureInfo.getApCorrMap)
972 self._checkAlias(self.exposureInfo, cls.KEY_TRANSMISSION_CURVE, self.transmissionCurve,
973 self.exposureInfo.hasTransmissionCurve, self.exposureInfo.getTransmissionCurve)
974 self._checkAlias(self.exposureInfo, cls.KEY_SUMMARY_STATS, self.summaryStats,
975 self.exposureInfo.hasSummaryStats, self.exposureInfo.getSummaryStats)
976 self._checkAlias(self.exposureInfo, cls.KEY_FILTER, self.gFilterLabel,
977 self.exposureInfo.hasFilter, self.exposureInfo.getFilter)
979 def testId(self):
980 self.exposureInfo.setVisitInfo(afwImage.VisitInfo())
982 self.assertFalse(self.exposureInfo.hasId())
983 self.assertIsNone(self.exposureInfo.getId())
984 with self.assertWarns(FutureWarning):
985 self.assertEqual(self.exposureInfo.getVisitInfo().getExposureId(), 0)
986 self.assertIsNone(self.exposureInfo.id)
988 self.exposureInfo.setId(self.exposureId)
989 self.assertTrue(self.exposureInfo.hasId())
990 self.assertIsNotNone(self.exposureInfo.getId())
991 self.assertIsNotNone(self.exposureInfo.id)
992 self.assertEqual(self.exposureInfo.getId(), self.exposureId)
993 with self.assertWarns(FutureWarning):
994 self.assertEqual(self.exposureInfo.getVisitInfo().getExposureId(), self.exposureId)
995 self.assertEqual(self.exposureInfo.id, self.exposureId)
997 self.exposureInfo.id = 99899
998 self.assertEqual(self.exposureInfo.getId(), 99899)
1000 self.exposureInfo.setVisitInfo(afwImage.VisitInfo(exposureId=12321))
1001 self.assertEqual(self.exposureInfo.id, 12321)
1003 self.exposureInfo.id = None
1004 self.assertFalse(self.exposureInfo.hasId())
1005 self.assertIsNone(self.exposureInfo.getId())
1006 self.assertIsNone(self.exposureInfo.id)
1008 def testCopy(self):
1009 # Test that ExposureInfos have independently settable state
1010 copy = afwImage.ExposureInfo(self.exposureInfo, True)
1011 self.assertEqual(self.exposureInfo.getWcs(), copy.getWcs())
1013 newWcs = afwGeom.makeSkyWcs(lsst.geom.Point2D(-23.0, 8.0),
1014 lsst.geom.SpherePoint(0.0, 0.0, lsst.geom.degrees),
1015 np.identity(2),
1016 )
1017 copy.setWcs(newWcs)
1018 self.assertEqual(copy.getWcs(), newWcs)
1019 self.assertNotEqual(self.exposureInfo.getWcs(), copy.getWcs())
1021 def testMissingProperties(self):
1022 # Test that invalid properties return None instead of raising
1023 exposureInfo = afwImage.ExposureInfo()
1025 self.assertIsNone(exposureInfo.id)
1028class ExposureNoAfwdataTestCase(lsst.utils.tests.TestCase):
1029 """Tests of Exposure that don't require afwdata.
1031 These tests use the trivial exposures written to ``afw/tests/data``.
1032 """
1033 def setUp(self):
1034 self.dataDir = os.path.join(os.path.split(__file__)[0], "data")
1036 # Check the values below against what was written by comparing with
1037 # the code in `afw/tests/data/makeTestExposure.py`
1038 nx = ny = 10
1039 image = afwImage.ImageF(np.arange(nx*ny, dtype='f').reshape(nx, ny))
1040 variance = afwImage.ImageF(np.ones((nx, ny), dtype='f'))
1041 mask = afwImage.MaskX(nx, ny)
1042 mask.array[5, 5] = 5
1043 self.maskedImage = afwImage.MaskedImageF(image, mask, variance)
1044 self.exposureId = 12345
1046 self.v0PhotoCalib = afwImage.makePhotoCalibFromCalibZeroPoint(1e6, 2e4)
1047 self.v1PhotoCalib = afwImage.PhotoCalib(1e6, 2e4)
1048 self.v1FilterLabel = afwImage.FilterLabel(physical="ha")
1049 self.v2FilterLabel = afwImage.FilterLabel(band="N656", physical="ha")
1051 def testReadUnversioned(self):
1052 """Test that we can read an unversioned (implicit verison 0) file.
1053 """
1054 filename = os.path.join(self.dataDir, "exposure-noversion.fits")
1055 exposure = afwImage.ExposureF.readFits(filename)
1057 self.assertMaskedImagesEqual(exposure.maskedImage, self.maskedImage)
1059 self.assertEqual(exposure.info.id, self.exposureId)
1060 with self.assertWarns(FutureWarning):
1061 self.assertEqual(exposure.info.getVisitInfo().getExposureId(), self.exposureId)
1062 self.assertEqual(exposure.getPhotoCalib(), self.v0PhotoCalib)
1063 self.assertEqual(exposure.getFilter(), self.v1FilterLabel)
1065 def testReadVersion0(self):
1066 """Test that we can read a version 0 file.
1067 This file should be identical to the unversioned one, except that it
1068 is marked as ExposureInfo version 0 in the header.
1069 """
1070 filename = os.path.join(self.dataDir, "exposure-version-0.fits")
1071 exposure = afwImage.ExposureF.readFits(filename)
1073 self.assertMaskedImagesEqual(exposure.maskedImage, self.maskedImage)
1075 self.assertEqual(exposure.info.id, self.exposureId)
1076 with self.assertWarns(FutureWarning):
1077 self.assertEqual(exposure.info.getVisitInfo().getExposureId(), self.exposureId)
1078 self.assertEqual(exposure.getPhotoCalib(), self.v0PhotoCalib)
1079 self.assertEqual(exposure.getFilter(), self.v1FilterLabel)
1081 # Check that the metadata reader parses the file correctly
1082 reader = afwImage.ExposureFitsReader(filename)
1083 self.assertEqual(reader.readExposureInfo().getPhotoCalib(), self.v0PhotoCalib)
1084 self.assertEqual(reader.readPhotoCalib(), self.v0PhotoCalib)
1086 def testReadVersion1(self):
1087 """Test that we can read a version 1 file.
1088 Version 1 replaced Calib with PhotoCalib.
1089 """
1090 filename = os.path.join(self.dataDir, "exposure-version-1.fits")
1091 exposure = afwImage.ExposureF.readFits(filename)
1093 self.assertMaskedImagesEqual(exposure.maskedImage, self.maskedImage)
1095 self.assertEqual(exposure.info.id, self.exposureId)
1096 with self.assertWarns(FutureWarning):
1097 self.assertEqual(exposure.info.getVisitInfo().getExposureId(), self.exposureId)
1098 self.assertEqual(exposure.getPhotoCalib(), self.v1PhotoCalib)
1099 self.assertEqual(exposure.getFilter(), self.v1FilterLabel)
1101 # Check that the metadata reader parses the file correctly
1102 reader = afwImage.ExposureFitsReader(filename)
1103 self.assertEqual(reader.readExposureInfo().getPhotoCalib(), self.v1PhotoCalib)
1104 self.assertEqual(reader.readPhotoCalib(), self.v1PhotoCalib)
1106 def testReadVersion2(self):
1107 """Test that we can read a version 2 file.
1108 Version 2 replaced Filter with FilterLabel.
1109 """
1110 filename = os.path.join(self.dataDir, "exposure-version-2.fits")
1111 exposure = afwImage.ExposureF.readFits(filename)
1113 self.assertMaskedImagesEqual(exposure.maskedImage, self.maskedImage)
1115 self.assertEqual(exposure.info.id, self.exposureId)
1116 with self.assertWarns(FutureWarning):
1117 self.assertEqual(exposure.info.getVisitInfo().getExposureId(), self.exposureId)
1118 self.assertEqual(exposure.getPhotoCalib(), self.v1PhotoCalib)
1119 self.assertEqual(exposure.getFilter(), self.v2FilterLabel)
1121 # Check that the metadata reader parses the file correctly
1122 reader = afwImage.ExposureFitsReader(filename)
1123 self.assertEqual(reader.readExposureInfo().getPhotoCalib(), self.v1PhotoCalib)
1124 self.assertEqual(reader.readPhotoCalib(), self.v1PhotoCalib)
1126 def testExposureSummaryExtraComponents(self):
1127 """Test that we can read an exposure summary with extra components.
1128 """
1129 testDict = {'ra': 0.0,
1130 'dec': 0.0,
1131 'nonsense': 1.0}
1132 bytes = yaml.dump(testDict, encoding='utf-8')
1133 with self.assertWarns(FutureWarning):
1134 summaryStats = lsst.afw.image.ExposureSummaryStats._read(bytes)
1136 self.assertEqual(summaryStats.ra, testDict['ra'])
1137 self.assertEqual(summaryStats.dec, testDict['dec'])
1139 def testExposureSummarySchema(self):
1140 """Test that we can make a schema for an exposure summary and populate
1141 records with that schema.
1142 """
1143 schema = afwTable.Schema()
1144 afwImage.ExposureSummaryStats.update_schema(schema)
1145 self.maxDiff = None
1146 self.assertEqual(
1147 {field.name for field in dataclasses.fields(afwImage.ExposureSummaryStats)},
1148 set(schema.getNames()) | {"version"},
1149 )
1150 catalog = afwTable.BaseCatalog(schema)
1151 summary1 = afwImage.ExposureSummaryStats()
1152 for n, field in enumerate(dataclasses.fields(afwImage.ExposureSummaryStats)):
1153 # Set fields to deterministic, distinct, but arbitrary values.
1154 if field.type == "float":
1155 setattr(summary1, field.name, float(0.5**n))
1156 elif field.type == "int":
1157 setattr(summary1, field.name, 10*n)
1158 elif field.type == "list[float]":
1159 setattr(summary1, field.name, [n + 0.1, n + 0.2, n + 0.3, n + 0.4])
1160 else:
1161 raise TypeError(f"Unexpected type: {field.type!r}.")
1162 record = catalog.addNew()
1163 summary1.update_record(record)
1164 summary2 = afwImage.ExposureSummaryStats.from_record(record)
1165 self.assertEqual(summary1, summary2)
1168class MemoryTester(lsst.utils.tests.MemoryTestCase):
1169 pass
1172def setup_module(module):
1173 lsst.utils.tests.init()
1176if __name__ == "__main__": 1176 ↛ 1177line 1176 didn't jump to line 1177, because the condition on line 1176 was never true
1177 lsst.utils.tests.init()
1178 unittest.main()