#
# LSST Data Management System
# Copyright 2008-2017 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.geom
import lsst.afw.geom
import lsst.meas.base
import lsst.meas.base.tests
import lsst.utils.tests
class SdssShapeTestCase(lsst.meas.base.tests.AlgorithmTestCase, lsst.utils.tests.TestCase):
def setUp(self):
self.bbox = lsst.geom.Box2I(lsst.geom.Point2I(-20, -30),
lsst.geom.Extent2I(240, 160))
self.dataset = lsst.meas.base.tests.TestDataset(self.bbox)
# first source is a point
self.dataset.addSource(100000.0, lsst.geom.Point2D(50.1, 49.8))
# second source is extended
self.dataset.addSource(100000.0, lsst.geom.Point2D(149.9, 50.3),
lsst.afw.geom.Quadrupole(8, 9, 3))
self.config = self.makeSingleFrameMeasurementConfig("base_SdssShape")
def tearDown(self):
del self.bbox
del self.dataset
del self.config
def assertFinite(self, value):
self.assertTrue(np.isfinite(value), msg="%s is not finite" % (value,))
def _runMeasurementTask(self):
task = self.makeSingleFrameMeasurementTask("base_SdssShape", config=self.config)
exposure, catalog = self.dataset.realize(10.0, task.schema, randomSeed=0)
task.run(catalog, exposure)
return exposure, catalog
def _checkShape(self, result, record):
self.assertFloatsAlmostEqual(result.x, record.get("truth_x"), rtol=1E-2)
self.assertFloatsAlmostEqual(result.y, record.get("truth_y"), rtol=1E-2)
self.assertFloatsAlmostEqual(result.xx, record.get("truth_xx"), rtol=1E-2)
self.assertFloatsAlmostEqual(result.yy, record.get("truth_yy"), rtol=1E-2)
self.assertFloatsAlmostEqual(result.xy, record.get("truth_xy"), rtol=1E-1, atol=2E-1)
self.assertFinite(result.xxErr)
self.assertFinite(result.yyErr)
self.assertFinite(result.xyErr)
self.assertFinite(result.instFlux_xx_Cov)
self.assertFinite(result.instFlux_yy_Cov)
self.assertFinite(result.instFlux_xy_Cov)
self.assertFinite(result.xx_yy_Cov)
self.assertFinite(result.xx_xy_Cov)
self.assertFinite(result.yy_xy_Cov)
self.assertFalse(result.getFlag(lsst.meas.base.SdssShapeAlgorithm.FAILURE.number))
self.assertFalse(result.getFlag(lsst.meas.base.SdssShapeAlgorithm.UNWEIGHTED_BAD.number))
self.assertFalse(result.getFlag(lsst.meas.base.SdssShapeAlgorithm.UNWEIGHTED.number))
self.assertFalse(result.getFlag(lsst.meas.base.SdssShapeAlgorithm.SHIFT.number))
self.assertFalse(result.getFlag(lsst.meas.base.SdssShapeAlgorithm.MAXITER.number))
def _checkPsfShape(self, result, psfResult, psfTruth):
self.assertFloatsAlmostEqual(psfResult.getIxx(), psfTruth.getIxx(), rtol=1E-4)
self.assertFloatsAlmostEqual(psfResult.getIyy(), psfTruth.getIyy(), rtol=1E-4)
self.assertFloatsAlmostEqual(psfResult.getIxy(), psfTruth.getIxy(), rtol=1E-4)
self.assertFalse(result.getFlag(lsst.meas.base.SdssShapeAlgorithm.PSF_SHAPE_BAD.number))
def testMeasureGoodPsf(self):
"""Test that we measure shapes and record the PSF shape correctly
Note: Given that the PSF model here is constant over the entire image, this test
would not catch an error in the potition at which base_SdssShape_psf is computed.
Such a test requires a spatially varying PSF model such that different locations
can be distinguished by their different PSF model shapes. Such a test exists in
meas_algorithms (tests/testSdssShapePsf.py), making use of the PcaPsf algorithm
to build the spatially varying PSF.
"""
exposure, catalog = self._runMeasurementTask()
key = lsst.meas.base.SdssShapeResultKey(catalog.schema["base_SdssShape"])
psfTruth = exposure.getPsf().computeShape()
for record in catalog:
result = record.get(key)
self._checkShape(result, record)
psfResult = key.getPsfShape(record)
self._checkPsfShape(result, psfResult, psfTruth)
def testMeasureWithoutPsf(self):
"""Test that we measure shapes correctly and do not record the PSF shape when not needed."""
self.config.plugins["base_SdssShape"].doMeasurePsf = False
_, catalog = self._runMeasurementTask()
key = lsst.meas.base.SdssShapeResultKey(catalog.schema["base_SdssShape"])
for record in catalog:
result = record.get(key)
self._checkShape(result, record)
self.assertNotIn("base_SdssShape_psf_xx", catalog.schema)
self.assertNotIn("base_SdssShape_psf_yy", catalog.schema)
self.assertNotIn("base_SdssShape_psf_xy", catalog.schema)
self.assertNotIn("base_SdssShape_flag_psf", catalog.schema)
def testMeasureBadPsf(self):
"""Test that we measure shapes correctly and set a flag with the PSF is unavailable."""
self.config.plugins["base_SdssShape"].doMeasurePsf = True
task = self.makeSingleFrameMeasurementTask("base_SdssShape", config=self.config)
exposure, catalog = self.dataset.realize(10.0, task.schema, randomSeed=1)
exposure.setPsf(None) # Set PSF to None to test no PSF case
task.run(catalog, exposure)
key = lsst.meas.base.SdssShapeResultKey(catalog.schema["base_SdssShape"])
for record in catalog:
result = record.get(key)
self._checkShape(result, record)
self.assertTrue(result.getFlag(lsst.meas.base.SdssShapeAlgorithm.PSF_SHAPE_BAD.number))
class SdssShapeTransformTestCase(lsst.meas.base.tests.FluxTransformTestCase,
lsst.meas.base.tests.CentroidTransformTestCase,
lsst.meas.base.tests.SingleFramePluginTransformSetupHelper,
lsst.utils.tests.TestCase):
name = "sdssShape"
controlClass = lsst.meas.base.SdssShapeControl
algorithmClass = lsst.meas.base.SdssShapeAlgorithm
transformClass = lsst.meas.base.SdssShapeTransform
flagNames = ("flag", "flag_unweighted", "flag_unweightedBad", "flag_shift", "flag_maxIter")
singleFramePlugins = ('base_SdssShape',)
forcedPlugins = ('base_SdssShape',)
testPsf = True
def _setFieldsInRecords(self, records, name):
lsst.meas.base.tests.FluxTransformTestCase._setFieldsInRecords(self, records, name)
lsst.meas.base.tests.CentroidTransformTestCase._setFieldsInRecords(self, records, name)
for record in records:
for field in ('xx', 'yy', 'xy', 'xxErr', 'yyErr', 'xyErr', 'psf_xx', 'psf_yy', 'psf_xy'):
if record.schema.join(name, field) in record.schema:
record[record.schema.join(name, field)] = np.random.random()
def _compareFieldsInRecords(self, inSrc, outSrc, name):
lsst.meas.base.tests.FluxTransformTestCase._compareFieldsInRecords(self, inSrc, outSrc, name)
lsst.meas.base.tests.CentroidTransformTestCase._compareFieldsInRecords(self, inSrc, outSrc, name)
inShape = lsst.meas.base.ShapeResultKey(inSrc.schema[name]).get(inSrc)
outShape = lsst.meas.base.ShapeResultKey(outSrc.schema[name]).get(outSrc)
centroid = lsst.meas.base.CentroidResultKey(inSrc.schema[name]).get(inSrc).getCentroid()
xform = self.calexp.getWcs().linearizePixelToSky(centroid, lsst.geom.radians)
trInShape = inShape.getShape().transform(xform.getLinear())
self.assertEqual(trInShape.getIxx(), outShape.getShape().getIxx())
self.assertEqual(trInShape.getIyy(), outShape.getShape().getIyy())
self.assertEqual(trInShape.getIxy(), outShape.getShape().getIxy())
m = lsst.meas.base.makeShapeTransformMatrix(xform.getLinear())
np.testing.assert_array_almost_equal(
np.dot(np.dot(m, inShape.getShapeErr()), m.transpose()), outShape.getShapeErr()
)
if self.testPsf:
inPsfShape = lsst.meas.base.ShapeResultKey(
inSrc.schema[inSrc.schema.join(name, "psf")]
).get(inSrc)
outPsfShape = lsst.meas.base.ShapeResultKey(
outSrc.schema[outSrc.schema.join(name, "psf")]
).get(outSrc)
trInPsfShape = inPsfShape.getShape().transform(xform.getLinear())
self.assertEqual(trInPsfShape.getIxx(), outPsfShape.getShape().getIxx())
self.assertEqual(trInPsfShape.getIyy(), outPsfShape.getShape().getIyy())
self.assertEqual(trInPsfShape.getIxy(), outPsfShape.getShape().getIxy())
else:
self.assertNotIn(inSrc.schema.join(name, "psf", "xx"), inSrc.schema)
self.assertNotIn(inSrc.schema.join(name, "flag", "psf"), inSrc.schema)
class PsfSdssShapeTransformTestCase(SdssShapeTransformTestCase, lsst.utils.tests.TestCase):
testPsf = False
def makeSdssShapeControl(self):
ctrl = lsst.meas.base.SdssShapeControl()
ctrl.doMeasurePsf = False
return ctrl
controlClass = makeSdssShapeControl
class TestMemory(lsst.utils.tests.MemoryTestCase):
pass
def setup_module(module):
lsst.utils.tests.init()
210 ↛ 211line 210 didn't jump to line 211, because the condition on line 210 was never trueif __name__ == "__main__":
lsst.utils.tests.init()
unittest.main()
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