def do_testAstrometry(self, control, bkgd):
"""Test that we can instantiate and play with a centroiding algorithms"""
x0, y0 = 12345, 54321
for imageFactory in (
afwImage.MaskedImageF,
afwImage.MaskedImageD,
):
im = imageFactory(afwGeom.ExtentI(100, 100))
im.setXY0(afwGeom.Point2I(x0, y0))
psf = testLib.makeTestPsf(im)
exp = afwImage.makeExposure(im)
exp.setPsf(psf)
schema = afwTable.SourceTable.makeMinimalSchema()
centroider = algorithms.MeasureSourcesBuilder().addAlgorithm(
control).build(schema)
#-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
im.set(bkgd)
x, y = 30, 20
im.set(x, y, (1010, ))
table = afwTable.SourceTable.make(schema)
table.defineCentroid(control.name)
source = table.makeRecord()
foot = afwDetection.Footprint(exp.getBBox())
source.setFootprint(foot)
centroider.apply(source, exp, afwGeom.Point2D(x + x0, y + y0))
self.assertEqual(x + x0, source.getX())
self.assertEqual(y + y0, source.getY())
self.assertFalse(source.get(control.name + ".flags"))
#-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
im.set(bkgd)
im.set(10, 20, (1010, ))
im.set(10, 21, (1010, ))
im.set(11, 20, (1010, ))
im.set(11, 21, (1010, ))
x, y = 10.5 + x0, 20.5 + y0
centroider.apply(source, exp,
afwGeom.Point2D(x + 0.123, y - 0.123))
self.assertEqual(x, source.getX())
self.assertEqual(y, source.getY())
self.assertFalse(source.get(control.name + ".flags"))
def do_testAstrometry(self, alg, bkgd, control):
"""Test that we can instantiate and play with a centroiding algorithms"""
schema = afwTable.SourceTable.makeMinimalSchema()
schema.getAliasMap().set("slot_Centroid", "test")
centroider = alg(control, "test", schema)
table = afwTable.SourceCatalog(schema)
x0, y0 = 12345, 54321
for imageFactory in (afwImage.MaskedImageF, ):
im = imageFactory(afwGeom.ExtentI(100, 100))
im.setXY0(afwGeom.Point2I(x0, y0))
# This fixed DoubleGaussianPsf replaces a computer generated one.
# The values are not anything in particular, just a reasonable size.
psf = lsst.afw.detection.GaussianPsf(15, 15, 3.0)
exp = afwImage.makeExposure(im)
exp.setPsf(psf)
#-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
im.set(bkgd)
x, y = 30, 20
im.set(x, y, (1010, ))
source = table.addNew()
foot = afwDetection.Footprint(exp.getBBox(afwImage.LOCAL))
foot.addPeak(x + x0, y + y0, 1010)
source.setFootprint(foot)
centroider.measure(source, exp)
self.assertClose(x + x0, source.getX(), rtol=.00001)
self.assertClose(y + y0, source.getY(), rtol=.00001)
self.assertFalse(source.get("test_flag"))
#-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
im.set(bkgd)
im.set(10, 20, (1010, ))
im.set(10, 21, (1010, ))
im.set(11, 20, (1010, ))
im.set(11, 21, (1010, ))
x, y = 10.5 + x0, 20.5 + y0
source = table.addNew()
source.set('test_x', x)
source.set('test_y', y)
centroider.measure(source, exp)
self.assertClose(x, source.getX(), rtol=.00001)
self.assertClose(y, source.getY(), rtol=.00001)
self.assertFalse(source.get("test_flag"))
def mySetup(self, runCentroider=True):
msConfig = algorithms.SourceMeasurementConfig()
if not runCentroider:
msConfig.centroider = None
msConfig.slots.centroid = None
schema = afwTable.SourceTable.makeMinimalSchema()
ms = msConfig.makeMeasureSources(schema)
table = afwTable.SourceTable.make(schema)
msConfig.slots.setupTable(table)
source = table.makeRecord()
fp = afwDetection.Footprint(self.exp.getBBox())
source.setFootprint(fp)
ms.apply(source, self.exp, afwGeom.Point2D(self.xcen, self.ycen))
return source
def mySetup(self):
msConfig = measBase.SingleFrameMeasurementConfig()
msConfig.algorithms.names = ["base_SdssCentroid"]
msConfig.slots.centroid = "base_SdssCentroid"
msConfig.slots.shape = None
msConfig.slots.apFlux = None
msConfig.slots.modelFlux = None
msConfig.slots.psfFlux = None
msConfig.slots.instFlux = None
msConfig.slots.calibFlux = None
schema = afwTable.SourceTable.makeMinimalSchema()
task = measBase.SingleFrameMeasurementTask(schema, config=msConfig)
measCat = afwTable.SourceCatalog(schema)
source = measCat.addNew()
fp = afwDetection.Footprint(self.exp.getBBox(afwImage.LOCAL))
fp.addPeak(50, 50, 1000.0)
source.setFootprint(fp)
# Then run the default SFM task. Results not checked
task.run(measCat, self.exp)
return source
def testAlgorithms(self):
"""Test that we can instantiate and use algorithms"""
config = measAlg.SourceMeasurementConfig()
config.algorithms.names = measAlg.AlgorithmRegistry.all.keys()
config.algorithms.names.discard(config.centroider.name)
config.doReplaceWithNoise = False
config.algorithms.names.discard("flux.peakLikelihood")
if False:
log = pexLog.getDefaultLog()
log.setThreshold(log.DEBUG)
schema = afwTable.SourceTable.makeMinimalSchema()
task = measAlg.SourceMeasurementTask(schema, config=config)
catalog = afwTable.SourceCatalog(schema)
source = catalog.addNew()
source.set("id", 12345)
size = 256
xStar, yStar = 65.432, 76.543
width = 3.21
x0, y0 = 12345, 54321
x, y = numpy.indices((size, size))
im = afwImage.MaskedImageF(afwGeom.ExtentI(size, size))
im.setXY0(afwGeom.Point2I(x0, y0))
im.getVariance().set(1.0)
arr = im.getImage().getArray()
arr[y,
x] = numpy.exp(-0.5 * ((x - xStar)**2 + (y - yStar)**2) / width**2)
psf = testLib.makeTestPsf(im)
exp = afwImage.makeExposure(im)
exp.setPsf(psf)
exp.setXY0(afwGeom.Point2I(x0, y0))
scale = 1.0e-5
wcs = afwImage.makeWcs(
afwCoord.Coord(0.0 * afwGeom.degrees, 0.0 * afwGeom.degrees),
afwGeom.Point2D(0.0, 0.0), scale, 0.0, 0.0, scale)
exp.setWcs(wcs)
point = afwGeom.Point2I(int(xStar + x0), int(yStar + y0))
bbox = im.getBBox()
bbox.shift(afwGeom.Extent2I(x0, y0))
foot = afwDetection.Footprint(point, width, bbox)
foot.addPeak(point.getX(), point.getY(), 1.0)
afwDetection.setMaskFromFootprint(exp.getMaskedImage().getMask(), foot,
1)
source.setFootprint(foot)
if display:
ds9.mtv(exp, frame=1)
task.run(exp, catalog)
for alg in config.algorithms:
flagName = alg + ".flags"
if False:
print(alg,
source.get(flagName) if flagName in schema else None,
source.get(alg) if alg in schema else None)
elif flagName in schema:
self.assertFalse(source.get(alg + ".flags"))
