def testNaive(self):
positions = [
lsst.geom.Point2D(60.0, -60.0),
lsst.geom.Point2D(60.5, -60.0),
lsst.geom.Point2D(60.0, -60.5),
lsst.geom.Point2D(60.5, -60.5)
]
radii = [12.0, 17.0]
for position in positions:
for radius in radii:
ellipse = lsst.afw.geom.Ellipse(
lsst.afw.geom.ellipses.Axes(radius, radius, 0.0), position)
area = self.computeNaiveArea(position, radius)
# test that this isn't the same as the sinc instFlux
self.assertFloatsNotEqual(
ApertureFluxAlgorithm.computeSincFlux(
self.exposure.getMaskedImage().getImage(), ellipse,
self.ctrl).instFlux, area)
def check(method, image):
"""Test that all instFlux measurement invocations work.
That is, that they return the expected value.
"""
result = method(image, ellipse, self.ctrl)
self.assertFloatsAlmostEqual(result.instFlux, area)
self.assertFalse(
result.getFlag(
ApertureFluxAlgorithm.APERTURE_TRUNCATED.number))
self.assertFalse(
result.getFlag(ApertureFluxAlgorithm.
SINC_COEFFS_TRUNCATED.number))
if hasattr(image, "getVariance"):
self.assertFloatsAlmostEqual(result.instFluxErr,
(area * 0.25)**0.5)
else:
self.assertTrue(np.isnan(result.instFluxErr))
check(ApertureFluxAlgorithm.computeNaiveFlux,
self.exposure.getMaskedImage())
check(ApertureFluxAlgorithm.computeNaiveFlux,
self.exposure.getMaskedImage().getImage())
check(ApertureFluxAlgorithm.computeFlux,
self.exposure.getMaskedImage())
check(ApertureFluxAlgorithm.computeFlux,
self.exposure.getMaskedImage().getImage())
# test failure conditions when the aperture itself is truncated
invalid = ApertureFluxAlgorithm.computeNaiveFlux(
self.exposure.getMaskedImage().getImage(),
lsst.afw.geom.Ellipse(lsst.afw.geom.ellipses.Axes(12.0, 12.0),
lsst.geom.Point2D(25.0, -60.0)), self.ctrl)
self.assertTrue(
invalid.getFlag(ApertureFluxAlgorithm.APERTURE_TRUNCATED.number))
self.assertFalse(
invalid.getFlag(
ApertureFluxAlgorithm.SINC_COEFFS_TRUNCATED.number))
self.assertTrue(np.isnan(invalid.instFlux))
def testNaive(self):
positions = [
lsst.afw.geom.Point2D(60.0, -60.0),
lsst.afw.geom.Point2D(60.5, -60.0),
lsst.afw.geom.Point2D(60.0, -60.5),
lsst.afw.geom.Point2D(60.5, -60.5)
]
radii = [12.0, 17.0]
for position in positions:
for radius in radii:
ellipse = lsst.afw.geom.ellipses.Ellipse(
lsst.afw.geom.ellipses.Axes(radius, radius, 0.0), position)
area = self.computeNaiveArea(position, radius)
# test that this isn't the same as the sinc flux
self.assertNotClose(
ApertureFluxAlgorithm.computeSincFlux(
self.exposure.getMaskedImage().getImage(), ellipse,
self.ctrl).flux, area)
# test that all the ways we could invoke naive flux measurement produce the expected result
def check(method, image):
result = method(image, ellipse, self.ctrl)
self.assertClose(result.flux, area)
self.assertFalse(
result.getFlag(
ApertureFluxAlgorithm.APERTURE_TRUNCATED))
self.assertFalse(
result.getFlag(
ApertureFluxAlgorithm.SINC_COEFFS_TRUNCATED))
if hasattr(image, "getVariance"):
self.assertClose(result.fluxSigma, (area * 0.25)**0.5)
else:
self.assertTrue(numpy.isnan(result.fluxSigma))
check(ApertureFluxAlgorithm.computeNaiveFlux,
self.exposure.getMaskedImage())
check(ApertureFluxAlgorithm.computeNaiveFlux,
self.exposure.getMaskedImage().getImage())
check(ApertureFluxAlgorithm.computeFlux,
self.exposure.getMaskedImage())
check(ApertureFluxAlgorithm.computeFlux,
self.exposure.getMaskedImage().getImage())
# test failure conditions when the aperture itself is truncated
invalid = ApertureFluxAlgorithm.computeNaiveFlux(
self.exposure.getMaskedImage().getImage(),
lsst.afw.geom.ellipses.Ellipse(
lsst.afw.geom.ellipses.Axes(12.0, 12.0),
lsst.afw.geom.Point2D(25.0, -60.0)), self.ctrl)
self.assertTrue(
invalid.getFlag(ApertureFluxAlgorithm.APERTURE_TRUNCATED))
self.assertFalse(
invalid.getFlag(ApertureFluxAlgorithm.SINC_COEFFS_TRUNCATED))
self.assertTrue(numpy.isnan(invalid.flux))
def testSinc(self):
positions = [lsst.afw.geom.Point2D(60.0, -60.0),
lsst.afw.geom.Point2D(60.5, -60.0),
lsst.afw.geom.Point2D(60.0, -60.5),
lsst.afw.geom.Point2D(60.5, -60.5)]
radii = [7.0, 9.0]
for position in positions:
for radius in radii:
ellipse = lsst.afw.geom.ellipses.Ellipse(lsst.afw.geom.ellipses.Axes(radius, radius, 0.0),
position)
area = ellipse.getCore().getArea()
# test that this isn't the same as the naive flux
self.assertNotClose(
ApertureFluxAlgorithm.computeNaiveFlux(self.exposure.getMaskedImage().getImage(),
ellipse, self.ctrl).flux,
area
)
# test that all the ways we could invoke sinc flux measurement produce the expected result
def check(method, image):
result = method(image, ellipse, self.ctrl)
self.assertClose(result.flux, area, rtol=1E-3)
self.assertFalse(result.getFlag(ApertureFluxAlgorithm.APERTURE_TRUNCATED))
self.assertFalse(result.getFlag(ApertureFluxAlgorithm.SINC_COEFFS_TRUNCATED))
if hasattr(image, "getVariance"):
self.assertFalse(numpy.isnan(result.fluxSigma))
else:
self.assertTrue(numpy.isnan(result.fluxSigma))
check(ApertureFluxAlgorithm.computeSincFlux, self.exposure.getMaskedImage())
check(ApertureFluxAlgorithm.computeSincFlux, self.exposure.getMaskedImage().getImage())
check(ApertureFluxAlgorithm.computeFlux, self.exposure.getMaskedImage())
check(ApertureFluxAlgorithm.computeFlux, self.exposure.getMaskedImage().getImage())
# test failure conditions when the aperture itself is truncated
invalid1 = ApertureFluxAlgorithm.computeSincFlux(
self.exposure.getMaskedImage().getImage(),
lsst.afw.geom.ellipses.Ellipse(lsst.afw.geom.ellipses.Axes(9.0, 9.0),
lsst.afw.geom.Point2D(25.0, -60.0)),
self.ctrl
)
self.assertTrue(invalid1.getFlag(ApertureFluxAlgorithm.APERTURE_TRUNCATED))
self.assertTrue(invalid1.getFlag(ApertureFluxAlgorithm.SINC_COEFFS_TRUNCATED))
self.assertTrue(numpy.isnan(invalid1.flux))
# test failure conditions when the aperture is not truncated, but the sinc coeffs are
invalid2 = ApertureFluxAlgorithm.computeSincFlux(
self.exposure.getMaskedImage().getImage(),
lsst.afw.geom.ellipses.Ellipse(lsst.afw.geom.ellipses.Axes(9.0, 9.0),
lsst.afw.geom.Point2D(30.0, -60.0)),
self.ctrl
)
self.assertFalse(invalid2.getFlag(ApertureFluxAlgorithm.APERTURE_TRUNCATED))
self.assertTrue(invalid2.getFlag(ApertureFluxAlgorithm.SINC_COEFFS_TRUNCATED))
self.assertFalse(numpy.isnan(invalid2.flux))
def testSinc(self):
positions = [lsst.afw.geom.Point2D(60.0, -60.0),
lsst.afw.geom.Point2D(60.5, -60.0),
lsst.afw.geom.Point2D(60.0, -60.5),
lsst.afw.geom.Point2D(60.5, -60.5)]
radii = [7.0, 9.0]
for position in positions:
for radius in radii:
ellipse = lsst.afw.geom.ellipses.Ellipse(lsst.afw.geom.ellipses.Axes(radius, radius, 0.0),
position)
area = ellipse.getCore().getArea()
# test that this isn't the same as the naive flux
self.assertFloatsNotEqual(
ApertureFluxAlgorithm.computeNaiveFlux(self.exposure.getMaskedImage().getImage(),
ellipse, self.ctrl).flux, area)
def check(method, image):
# test that all the ways we could invoke sinc flux measurement produce the expected result
result = method(image, ellipse, self.ctrl)
self.assertFloatsAlmostEqual(result.flux, area, rtol=1E-3)
self.assertFalse(result.getFlag(ApertureFluxAlgorithm.APERTURE_TRUNCATED.number))
self.assertFalse(result.getFlag(ApertureFluxAlgorithm.SINC_COEFFS_TRUNCATED.number))
if hasattr(image, "getVariance"):
self.assertFalse(np.isnan(result.fluxSigma))
else:
self.assertTrue(np.isnan(result.fluxSigma))
check(ApertureFluxAlgorithm.computeSincFlux, self.exposure.getMaskedImage())
check(ApertureFluxAlgorithm.computeSincFlux, self.exposure.getMaskedImage().getImage())
check(ApertureFluxAlgorithm.computeFlux, self.exposure.getMaskedImage())
check(ApertureFluxAlgorithm.computeFlux, self.exposure.getMaskedImage().getImage())
# test failure conditions when the aperture itself is truncated
invalid1 = ApertureFluxAlgorithm.computeSincFlux(
self.exposure.getMaskedImage().getImage(),
lsst.afw.geom.ellipses.Ellipse(lsst.afw.geom.ellipses.Axes(9.0, 9.0),
lsst.afw.geom.Point2D(25.0, -60.0)),
self.ctrl)
self.assertTrue(invalid1.getFlag(ApertureFluxAlgorithm.APERTURE_TRUNCATED.number))
self.assertTrue(invalid1.getFlag(ApertureFluxAlgorithm.SINC_COEFFS_TRUNCATED.number))
self.assertTrue(np.isnan(invalid1.flux))
# test failure conditions when the aperture is not truncated, but the sinc coeffs are
invalid2 = ApertureFluxAlgorithm.computeSincFlux(
self.exposure.getMaskedImage().getImage(),
lsst.afw.geom.ellipses.Ellipse(lsst.afw.geom.ellipses.Axes(9.0, 9.0),
lsst.afw.geom.Point2D(30.0, -60.0)),
self.ctrl)
self.assertFalse(invalid2.getFlag(ApertureFluxAlgorithm.APERTURE_TRUNCATED.number))
self.assertTrue(invalid2.getFlag(ApertureFluxAlgorithm.SINC_COEFFS_TRUNCATED.number))
self.assertFalse(np.isnan(invalid2.flux))
def testNaive(self):
positions = [lsst.geom.Point2D(60.0, -60.0),
lsst.geom.Point2D(60.5, -60.0),
lsst.geom.Point2D(60.0, -60.5),
lsst.geom.Point2D(60.5, -60.5)]
radii = [12.0, 17.0]
for position in positions:
for radius in radii:
ellipse = lsst.afw.geom.Ellipse(lsst.afw.geom.ellipses.Axes(radius, radius, 0.0), position)
area = self.computeNaiveArea(position, radius)
# test that this isn't the same as the sinc instFlux
self.assertFloatsNotEqual(
ApertureFluxAlgorithm.computeSincFlux(self.exposure.getMaskedImage().getImage(),
ellipse, self.ctrl).instFlux, area)
def check(method, image):
"""Test that all instFlux measurement invocations work.
That is, that they return the expected value.
"""
result = method(image, ellipse, self.ctrl)
self.assertFloatsAlmostEqual(result.instFlux, area)
self.assertFalse(result.getFlag(ApertureFluxAlgorithm.APERTURE_TRUNCATED.number))
self.assertFalse(result.getFlag(ApertureFluxAlgorithm.SINC_COEFFS_TRUNCATED.number))
if hasattr(image, "getVariance"):
self.assertFloatsAlmostEqual(result.instFluxErr, (area*0.25)**0.5)
else:
self.assertTrue(np.isnan(result.instFluxErr))
check(ApertureFluxAlgorithm.computeNaiveFlux, self.exposure.getMaskedImage())
check(ApertureFluxAlgorithm.computeNaiveFlux, self.exposure.getMaskedImage().getImage())
check(ApertureFluxAlgorithm.computeFlux, self.exposure.getMaskedImage())
check(ApertureFluxAlgorithm.computeFlux, self.exposure.getMaskedImage().getImage())
# test failure conditions when the aperture itself is truncated
invalid = ApertureFluxAlgorithm.computeNaiveFlux(
self.exposure.getMaskedImage().getImage(),
lsst.afw.geom.Ellipse(lsst.afw.geom.ellipses.Axes(12.0, 12.0),
lsst.geom.Point2D(25.0, -60.0)),
self.ctrl)
self.assertTrue(invalid.getFlag(ApertureFluxAlgorithm.APERTURE_TRUNCATED.number))
self.assertFalse(invalid.getFlag(ApertureFluxAlgorithm.SINC_COEFFS_TRUNCATED.number))
self.assertTrue(np.isnan(invalid.instFlux))