def main(rootDir, visit, ccd, n=10):
# butler を開き読み込みたいデータの dataId を指定する
butler = dafPersist.Butler(rootDir)
dataId = {'visit': visit, 'ccd':ccd}
# butler から一次処理済データカタログと WCS データを読み込む
sources = butler.get('src', dataId)
exposure = butler.get('calexp', dataId, immediate=True)
wcs = exposure.getWcs()
#trans = wcs.getLinearTransform()
pixScale = wcs.pixelScale().asArcseconds()
for s in sources[:n]:
# 全 CCD に対し変換をコメントアウトする
trans = wcs.linearizePixelToSky(s.getCentroid(), afwGeom.arcseconds).getLinear()
m0 = s.getShape()
m_new = m0.transform(trans)
# 座標系の変換前・後のサニティーチェックを出力する
ms = m0, m_new
pix = 1.0, pixScale
for i in 0, 1:
m = ms[i]
ax = ellipses.Axes(m)
# 座標変換後は Ixx, yy, xy は変わっているはず
print "%6.3f %6.3f %6.3f " % (m.getIxx(), m.getIyy(), m.getIxy()),
# 変換された座標系は pixelScale で割られているため、A, B は同じはず
# --> theta は x-軸 に対して無変換で、*反時計回り* に増加する（デカルト座標系）
# --> theta は RA-軸 に対して変換され、*時計回り* に増加する
print "%6.3f %6.3f %6.3f " % (ax.getA()/pix[i], ax.getB()/pix[i], ax.getTheta()),
print ""
def testHsmPsfMoments(self):
for width in (2.0, 3.0, 4.0):
psf = afwDetection.GaussianPsf(35, 35, width)
exposure = afwImage.ExposureF(45, 56)
exposure.getMaskedImage().set(1.0, 0, 1.0)
exposure.setPsf(psf)
# perform the shape measurement
msConfig = base.SingleFrameMeasurementConfig()
msConfig.algorithms.names = ["ext_shapeHSM_HsmPsfMoments"]
plugin, cat = makePluginAndCat(lsst.meas.extensions.shapeHSM.HsmPsfMomentsAlgorithm,
"ext_shapeHSM_HsmPsfMoments", centroid="centroid",
control=lsst.meas.extensions.shapeHSM.HsmPsfMomentsControl())
source = cat.addNew()
source.set("centroid_x", 23)
source.set("centroid_y", 34)
offset = afwGeom.Point2I(23, 34)
tmpSpans = afwGeom.SpanSet.fromShape(int(width), offset=offset)
source.setFootprint(afwDetection.Footprint(tmpSpans))
plugin.measure(source, exposure)
x = source.get("ext_shapeHSM_HsmPsfMoments_x")
y = source.get("ext_shapeHSM_HsmPsfMoments_y")
xx = source.get("ext_shapeHSM_HsmPsfMoments_xx")
yy = source.get("ext_shapeHSM_HsmPsfMoments_yy")
xy = source.get("ext_shapeHSM_HsmPsfMoments_xy")
self.assertAlmostEqual(x, 0.0, 3)
self.assertAlmostEqual(y, 0.0, 3)
expected = afwEll.Quadrupole(afwEll.Axes(width, width, 0.0))
self.assertAlmostEqual(xx, expected.getIxx(), SHAPE_DECIMALS)
self.assertAlmostEqual(xy, expected.getIxy(), SHAPE_DECIMALS)
self.assertAlmostEqual(yy, expected.getIyy(), SHAPE_DECIMALS)
def main():
x = numpy.linspace(-5, 5, 101)
y = numpy.linspace(-5, 5, 101)
ellipse1 = ellipses.Ellipse(ellipses.Axes(1.0, 1.0, 0.3))
ellipse2 = ellipses.Ellipse(ellipses.Axes(1.0, 1.0, numpy.pi/2 + 0.3))
f1 = lsst.shapelet.ShapeletFunction(1, lsst.shapelet.HERMITE)
f1.getCoefficients()[1] = 1.0
f1.setEllipse(ellipse1)
f2 = lsst.shapelet.ShapeletFunction(2, lsst.shapelet.HERMITE)
f2.getCoefficients()[4] = 1.0
f2.setEllipse(ellipse2)
fC = f1.convolve(f2)
plotShapeletFunction(pyplot.subplot(1, 3, 1), f1, x, y)
plotShapeletFunction(pyplot.subplot(1, 3, 2), f2, x, y)
plotShapeletFunction(pyplot.subplot(1, 3, 3), fC, x, y)
pyplot.show()
def testFootprintFromEllipse(self):
"""Create an elliptical Footprint"""
cen = afwGeom.Point2D(23, 25)
a, b, theta = 25, 15, 30
ellipse = afwGeomEllipses.Ellipse(afwGeomEllipses.Axes(a, b, math.radians(theta)), cen)
foot = afwDetect.Footprint(ellipse, afwGeom.Box2I(afwGeom.Point2I(0, 0), afwGeom.Extent2I(50, 60)))
idImage = afwImage.ImageU(afwGeom.Extent2I(foot.getRegion().getWidth(), foot.getRegion().getHeight()))
idImage.set(0)
foot.insertIntoImage(idImage, foot.getId())
if display:
ds9.mtv(idImage, frame=2)
displayUtils.drawFootprint(foot, frame=2)
shape = foot.getShape()
shape.scale(2) # <r^2> = 1/2 for a disk
ds9.dot(shape, *cen, frame=2, ctype=ds9.RED)
shape = foot.getShape()
shape.scale(2) # <r^2> = 1/2 for a disk
ds9.dot(shape, *cen, frame=2, ctype=ds9.MAGENTA)
axes = afwGeom.ellipses.Axes(foot.getShape())
axes.scale(2) # <r^2> = 1/2 for a disk
self.assertEqual(foot.getCentroid(), cen)
self.assertTrue(abs(a - axes.getA()) < 0.15, "a: %g v. %g" % (a, axes.getA()))
self.assertTrue(abs(b - axes.getB()) < 0.02, "b: %g v. %g" % (b, axes.getB()))
self.assertTrue(abs(theta - math.degrees(axes.getTheta())) < 0.2,
"theta: %g v. %g" % (theta, math.degrees(axes.getTheta())))
def _fig8Test(self, x1, y1, x2, y2):
# Construct a "figure of 8" consisting of two circles touching at the
# centre of an image, then demonstrate that it shrinks correctly.
# (Helper method for tests below.)
radius = 3
imwidth, imheight = 100, 100
nshrink = 1
# These are the correct values for footprint sizes given the paramters
# above.
circle_npix = 29
initial_npix = circle_npix * 2 - 1 # touch at one pixel
shrunk_npix = 26
box = lsst.geom.Box2I(lsst.geom.Point2I(0, 0),
lsst.geom.Extent2I(imwidth, imheight))
e1 = afwGeom.Ellipse(afwGeomEllipses.Axes(radius, radius, 0),
lsst.geom.Point2D(x1, y1))
spanSet1 = afwGeom.SpanSet.fromShape(e1)
f1 = afwDetect.Footprint(spanSet1, box)
self.assertEqual(f1.getArea(), circle_npix)
e2 = afwGeom.Ellipse(afwGeomEllipses.Axes(radius, radius, 0),
lsst.geom.Point2D(x2, y2))
spanSet2 = afwGeom.SpanSet.fromShape(e2)
f2 = afwDetect.Footprint(spanSet2, box)
self.assertEqual(f2.getArea(), circle_npix)
initial = afwDetect.mergeFootprints(f1, f2)
initial.setRegion(
f2.getRegion()) # merge does not propagate the region
self.assertEqual(initial_npix, initial.getArea())
shrunk = afwDetect.Footprint().assign(initial)
shrunk.erode(nshrink)
self.assertEqual(shrunk_npix, shrunk.getArea())
if display:
idImage = afwImage.ImageU(imwidth, imheight)
for i, foot in enumerate([initial, shrunk]):
print(foot.getArea())
foot.spans.setImage(idImage, i + 1)
afwDisplay.Display(frame=1).mtv(idImage,
title=self._testMethodName +
" image")
def testConvolution(self):
if scipy is None:
print("Skipping convolution test; scipy could not be imported.")
return
e1 = ellipses.Ellipse(ellipses.Axes(10, 8, 0.3), geom.Point2D(1.5, 2.0))
e2 = ellipses.Ellipse(ellipses.Axes(12, 9, -0.5), geom.Point2D(-1.0, -0.25))
f1 = lsst.shapelet.ShapeletFunction(3, lsst.shapelet.HERMITE, e1)
f2 = lsst.shapelet.ShapeletFunction(2, lsst.shapelet.LAGUERRE, e2)
f1.getCoefficients()[:] = np.random.randn(*f1.getCoefficients().shape)
f2.getCoefficients()[:] = np.random.randn(*f2.getCoefficients().shape)
fc1, fc2 = self.checkConvolution(f1, f2)
self.assertEqual(fc1.getBasisType(), lsst.shapelet.HERMITE)
self.assertEqual(fc2.getBasisType(), lsst.shapelet.LAGUERRE)
self.assertFloatsAlmostEqual(fc1.getEllipse().getParameterVector(),
fc2.getEllipse().getParameterVector())
self.assertEqual(fc1.getOrder(), fc2.getOrder())
fc2.changeBasisType(lsst.shapelet.HERMITE)
self.assertFloatsAlmostEqual(fc1.getCoefficients(), fc2.getCoefficients(), 1E-8)
def main():
x = numpy.linspace(-5, 5, 101)
y = numpy.linspace(-5, 5, 101)
ellipses.Quadrupole(ellipses.Axes(1.2, 0.8, 0.3))
hermiteBasis = lsst.shapelet.BasisEvaluator(4, lsst.shapelet.HERMITE)
laguerreBasis = lsst.shapelet.BasisEvaluator(4, lsst.shapelet.LAGUERRE)
processBasis(hermiteBasis, x, y)
processBasis(laguerreBasis, x, y)
pyplot.show()
def setUp(self):
self.ellipse = ellipses.Axes(10, 7, 0.3)
self.center = geom.Point2D(10.1, 11.2)
self.bbox = geom.Box2I(geom.Point2I(5, 6), geom.Point2I(13, 12))
self.image = lsst.afw.image.ImageF(self.bbox)
x, y = numpy.meshgrid(
numpy.arange(self.bbox.getBeginX(), self.bbox.getEndX()),
numpy.arange(self.bbox.getBeginY(), self.bbox.getEndY()))
# use exponential profile to ensure we don't get exact fit
self.image.getArray()[:, :] = numpy.exp(-(x**2 + y**2)**0.5)
self.inputs = ms.ModelInputHandler(self.image, self.center, self.bbox)
def _fig8Test(self, x1, y1, x2, y2):
# Construct a "figure of 8" consisting of two circles touching at the
# centre of an image, then demonstrate that it shrinks correctly.
# (Helper method for tests below.)
radius = 3
imwidth, imheight = 100, 100
nshrink = 1
# These are the correct values for footprint sizes given the paramters
# above.
circle_npix = 29
initial_npix = circle_npix * 2 - 1 # touch at one pixel
shrunk_npix = 26
box = afwGeom.Box2I(afwGeom.Point2I(0, 0),
afwGeom.Extent2I(imwidth, imheight))
e1 = afwGeomEllipses.Ellipse(afwGeomEllipses.Axes(radius, radius, 0),
afwGeom.Point2D(x1, y1))
f1 = afwDetect.Footprint(e1, box)
self.assertEqual(f1.getNpix(), circle_npix)
e2 = afwGeomEllipses.Ellipse(afwGeomEllipses.Axes(radius, radius, 0),
afwGeom.Point2D(x2, y2))
f2 = afwDetect.Footprint(e2, box)
self.assertEqual(f2.getNpix(), circle_npix)
initial = afwDetect.mergeFootprints(f1, f2)
initial.setRegion(
f2.getRegion()) # merge does not propagate the region
self.assertEqual(initial_npix, initial.getNpix())
shrunk = afwDetect.shrinkFootprint(initial, nshrink, True)
self.assertEqual(shrunk_npix, shrunk.getNpix())
if display:
idImage = afwImage.ImageU(imwidth, imheight)
for i, foot in enumerate([initial, shrunk]):
print(foot.getNpix())
foot.insertIntoImage(idImage, i + 1)
ds9.mtv(idImage)
def testFootprintFromCircle(self):
"""Create an elliptical Footprint"""
ellipse = afwGeomEllipses.Ellipse(afwGeomEllipses.Axes(6, 6, 0), afwGeom.Point2D(9,15))
foot = afwDetect.Footprint(ellipse, afwGeom.Box2I(afwGeom.Point2I(0, 0), afwGeom.Extent2I(20, 30)))
idImage = afwImage.ImageU(afwGeom.Extent2I(foot.getRegion().getWidth(), foot.getRegion().getHeight()))
idImage.set(0)
foot.insertIntoImage(idImage, foot.getId())
if False:
ds9.mtv(idImage, frame=2)
def testShrinkIsoVsManhattan(self):
# Demonstrate that isotropic and Manhattan shrinks are different.
radius = 8
imwidth, imheight = 100, 100
x0, y0 = imwidth//2, imheight//2
nshrink = 4
ellipse = afwGeomEllipses.Ellipse(afwGeomEllipses.Axes(1.5*radius, 2*radius, 0),
afwGeom.Point2D(x0,y0))
foot = afwDetect.Footprint(ellipse, afwGeom.Box2I(afwGeom.Point2I(0, 0),
afwGeom.Extent2I(imwidth, imheight)))
self.assertNotEqual(afwDetect.shrinkFootprint(foot, nshrink, False),
afwDetect.shrinkFootprint(foot, nshrink, True))
def testHsmPsfMoments(self, width, useSourceCentroidOffset, varyBBox,
wrongBBox, center):
psf = PyGaussianPsf(35,
35,
width,
varyBBox=varyBBox,
wrongBBox=wrongBBox)
exposure = afwImage.ExposureF(45, 56)
exposure.getMaskedImage().set(1.0, 0, 1.0)
exposure.setPsf(psf)
# perform the shape measurement
msConfig = base.SingleFrameMeasurementConfig()
msConfig.algorithms.names = ["ext_shapeHSM_HsmPsfMoments"]
control = lsst.meas.extensions.shapeHSM.HsmPsfMomentsControl()
self.assertFalse(control.useSourceCentroidOffset)
control.useSourceCentroidOffset = useSourceCentroidOffset
plugin, cat = makePluginAndCat(
lsst.meas.extensions.shapeHSM.HsmPsfMomentsAlgorithm,
"ext_shapeHSM_HsmPsfMoments",
centroid="centroid",
control=control)
source = cat.addNew()
source.set("centroid_x", center[0])
source.set("centroid_y", center[1])
offset = geom.Point2I(*center)
tmpSpans = afwGeom.SpanSet.fromShape(int(width), offset=offset)
source.setFootprint(afwDetection.Footprint(tmpSpans))
plugin.measure(source, exposure)
x = source.get("ext_shapeHSM_HsmPsfMoments_x")
y = source.get("ext_shapeHSM_HsmPsfMoments_y")
xx = source.get("ext_shapeHSM_HsmPsfMoments_xx")
yy = source.get("ext_shapeHSM_HsmPsfMoments_yy")
xy = source.get("ext_shapeHSM_HsmPsfMoments_xy")
self.assertFalse(source.get("ext_shapeHSM_HsmPsfMoments_flag"))
self.assertFalse(
source.get("ext_shapeHSM_HsmPsfMoments_flag_no_pixels"))
self.assertFalse(
source.get("ext_shapeHSM_HsmPsfMoments_flag_not_contained"))
self.assertFalse(
source.get("ext_shapeHSM_HsmPsfMoments_flag_parent_source"))
self.assertAlmostEqual(x, 0.0, 3)
self.assertAlmostEqual(y, 0.0, 3)
expected = afwEll.Quadrupole(afwEll.Axes(width, width, 0.0))
self.assertAlmostEqual(xx, expected.getIxx(), SHAPE_DECIMALS)
self.assertAlmostEqual(xy, expected.getIxy(), SHAPE_DECIMALS)
self.assertAlmostEqual(yy, expected.getIyy(), SHAPE_DECIMALS)
def getExposurePsfSigma(exposure, minor=False):
"""Helper function to extract the PSF size from an afwImage.Exposure object
@param exposure The exposure you want a PSF size for
@param minor Return the minor axis size of the PSF (default will be sqrt(a*b)).
"""
nx, ny = exposure.getWidth(), exposure.getHeight()
midpixel = afwGeom.Point2D(nx // 2, ny // 2)
psfshape = exposure.getPsf().computeShape(midpixel)
axes = ellipses.Axes(psfshape)
if minor:
return axes.getB()
else:
return np.sqrt(axes.getA() * axes.getB())
def setUp(self):
np.random.seed(500)
order = 4
self.ellipse = ellipses.Ellipse(ellipses.Axes(2.2, 0.8, 0.3), geom.Point2D(0.12, -0.08))
self.coefficients = np.random.randn(lsst.shapelet.computeSize(order))
self.x = np.random.randn(25)
self.y = np.random.randn(25)
self.bases = [
lsst.shapelet.BasisEvaluator(order, lsst.shapelet.HERMITE),
lsst.shapelet.BasisEvaluator(order, lsst.shapelet.LAGUERRE),
]
self.functions = [
lsst.shapelet.ShapeletFunction(order, lsst.shapelet.HERMITE, self.coefficients),
lsst.shapelet.ShapeletFunction(order, lsst.shapelet.LAGUERRE, self.coefficients),
]
for function in self.functions:
function.setEllipse(self.ellipse)
def testTablePersistence(self):
ellipse = afwGeomEllipses.Ellipse(afwGeomEllipses.Axes(8, 6, 0.25), afwGeom.Point2D(9,15))
fp1 = afwDetect.Footprint(ellipse)
fp1.addPeak(6, 7, 2)
fp1.addPeak(8, 9, 3)
with utilsTests.getTempFilePath(".fits") as tmpFile:
fp1.writeFits(tmpFile)
fp2 = afwDetect.Footprint.readFits(tmpFile)
self.assertEqual(fp1.getArea(), fp2.getArea())
self.assertEqual(list(fp1.getSpans()), list(fp2.getSpans()))
# can't use Peak operator== for comparison because it compares IDs, not positions/values
self.assertEqual(len(fp1.getPeaks()), len(fp2.getPeaks()))
for peak1, peak2 in zip(fp1.getPeaks(), fp2.getPeaks()):
self.assertEqual(peak1.getIx(), peak2.getIx())
self.assertEqual(peak1.getIy(), peak2.getIy())
self.assertEqual(peak1.getFx(), peak2.getFx())
self.assertEqual(peak1.getFy(), peak2.getFy())
self.assertEqual(peak1.getPeakValue(), peak2.getPeakValue())
def testFootprintFromCircle(self):
"""Create an elliptical Footprint"""
ellipse = afwGeom.Ellipse(afwGeomEllipses.Axes(6, 6, 0),
lsst.geom.Point2D(9, 15))
spanSet = afwGeom.SpanSet.fromShape(ellipse)
foot = afwDetect.Footprint(spanSet,
lsst.geom.Box2I(lsst.geom.Point2I(0, 0),
lsst.geom.Extent2I(20, 30)))
idImage = afwImage.ImageU(
lsst.geom.Extent2I(foot.getRegion().getWidth(),
foot.getRegion().getHeight()))
idImage.set(0)
foot.spans.setImage(idImage, foot.getId())
if False:
ds9.mtv(idImage, frame=2)
def main(rootDir, visit, ccd, n=5):
# butler を開き読み込みたいデータの dataId を指定する
butler = dafPersist.Butler(rootDir)
dataId = {'visit': visit, 'ccd': ccd}
# butler から一次処理済データのカタログファイルを抜き出す
sources = butler.get('src', dataId)
for src in sources[0:n]:
# adaptive moment を取得する
m = src.get('shape.sdss')
ixx, ixy, iyy = m.getIxx(), m.getIxy(), m.getIyy()
# 楕円体に変換（theta はラジアン表記にする）
e = geomEllip.Axes(m)
a, b, theta = e.getA(), e.getB(), e.getTheta()
print ixx, ixy, iyy, " ", a, b, theta
def main(rootDir, visit, ccd, n=5):
# make a butler and specify your dataId
butler = dafPersist.Butler(rootDir)
dataId = {'visit': visit, 'ccd':ccd}
# get the exposure from the butler
sources = butler.get('src', dataId)
for src in sources[0:n]:
# get the adaptive moments
m = src.get('shape.sdss')
ixx, ixy, iyy = m.getIxx(), m.getIxy(), m.getIyy()
# convert to an ellipse (note that theta is in radians and is not an Angle object)
e = geomEllip.Axes(m)
a, b, theta = e.getA(), e.getB(), e.getTheta()
print ixx, ixy, iyy, " ", a, b, theta
def testTablePersistence(self):
ellipse = afwGeomEllipses.Ellipse(afwGeomEllipses.Axes(8, 6, 0.25),
afwGeom.Point2D(9, 15))
fp1 = afwDetect.Footprint(ellipse)
fp1.addPeak(6, 7, 2)
fp1.addPeak(8, 9, 3)
filename = "testFootprintTablePersistence.fits"
fp1.writeFits(filename)
fp2 = afwDetect.Footprint.readFits(filename)
self.assertEqual(fp1.getArea(), fp2.getArea())
self.assertEqual(list(fp1.getSpans()), list(fp2.getSpans()))
self.assertEqual(len(fp1.getPeaks()), len(fp2.getPeaks()))
for peak1, peak2 in zip(fp1.getPeaks(), fp2.getPeaks()):
self.assertEqual(peak1.getIx(), peak2.getIx())
self.assertEqual(peak1.getIy(), peak2.getIy())
self.assertEqual(peak1.getFx(), peak2.getFx())
self.assertEqual(peak1.getFy(), peak2.getFy())
self.assertEqual(peak1.getPeakValue(), peak2.getPeakValue())
os.remove(filename)
def testFootprintFromEllipse(self):
"""Create an elliptical Footprint"""
cen = lsst.geom.Point2D(23, 25)
a, b, theta = 25, 15, 30
ellipse = afwGeom.Ellipse(
afwGeomEllipses.Axes(a, b, math.radians(theta)), cen)
spanSet = afwGeom.SpanSet.fromShape(ellipse)
foot = afwDetect.Footprint(
spanSet,
lsst.geom.Box2I(lsst.geom.Point2I(0, 0),
lsst.geom.Extent2I(50, 60)))
idImage = afwImage.ImageU(
lsst.geom.Extent2I(foot.getRegion().getWidth(),
foot.getRegion().getHeight()))
idImage.set(0)
foot.spans.setImage(idImage, 42)
if display:
disp = afwDisplay.Display(frame=2)
disp.mtv(idImage, title=self._testMethodName + " image")
afwDisplay.utils.drawFootprint(foot, frame=2)
shape = foot.getShape()
shape.scale(2) # <r^2> = 1/2 for a disk
disp.dot(shape, *cen, ctype=afwDisplay.RED)
shape = foot.getShape()
shape.scale(2) # <r^2> = 1/2 for a disk
disp.dot(shape, *cen, ctype=afwDisplay.MAGENTA)
axes = afwGeom.ellipses.Axes(foot.getShape())
axes.scale(2) # <r^2> = 1/2 for a disk
self.assertEqual(foot.getCentroid(), cen)
self.assertLess(abs(a - axes.getA()), 0.15,
f"a: {a:g} vs. {axes.getA():g}")
self.assertLess(abs(b - axes.getB()), 0.02,
f"b: {b:g} va. {axes.getB():g}")
self.assertLess(
abs(theta - math.degrees(axes.getTheta())), 0.2,
f"theta: {theta:g} vs. {math.degrees(axes.getTheta()):g}")
def testShrinkIsoVsManhattan(self):
# Demonstrate that isotropic and Manhattan shrinks are different.
radius = 8
imwidth, imheight = 100, 100
x0, y0 = imwidth // 2, imheight // 2
nshrink = 4
ellipse = afwGeom.Ellipse(
afwGeomEllipses.Axes(1.5 * radius, 2 * radius, 0),
lsst.geom.Point2D(x0, y0))
spanSet = afwGeom.SpanSet.fromShape(ellipse)
foot = afwDetect.Footprint(
spanSet,
lsst.geom.Box2I(lsst.geom.Point2I(0, 0),
lsst.geom.Extent2I(imwidth, imheight)))
footIsotropic = afwDetect.Footprint()
footIsotropic.assign(foot)
foot.erode(nshrink, afwGeom.Stencil.MANHATTAN)
footIsotropic.erode(nshrink)
self.assertNotEqual(foot, footIsotropic)
def determineKernelSize(self, psfCandidateList):
"""Sets self.kernelSize (logic in this routine is cut-and-paste from pcaPsfDeterminer)"""
sizes = np.zeros(len(psfCandidateList))
for i, psfCandidate in enumerate(psfCandidateList):
source = psfCandidate.getSource()
quad = afwEll.Quadrupole(source.getIxx(), source.getIyy(),
source.getIxy())
axes = afwEll.Axes(quad)
sizes[i] = axes.getA()
if self.config.kernelSize >= 15:
print >> sys.stderr, "WARNING: NOT scaling kernelSize by stellar quadrupole moment, but using absolute value"
self.kernelSize = int(self.config.kernelSize)
else:
self.kernelSize = 2 * int(self.config.kernelSize *
np.sqrt(np.median(sizes)) + 0.5) + 1
self.kernelSize = max(self.kernelSize, self.config.kernelSizeMin)
self.kernelSize = min(self.kernelSize, self.config.kernelSizeMax)
print >> sys.stderr, 'setting kernelSize =', self.kernelSize
def isLargeFootprint(self, footprint):
"""Returns whether a Footprint is large
'Large' is defined by thresholds on the area, size and axis ratio.
These may be disabled independently by configuring them to be non-positive.
This is principally intended to get rid of satellite streaks, which the
deblender or other downstream processing can have trouble dealing with
(e.g., multiple large HeavyFootprints can chew up memory).
"""
if self.config.maxFootprintArea > 0 and footprint.getArea(
) > self.config.maxFootprintArea:
return True
if self.config.maxFootprintSize > 0:
bbox = footprint.getBBox()
if max(bbox.getWidth(),
bbox.getHeight()) > self.config.maxFootprintSize:
return True
if self.config.minFootprintAxisRatio > 0:
axes = afwEll.Axes(footprint.getShape())
if axes.getB() < self.config.minFootprintAxisRatio * axes.getA():
return True
return False
def computeBoxRadius(self, source):
"""
Calculate the postage stamp "radius" for a source.
TODO: make RADIUS_FACTOR and MIN_RADIUS configurable.
"""
conf = self.config
min_radius = conf['min_box_size'] / 2
max_radius = conf['max_box_size'] / 2
sigma = afwEllipses.Axes(source.getShape()).getA()
if numpy.isnan(sigma):
sigma = 1.0
rad = conf['radius_factor'] * sigma
if rad < min_radius:
rad = min_radius
elif rad > max_radius:
rad = max_radius
return int(numpy.ceil(rad))
def main(rootDir, visit, ccd, n=10):
# make a butler and specify your dataId
butler = dafPersist.Butler(rootDir)
dataId = {'visit': visit, 'ccd': ccd}
# get sources and wcs from the butler
sources = butler.get('src', dataId)
exposure = butler.get('calexp', dataId, immediate=True)
wcs = exposure.getWcs()
#trans = wcs.getLinearTransform()
pixScale = wcs.pixelScale().asArcseconds()
for s in sources[:n]:
# the transform commented-out above is for the whole CCD. Let's use the local one
trans = wcs.linearizePixelToSky(s.getCentroid(),
afwGeom.arcseconds).getLinear()
m0 = s.getShape()
m_new = m0.transform(trans)
# print before and after the transform as a sanity check
ms = m0, m_new
pix = 1.0, pixScale
for i in 0, 1:
m = ms[i]
ax = ellipses.Axes(m)
# Ixx,yy,xy should be different after the transform
print "%6.3f %6.3f %6.3f " % (m.getIxx(), m.getIyy(),
m.getIxy()),
# but A,B should be the same since the transformed ones are divided by the pixelScale
# --> untransformed theta is wrt x-axis and increases *counter-clockwise* (standard cartesian)
# --> transformed theta is wrt RA-axis and increases *clockwise*
print "%6.3f %6.3f %6.3f " % (ax.getA() / pix[i],
ax.getB() / pix[i], ax.getTheta()),
print ""
def determinePsf(self,
exposure,
psfCandidateList,
metadata=None,
flagKey=None):
"""!Determine a PCA PSF model for an exposure given a list of PSF candidates
\param[in] exposure exposure containing the psf candidates (lsst.afw.image.Exposure)
\param[in] psfCandidateList a sequence of PSF candidates (each an lsst.meas.algorithms.PsfCandidate);
typically obtained by detecting sources and then running them through a star selector
\param[in,out] metadata a home for interesting tidbits of information
\param[in] flagKey schema key used to mark sources actually used in PSF determination
\return a list of
- psf: the measured PSF, an lsst.meas.algorithms.PcaPsf
- cellSet: an lsst.afw.math.SpatialCellSet containing the PSF candidates
"""
import lsstDebug
display = lsstDebug.Info(__name__).display
displayExposure = lsstDebug.Info(
__name__).displayExposure # display the Exposure + spatialCells
displayPsfCandidates = lsstDebug.Info(
__name__).displayPsfCandidates # show the viable candidates
displayIterations = lsstDebug.Info(
__name__).displayIterations # display on each PSF iteration
displayPsfComponents = lsstDebug.Info(
__name__).displayPsfComponents # show the PCA components
displayResiduals = lsstDebug.Info(
__name__).displayResiduals # show residuals
displayPsfMosaic = lsstDebug.Info(
__name__).displayPsfMosaic # show mosaic of reconstructed PSF(x,y)
# match Kernel amplitudes for spatial plots
matchKernelAmplitudes = lsstDebug.Info(__name__).matchKernelAmplitudes
# Keep matplotlib alive post mortem
keepMatplotlibPlots = lsstDebug.Info(__name__).keepMatplotlibPlots
displayPsfSpatialModel = lsstDebug.Info(
__name__).displayPsfSpatialModel # Plot spatial model?
showBadCandidates = lsstDebug.Info(
__name__).showBadCandidates # Include bad candidates
# Normalize residuals by object amplitude
normalizeResiduals = lsstDebug.Info(__name__).normalizeResiduals
pause = lsstDebug.Info(
__name__).pause # Prompt user after each iteration?
if display > 1:
pause = True
mi = exposure.getMaskedImage()
if len(psfCandidateList) == 0:
raise RuntimeError("No PSF candidates supplied.")
# construct and populate a spatial cell set
bbox = mi.getBBox()
psfCellSet = afwMath.SpatialCellSet(bbox, self.config.sizeCellX,
self.config.sizeCellY)
sizes = []
for i, psfCandidate in enumerate(psfCandidateList):
if psfCandidate.getSource().getPsfFluxFlag(): # bad measurement
continue
try:
psfCellSet.insertCandidate(psfCandidate)
except Exception as e:
self.log.debug("Skipping PSF candidate %d of %d: %s", i,
len(psfCandidateList), e)
continue
source = psfCandidate.getSource()
quad = afwEll.Quadrupole(source.getIxx(), source.getIyy(),
source.getIxy())
axes = afwEll.Axes(quad)
sizes.append(axes.getA())
if len(sizes) == 0:
raise RuntimeError("No usable PSF candidates supplied")
nEigenComponents = self.config.nEigenComponents # initial version
if self.config.kernelSize >= 15:
self.log.warn(
"WARNING: NOT scaling kernelSize by stellar quadrupole moment "
+
"because config.kernelSize=%s >= 15; using config.kernelSize as as the width, instead",
self.config.kernelSize)
actualKernelSize = int(self.config.kernelSize)
else:
medSize = numpy.median(sizes)
actualKernelSize = 2 * int(self.config.kernelSize *
math.sqrt(medSize) + 0.5) + 1
if actualKernelSize < self.config.kernelSizeMin:
actualKernelSize = self.config.kernelSizeMin
if actualKernelSize > self.config.kernelSizeMax:
actualKernelSize = self.config.kernelSizeMax
if display:
print("Median size=%s" % (medSize, ))
self.log.trace("Kernel size=%s", actualKernelSize)
# Set size of image returned around candidate
psfCandidateList[0].setHeight(actualKernelSize)
psfCandidateList[0].setWidth(actualKernelSize)
if self.config.doRejectBlends:
# Remove blended candidates completely
blendedCandidates = [
] # Candidates to remove; can't do it while iterating
for cell, cand in candidatesIter(psfCellSet, False):
if len(cand.getSource().getFootprint().getPeaks()) > 1:
blendedCandidates.append((cell, cand))
continue
if display:
print("Removing %d blended Psf candidates" %
len(blendedCandidates))
for cell, cand in blendedCandidates:
cell.removeCandidate(cand)
if sum(1 for cand in candidatesIter(psfCellSet, False)) == 0:
raise RuntimeError("All PSF candidates removed as blends")
if display:
frame = 0
if displayExposure:
ds9.mtv(exposure, frame=frame, title="psf determination")
maUtils.showPsfSpatialCells(exposure,
psfCellSet,
self.config.nStarPerCell,
symb="o",
ctype=ds9.CYAN,
ctypeUnused=ds9.YELLOW,
size=4,
frame=frame)
#
# Do a PCA decomposition of those PSF candidates
#
reply = "y" # used in interactive mode
for iterNum in range(self.config.nIterForPsf):
if display and displayPsfCandidates: # Show a mosaic of usable PSF candidates
#
import lsst.afw.display.utils as displayUtils
stamps = []
for cell in psfCellSet.getCellList():
for cand in cell.begin(not showBadCandidates
): # maybe include bad candidates
try:
im = cand.getMaskedImage()
chi2 = cand.getChi2()
if chi2 > 1e100:
chi2 = numpy.nan
stamps.append(
(im, "%d%s" %
(maUtils.splitId(cand.getSource().getId(),
True)["objId"], chi2),
cand.getStatus()))
except Exception as e:
continue
if len(stamps) == 0:
print(
"WARNING: No PSF candidates to show; try setting showBadCandidates=True"
)
else:
mos = displayUtils.Mosaic()
for im, label, status in stamps:
im = type(im)(im, True)
try:
im /= afwMath.makeStatistics(
im, afwMath.MAX).getValue()
except NotImplementedError:
pass
mos.append(
im, label, ds9.GREEN
if status == afwMath.SpatialCellCandidate.GOOD else
ds9.YELLOW if status ==
afwMath.SpatialCellCandidate.UNKNOWN else ds9.RED)
mos.makeMosaic(frame=8, title="Psf Candidates")
# Re-fit until we don't have any candidates with naughty chi^2 values influencing the fit
cleanChi2 = False # Any naughty (negative/NAN) chi^2 values?
while not cleanChi2:
cleanChi2 = True
#
# First, estimate the PSF
#
psf, eigenValues, nEigenComponents, fitChi2 = \
self._fitPsf(exposure, psfCellSet, actualKernelSize, nEigenComponents)
#
# In clipping, allow all candidates to be innocent until proven guilty on this iteration.
# Throw out any prima facie guilty candidates (naughty chi^2 values)
#
for cell in psfCellSet.getCellList():
awfulCandidates = []
for cand in cell.begin(False): # include bad candidates
cand.setStatus(afwMath.SpatialCellCandidate.UNKNOWN
) # until proven guilty
rchi2 = cand.getChi2()
if not numpy.isfinite(rchi2) or rchi2 <= 0:
# Guilty prima facie
awfulCandidates.append(cand)
cleanChi2 = False
self.log.debug("chi^2=%s; id=%s", cand.getChi2(),
cand.getSource().getId())
for cand in awfulCandidates:
if display:
print("Removing bad candidate: id=%d, chi^2=%f" % \
(cand.getSource().getId(), cand.getChi2()))
cell.removeCandidate(cand)
#
# Clip out bad fits based on reduced chi^2
#
badCandidates = list()
for cell in psfCellSet.getCellList():
for cand in cell.begin(False): # include bad candidates
rchi2 = cand.getChi2(
) # reduced chi^2 when fitting PSF to candidate
assert rchi2 > 0
if rchi2 > self.config.reducedChi2ForPsfCandidates:
badCandidates.append(cand)
badCandidates.sort(key=lambda x: x.getChi2(), reverse=True)
numBad = numCandidatesToReject(len(badCandidates), iterNum,
self.config.nIterForPsf)
for i, c in zip(range(numBad), badCandidates):
if display:
chi2 = c.getChi2()
if chi2 > 1e100:
chi2 = numpy.nan
print("Chi^2 clipping %-4d %.2g" %
(c.getSource().getId(), chi2))
c.setStatus(afwMath.SpatialCellCandidate.BAD)
#
# Clip out bad fits based on spatial fitting.
#
# This appears to be better at getting rid of sources that have a single dominant kernel component
# (other than the zeroth; e.g., a nearby contaminant) because the surrounding sources (which help
# set the spatial model) don't contain that kernel component, and so the spatial modeling
# downweights the component.
#
residuals = list()
candidates = list()
kernel = psf.getKernel()
noSpatialKernel = psf.getKernel()
for cell in psfCellSet.getCellList():
for cand in cell.begin(False):
candCenter = afwGeom.PointD(cand.getXCenter(),
cand.getYCenter())
try:
im = cand.getMaskedImage(kernel.getWidth(),
kernel.getHeight())
except Exception as e:
continue
fit = fitKernelParamsToImage(noSpatialKernel, im,
candCenter)
params = fit[0]
kernels = fit[1]
amp = 0.0
for p, k in zip(params, kernels):
amp += p * k.getSum()
predict = [
kernel.getSpatialFunction(k)(candCenter.getX(),
candCenter.getY())
for k in range(kernel.getNKernelParameters())
]
#print cand.getSource().getId(), [a / amp for a in params], predict
residuals.append(
[a / amp - p for a, p in zip(params, predict)])
candidates.append(cand)
residuals = numpy.array(residuals)
for k in range(kernel.getNKernelParameters()):
if False:
# Straight standard deviation
mean = residuals[:, k].mean()
rms = residuals[:, k].std()
elif False:
# Using interquartile range
sr = numpy.sort(residuals[:, k])
mean = sr[int(0.5*len(sr))] if len(sr) % 2 else \
0.5 * (sr[int(0.5*len(sr))] + sr[int(0.5*len(sr))+1])
rms = 0.74 * (sr[int(0.75 * len(sr))] -
sr[int(0.25 * len(sr))])
else:
stats = afwMath.makeStatistics(
residuals[:, k], afwMath.MEANCLIP | afwMath.STDEVCLIP)
mean = stats.getValue(afwMath.MEANCLIP)
rms = stats.getValue(afwMath.STDEVCLIP)
rms = max(
1.0e-4,
rms) # Don't trust RMS below this due to numerical issues
if display:
print("Mean for component %d is %f" % (k, mean))
print("RMS for component %d is %f" % (k, rms))
badCandidates = list()
for i, cand in enumerate(candidates):
if numpy.fabs(residuals[i, k] -
mean) > self.config.spatialReject * rms:
badCandidates.append(i)
badCandidates.sort(
key=lambda x: numpy.fabs(residuals[x, k] - mean),
reverse=True)
numBad = numCandidatesToReject(len(badCandidates), iterNum,
self.config.nIterForPsf)
for i, c in zip(range(min(len(badCandidates), numBad)),
badCandidates):
cand = candidates[c]
if display:
print("Spatial clipping %d (%f,%f) based on %d: %f vs %f" % \
(cand.getSource().getId(), cand.getXCenter(), cand.getYCenter(), k,
residuals[badCandidates[i], k], self.config.spatialReject * rms))
cand.setStatus(afwMath.SpatialCellCandidate.BAD)
#
# Display results
#
if display and displayIterations:
if displayExposure:
if iterNum > 0:
ds9.erase(frame=frame)
maUtils.showPsfSpatialCells(exposure,
psfCellSet,
self.config.nStarPerCell,
showChi2=True,
symb="o",
size=8,
frame=frame,
ctype=ds9.YELLOW,
ctypeBad=ds9.RED,
ctypeUnused=ds9.MAGENTA)
if self.config.nStarPerCellSpatialFit != self.config.nStarPerCell:
maUtils.showPsfSpatialCells(
exposure,
psfCellSet,
self.config.nStarPerCellSpatialFit,
symb="o",
size=10,
frame=frame,
ctype=ds9.YELLOW,
ctypeBad=ds9.RED)
if displayResiduals:
while True:
try:
maUtils.showPsfCandidates(
exposure,
psfCellSet,
psf=psf,
frame=4,
normalize=normalizeResiduals,
showBadCandidates=showBadCandidates)
maUtils.showPsfCandidates(
exposure,
psfCellSet,
psf=psf,
frame=5,
normalize=normalizeResiduals,
showBadCandidates=showBadCandidates,
variance=True)
except:
if not showBadCandidates:
showBadCandidates = True
continue
break
if displayPsfComponents:
maUtils.showPsf(psf, eigenValues, frame=6)
if displayPsfMosaic:
maUtils.showPsfMosaic(exposure,
psf,
frame=7,
showFwhm=True)
ds9.scale('linear', 0, 1, frame=7)
if displayPsfSpatialModel:
maUtils.plotPsfSpatialModel(
exposure,
psf,
psfCellSet,
showBadCandidates=True,
matchKernelAmplitudes=matchKernelAmplitudes,
keepPlots=keepMatplotlibPlots)
if pause:
while True:
try:
reply = input(
"Next iteration? [ynchpqQs] ").strip()
except EOFError:
reply = "n"
reply = reply.split()
if reply:
reply, args = reply[0], reply[1:]
else:
reply = ""
if reply in ("", "c", "h", "n", "p", "q", "Q", "s",
"y"):
if reply == "c":
pause = False
elif reply == "h":
print("c[ontinue without prompting] h[elp] n[o] p[db] q[uit displaying] " \
"s[ave fileName] y[es]")
continue
elif reply == "p":
import pdb
pdb.set_trace()
elif reply == "q":
display = False
elif reply == "Q":
sys.exit(1)
elif reply == "s":
fileName = args.pop(0)
if not fileName:
print("Please provide a filename")
continue
print("Saving to %s" % fileName)
maUtils.saveSpatialCellSet(psfCellSet,
fileName=fileName)
continue
break
else:
print("Unrecognised response: %s" % reply,
file=sys.stderr)
if reply == "n":
break
# One last time, to take advantage of the last iteration
psf, eigenValues, nEigenComponents, fitChi2 = \
self._fitPsf(exposure, psfCellSet, actualKernelSize, nEigenComponents)
#
# Display code for debugging
#
if display and reply != "n":
if displayExposure:
maUtils.showPsfSpatialCells(exposure,
psfCellSet,
self.config.nStarPerCell,
showChi2=True,
symb="o",
ctype=ds9.YELLOW,
ctypeBad=ds9.RED,
size=8,
frame=frame)
if self.config.nStarPerCellSpatialFit != self.config.nStarPerCell:
maUtils.showPsfSpatialCells(
exposure,
psfCellSet,
self.config.nStarPerCellSpatialFit,
symb="o",
ctype=ds9.YELLOW,
ctypeBad=ds9.RED,
size=10,
frame=frame)
if displayResiduals:
maUtils.showPsfCandidates(
exposure,
psfCellSet,
psf=psf,
frame=4,
normalize=normalizeResiduals,
showBadCandidates=showBadCandidates)
if displayPsfComponents:
maUtils.showPsf(psf, eigenValues, frame=6)
if displayPsfMosaic:
maUtils.showPsfMosaic(exposure, psf, frame=7, showFwhm=True)
ds9.scale("linear", 0, 1, frame=7)
if displayPsfSpatialModel:
maUtils.plotPsfSpatialModel(
exposure,
psf,
psfCellSet,
showBadCandidates=True,
matchKernelAmplitudes=matchKernelAmplitudes,
keepPlots=keepMatplotlibPlots)
#
# Generate some QA information
#
# Count PSF stars
#
numGoodStars = 0
numAvailStars = 0
avgX = 0.0
avgY = 0.0
for cell in psfCellSet.getCellList():
for cand in cell.begin(False): # don't ignore BAD stars
numAvailStars += 1
for cand in cell.begin(True): # do ignore BAD stars
src = cand.getSource()
if flagKey is not None:
src.set(flagKey, True)
avgX += src.getX()
avgY += src.getY()
numGoodStars += 1
avgX /= numGoodStars
avgY /= numGoodStars
if metadata is not None:
metadata.set("spatialFitChi2", fitChi2)
metadata.set("numGoodStars", numGoodStars)
metadata.set("numAvailStars", numAvailStars)
metadata.set("avgX", avgX)
metadata.set("avgY", avgY)
psf = PcaPsf(psf.getKernel(), afwGeom.Point2D(avgX, avgY))
return psf, psfCellSet
def setUp(self):
self.x0, self.y0 = 0, 0
self.nx, self.ny = 512, 512 #2048, 4096
self.sky = 100.0
self.nObj = 100
# make a distorter
# This is a lot of distortion ... from circle r=1, to ellipse with a=1.3 (ie. 30%)
# For suprimecam, we expect only about 5%
self.distCoeffs = [0.0, 1.0, 2.0e-04, 3.0e-8]
lanczosOrder = 3
coefficientsDistort = True
self.distorter = cameraGeom.RadialPolyDistortion(
self.distCoeffs, coefficientsDistort, lanczosOrder)
# make a detector
self.detector = cameraUtils.makeDefaultCcd(
afwGeom.Box2I(afwGeom.Point2I(0, 0),
afwGeom.Extent2I(self.nx, self.ny)))
self.detector.setDistortion(self.distorter)
self.detector.setCenter(cameraGeom.FpPoint(
255.5, 255.5)) # move boresight from center to 0,0
if False:
for x, y in [(0, 0), (0, 511), (511, 0), (511, 511)]:
p = afwGeom.Point2D(x, y)
iqq = self.distorter.distort(p, geomEllip.Quadrupole(),
self.detector)
print x, y, geomEllip.Axes(iqq)
print self.detector.getPositionFromPixel(p).getMm()
print "Max distortion on this detector: ", self.distorter.computeMaxShear(
self.detector)
# detection policies
self.detConfig = measAlg.SourceDetectionConfig()
# measurement policies
self.measSrcConfig = measAlg.SourceMeasurementConfig()
# psf star selector
starSelectorFactory = measAlg.starSelectorRegistry["secondMoment"]
starSelectorConfig = starSelectorFactory.ConfigClass()
starSelectorConfig.fluxLim = 5000.0
starSelectorConfig.histSize = 32
starSelectorConfig.clumpNSigma = 1.0
starSelectorConfig.badFlags = []
self.starSelector = starSelectorFactory(starSelectorConfig)
# psf determiner
psfDeterminerFactory = measAlg.psfDeterminerRegistry["pca"]
psfDeterminerConfig = psfDeterminerFactory.ConfigClass()
width, height = self.nx, self.ny
nEigenComponents = 3
psfDeterminerConfig.sizeCellX = width // 3
psfDeterminerConfig.sizeCellY = height // 3
psfDeterminerConfig.nEigenComponents = nEigenComponents
psfDeterminerConfig.spatialOrder = 1
psfDeterminerConfig.kernelSizeMin = 31
psfDeterminerConfig.nStarPerCell = 0
psfDeterminerConfig.nStarPerCellSpatialFit = 0 # unlimited
self.psfDeterminer = psfDeterminerFactory(psfDeterminerConfig)
def getCoeffCircle(self, radius2):
circle = afwEll.Axes(radius2, radius2, 0.0)
inner = self.radius1 / radius2
coeff1 = measAlgorithms.SincCoeffsF.get(circle, inner)
coeff2 = measAlgorithms.SincCoeffsF.get(circle, inner)
return coeff1, coeff2
def setUp(self):
self.ellipse = afwEll.Axes(10.0, 5.0, 0.12345)
self.radius1 = 0.1234
self.radius2 = 4.3210
self.inner = self.radius1 / self.radius2
def main(dataDir,
visit,
title="",
outputTxtFileName=None,
showFwhm=False,
minFwhm=None,
maxFwhm=None,
correctDistortion=False,
showEllipticity=False,
ellipticityDirection=False,
showNdataFwhm=False,
showNdataEll=False,
minNdata=None,
maxNdata=None,
gridPoints=30,
verbose=False):
butler = dafPersist.ButlerFactory(mapper=hscSim.HscSimMapper(
root=dataDir)).create()
camera = butler.get("camera")
if not (showFwhm or showEllipticity or showNdataFwhm or showNdataEll
or outputTxtFileName):
showFwhm = True
#
# Get a dict of cameraGeom::Ccd indexed by serial number
#
ccds = {}
for raft in camera:
for ccd in raft:
ccd.setTrimmed(True)
ccds[ccd.getId().getSerial()] = ccd
#
# Read all the tableSeeingMap files, converting their (x, y) to focal plane coordinates
#
xArr = []
yArr = []
ellArr = []
fwhmArr = []
paArr = []
aArr = []
bArr = []
e1Arr = []
e2Arr = []
elle1e2Arr = []
for tab in butler.subset("tableSeeingMap", visit=visit):
# we could use tab.datasetExists() but it prints a rude message
fileName = butler.get("tableSeeingMap_filename", **tab.dataId)[0]
if not os.path.exists(fileName):
continue
with open(fileName) as fd:
ccd = None
for line in fd.readlines():
if re.search(r"^\s*#", line):
continue
fields = [float(_) for _ in line.split()]
if ccd is None:
ccd = ccds[int(fields[0])]
x, y, fwhm, ell, pa, a, b = fields[1:8]
x, y = ccd.getPositionFromPixel(afwGeom.PointD(x, y)).getMm()
xArr.append(x)
yArr.append(y)
ellArr.append(ell)
fwhmArr.append(fwhm)
paArr.append(pa)
aArr.append(a)
bArr.append(b)
if len(fields) == 11:
e1 = fields[8]
e2 = fields[9]
elle1e2 = fields[10]
else:
e1 = -9999.
e2 = -9999.
elle1e2 = -9999.
e1Arr.append(e1)
e2Arr.append(e2)
elle1e2Arr.append(elle1e2)
xArr = np.array(xArr)
yArr = np.array(yArr)
ellArr = np.array(ellArr)
fwhmArr = np.array(fwhmArr) * 0.168 # arcseconds
paArr = np.radians(np.array(paArr))
aArr = np.array(aArr)
bArr = np.array(bArr)
e1Arr = np.array(e1Arr)
e2Arr = np.array(e2Arr)
elle1e2Arr = np.array(elle1e2Arr)
if correctDistortion:
import lsst.afw.geom.ellipses as afwEllipses
dist = camera.getDistortion()
for i in range(len(aArr)):
axes = afwEllipses.Axes(aArr[i], bArr[i], paArr[i])
if False: # testing only!
axes = afwEllipses.Axes(1.0, 1.0, np.arctan2(yArr[i], xArr[i]))
quad = afwEllipses.Quadrupole(axes)
quad = quad.transform(
dist.computeQuadrupoleTransform(
afwGeom.PointD(xArr[i], yArr[i]), False))
axes = afwEllipses.Axes(quad)
aArr[i], bArr[i], paArr[i] = axes.getA(), axes.getB(
), axes.getTheta()
ellArr = 1 - bArr / aArr
if len(xArr) == 0:
gridPoints = 0
xs, ys = [], []
else:
N = gridPoints * 1j
extent = [min(xArr), max(xArr), min(yArr), max(yArr)]
xs, ys = np.mgrid[extent[0]:extent[1]:N, extent[2]:extent[3]:N]
title = [
title,
]
title.append("\n#")
if outputTxtFileName:
f = open(outputTxtFileName, 'w')
f.write("# %s visit %s\n" % (" ".join(title), visit))
for x, y, ell, fwhm, pa, a, b, e1, e2, elle1e2 in zip(
xArr, yArr, ellArr, fwhmArr, paArr, aArr, bArr, e1Arr, e2Arr,
elle1e2Arr):
f.write('%f %f %f %f %f %f %f %f %f %f\n' %
(x, y, ell, fwhm, pa, a, b, e1, e2, elle1e2))
if showFwhm:
title.append("FWHM (arcsec)")
if len(xs) > 0:
fwhmResampled = griddata(xArr, yArr, fwhmArr, xs, ys)
plt.imshow(fwhmResampled.T,
extent=extent,
vmin=minFwhm,
vmax=maxFwhm,
origin='lower')
plt.colorbar()
if outputTxtFileName:
ndataGrids = getNumDataGrids(xArr, yArr, fwhmArr, xs, ys)
f = open(outputTxtFileName + '-fwhm-grid.txt', 'w')
f.write("# %s visit %s\n" % (" ".join(title), visit))
for xline, yline, fwhmline, ndataline in zip(
xs.tolist(), ys.tolist(), fwhmResampled.tolist(),
ndataGrids):
for xx, yy, fwhm, ndata in zip(xline, yline, fwhmline,
ndataline):
if fwhm is None:
fwhm = -9999
f.write('%f %f %f %d\n' % (xx, yy, fwhm, ndata))
elif showEllipticity:
title.append("Ellipticity")
scale = 4
if ellipticityDirection: # we don't care about the magnitude
ellArr = 0.1
u = -ellArr * np.cos(paArr)
v = -ellArr * np.sin(paArr)
if gridPoints > 0:
u = griddata(xArr, yArr, u, xs, ys)
v = griddata(xArr, yArr, v, xs, ys)
x, y = xs, ys
else:
x, y = xArr, yArr
Q = plt.quiver(
x,
y,
u,
v,
scale=scale,
pivot="middle",
headwidth=0,
headlength=0,
headaxislength=0,
)
keyLen = 0.10
if not ellipticityDirection: # we care about the magnitude
plt.quiverkey(Q, 0.20, 0.95, keyLen, "e=%g" % keyLen, labelpos='W')
if outputTxtFileName:
ndataGrids = getNumDataGrids(xArr, yArr, ellArr, xs, ys)
f = open(outputTxtFileName + '-ell-grid.txt', 'w')
f.write("# %s visit %s\n" % (" ".join(title), visit))
#f.write('# %f %f %f %f %f %f %f\n' % (x, y, ell, fwhm, pa, a, b))
for xline, yline, uline, vline, ndataline in zip(
x.tolist(), y.tolist(), u.tolist(), v.tolist(),
ndataGrids):
for xx, yy, uu, vv, ndata in zip(xline, yline, uline, vline,
ndataline):
if uu is None:
uu = -9999
if vv is None:
vv = -9999
f.write('%f %f %f %f %d\n' % (xx, yy, uu, vv, ndata))
elif showNdataFwhm:
title.append("N per fwhm grid")
if len(xs) > 0:
ndataGrids = getNumDataGrids(xArr, yArr, fwhmArr, xs, ys)
plt.imshow(ndataGrids,
interpolation='nearest',
extent=extent,
vmin=minNdata,
vmax=maxNdata,
origin='lower')
plt.colorbar()
else:
pass
elif showNdataEll:
title.append("N per ell grid")
if len(xs) > 0:
ndataGrids = getNumDataGrids(xArr, yArr, ellArr, xs, ys)
plt.imshow(ndataGrids,
interpolation='nearest',
extent=extent,
vmin=minNdata,
vmax=maxNdata,
origin='lower')
plt.colorbar()
else:
pass
#plt.plot(xArr, yArr, "r.")
#plt.plot(xs, ys, "b.")
plt.axes().set_aspect('equal')
plt.axis([-20000, 20000, -20000, 20000])
def frameInfoFrom(filepath):
import pyfits
with pyfits.open(filepath) as hdul:
h = hdul[0].header
'object=ABELL2163 filter=HSC-I exptime=360.0 alt=62.11143274 azm=202.32265181 hst=(23:40:08.363-23:40:48.546)'
return 'object=%s filter=%s exptime=%.1f azm=%.2f hst=%s' % (
h['OBJECT'], h['FILTER01'], h['EXPTIME'], h['AZIMUTH'],
h['HST'])
title.insert(
0,
frameInfoFrom(
butler.get('raw_filename', {
'visit': visit,
'ccd': 0
})[0]))
title.append(r'$\langle$FWHM$\rangle %4.2f$"' % np.median(fwhmArr))
plt.title("%s visit=%s" % (" ".join(title), visit), fontsize=9)
return plt
