def __init__(self, DynSpecMS):
self.DynSpecMS=DynSpecMS
self.DIRNAME="DynSpecs_%s"%self.DynSpecMS.OutName
#image = self.DynSpecMS.Image
#self.ImageData=np.squeeze(fits.getdata(image, ext=0))
self.ImageI=self.DynSpecMS.ImageI
if self.ImageI and os.path.isfile(self.DynSpecMS.ImageI):
self.im=self.imI=image(self.DynSpecMS.ImageI)
self.ImageIData=self.imI.getdata()[0,0]
self.ImageV=self.DynSpecMS.ImageV
if self.ImageV and os.path.isfile(self.ImageV):
self.imV=image(self.DynSpecMS.ImageV)
self.ImageVData=self.imV.getdata()[0,1]
else:
self.ImageVData=self.ImageIData.copy()
self.imV=self.imI
self.ImageVData=np.random.randn(*self.ImageVData.shape)
self.ImageV=self.ImageI
self.CatFlux=np.zeros((self.DynSpecMS.NDir,),dtype=[('Name','S200'),("ra",np.float64),("dec",np.float64),('Type','S200'),("IDFacet",np.int32),
("FluxI",np.float32),("FluxV",np.float32),("sigFluxI",np.float32),("sigFluxV",np.float32)])
self.CatFlux=self.CatFlux.view(np.recarray)
os.system("rm -rf %s"%self.DIRNAME)
os.system("mkdir -p %s/TARGET"%self.DIRNAME)
os.system("mkdir -p %s/OFF"%self.DIRNAME)
def main(image_pre, image_post, res_val, max_factor=0.5):
"""
Verify subtraction by checking quantities in residual images
Parameters
----------
image_pre : str
Filename of image before selfcal
image_post : str
Filename of image after selfcal
res_val : float
Maximum allowed value of peak residual (Jy/beam)
max_factor : float
Factor by which old peak residual must exceed new peak residual
"""
imgpre = pim.image(image_pre)
maxvalpre = numpy.max(numpy.abs(imgpre.getdata()))
imgpost = pim.image(image_post)
maxvalpost = numpy.max(numpy.abs(imgpost.getdata()))
if (maxvalpost > res_val) or (maxvalpost*max_factor > maxvalpre):
return {'break': False, 'maxvalpost': maxvalpost, 'maxvalpre': maxvalpre}
else:
return {'break': True, 'maxvalpost': maxvalpost, 'maxvalpre': maxvalpre}
def main(args): image = args.image pb = pim.image(image) pbdata = pb.getdata() (nx,ny) = pbdata.shape[2:] pbrad = args.radius*nx cy = ny/2 cx = nx/2 pbcounter = 0 for j in range(nx,cx,-1): k = ny while np.sqrt((j-cx)**2+(k-cy)**2)>pbrad and k>cy: pbcounter += 1 pbdata[:,:,k-1,j-1]=0. pbdata[:,:,k-1,nx-j]=0. pbdata[:,:,ny-k,j-1]=0. pbdata[:,:,ny-k,nx-j]=0. k -= 1 if k == ny: print j,nx break print pbcounter,'x 4 =',pbcounter*4,'zeros replaced' if args.output == '': while image[-1]=='/': image=image[:-1] outim = image+'z' else: outim = args.output print 'Writing',outim pout = pim.image(outim,values=pbdata,coordsys=pb.coordinates())
def validate_image_equality(image_1_path, image_2_path, max_delta):
import pyrap.images as pim
# get the difference between the two images
print("comparing images from paths:")
print(image_1_path)
print(image_2_path)
im = pim.image('"{0}" - "{1}"'.format(image_1_path, image_2_path))
im.saveas("difference.IM2")
# get the stats of the image
stats_dict = im.statistics()
return_value = compare_image_statistics(stats_dict, max_delta)
if not return_value:
print("\n\n\n")
print("*"*30)
print("Statistics of the produced image:")
im = pim.image("{0}".format(image_1_path))
stats_dict_single_image = im.statistics()
print(stats_dict_single_image)
print("\n\n\n")
print("Statistics of the compare image:")
im = pim.image("{0}".format(image_2_path))
stats_dict_single_image = im.statistics()
print(stats_dict_single_image)
print("\n\n\n")
print("difference between produced image and the baseline image:")
print("maximum delta: {0}".format(max_delta))
print(stats_dict)
print("*"*30)
return return_value
def validate_image_equality(image_1_path, image_2_path, max_delta):
import pyrap.images as pim
# get the difference between the two images
print "comparing images from paths:"
print image_1_path
print image_2_path
im = pim.image('"{0}" - "{1}"'.format(image_1_path, image_2_path))
im.saveas("difference.IM2")
# get the stats of the image
stats_dict = im.statistics()
return_value = compare_image_statistics(stats_dict, max_delta)
if not return_value:
print "\n\n\n"
print "*"*30
print "Statistics of the produced image:"
im = pim.image("{0}".format(image_1_path))
stats_dict_single_image = im.statistics()
print stats_dict_single_image
print "\n\n\n"
print "Statistics of the compare image:"
im = pim.image("{0}".format(image_2_path))
stats_dict_single_image = im.statistics()
print stats_dict_single_image
print "\n\n\n"
print "difference between produced image and the baseline image:"
print "maximum delta: {0}".format(max_delta)
print stats_dict
print "*"*30
return return_value
def validate_image_equality(image_1_path, image_2_path, max_delta):
import pyrap.images as pim
# get the difference between the two images
im = pim.image("{0} - {1}".format(image_1_path, image_2_path))
im.saveas("difference.IM2")
# get the stats of the image
stats_dict = im.statistics()
return_value = compare_image_statistics(stats_dict, max_delta)
if not return_value:
print "\n\n\n"
print "*" * 30
print "Statistics of the produced image:"
im = pim.image("{0}".format(image_1_path))
stats_dict_single_image = im.statistics()
print stats_dict_single_image
print "\n\n\n"
print "Statistics of the compare image:"
im = pim.image("{0}".format(image_2_path))
stats_dict_single_image = im.statistics()
print stats_dict_single_image
print "\n\n\n"
print "difference between produced image and the baseline image:"
print "maximum delta: {0}".format(max_delta)
print stats_dict
print "*" * 30
return return_value
def main(image_pre, image_post, res_val, max_factor=0.5):
"""
Verify subtraction by checking quantities in residual images
Parameters
----------
image_pre : str
Filename of image before selfcal
image_post : str
Filename of image after selfcal
res_val : float
Maximum allowed value of peak residual (Jy/beam)
max_factor : float
Factor by which old peak residual must exceed new peak residual
"""
imgpre = pim.image(image_pre)
maxvalpre = numpy.max(numpy.abs(imgpre.getdata()))
imgpost = pim.image(image_post)
maxvalpost = numpy.max(numpy.abs(imgpost.getdata()))
if (maxvalpost > res_val) or (maxvalpost * max_factor > maxvalpre):
return {
'break': False,
'maxvalpost': maxvalpost,
'maxvalpre': maxvalpre
}
else:
return {
'break': True,
'maxvalpost': maxvalpost,
'maxvalpre': maxvalpre
}
def main(args):
image = args.image
pb = pim.image(image)
pbdata = pb.getdata()
(nx, ny) = pbdata.shape[2:]
pbrad = args.radius * nx
cy = ny / 2
cx = nx / 2
pbcounter = 0
for j in range(nx, cx, -1):
k = ny
while np.sqrt((j - cx)**2 + (k - cy)**2) > pbrad and k > cy:
pbcounter += 1
pbdata[:, :, k - 1, j - 1] = 0.
pbdata[:, :, k - 1, nx - j] = 0.
pbdata[:, :, ny - k, j - 1] = 0.
pbdata[:, :, ny - k, nx - j] = 0.
k -= 1
if k == ny:
print j, nx
break
print pbcounter, 'x 4 =', pbcounter * 4, 'zeros replaced'
if args.output == '':
while image[-1] == '/':
image = image[:-1]
outim = image + 'z'
else:
outim = args.output
print 'Writing', outim
pout = pim.image(outim, values=pbdata, coordsys=pb.coordinates())
def mask_vertices(mask_im, vertices_file):
"""
Modify the input image to exclude regions outside of the polygon
Parameters
----------
mask_im : pyrap.images image() object
Mask image to modify
vertices_file: str
Filename of pickle file that contains direction dictionary with
vertices
Returns
-------
new_im: pyrap.images image() object
Modified mask image
bool_mask : pyrap.images image() object
Modified mask image
"""
import pyrap.images as pim
ma = mask_im.coordinates()
new_im = pim.image('',shape=mask_im.shape(), coordsys=ma)
bool_mask = pim.image('',shape=mask_im.shape(), coordsys=ma)
img_type = mask_im.imagetype()
data = mask_im.getdata()
bool_data = np.ones(data.shape)
vertices = read_vertices(vertices_file)
RAverts = vertices[0]
Decverts = vertices[1]
xvert = []
yvert = []
for RAvert, Decvert in zip(RAverts, Decverts):
pixels = mask_im.topixel([1, 1, Decvert*np.pi/180.0,
RAvert*np.pi/180.0])
xvert.append(pixels[2]) # x -> Dec
yvert.append(pixels[3]) # y -> RA
poly = Polygon(xvert, yvert)
# Find distance to nearest poly edge and unmask those that
# are outside the facet (dist < 0)
masked_ind = np.indices(data[0, 0].shape)
dist = poly.is_inside(masked_ind[0], masked_ind[1])
outside_ind = np.where(dist < 0.0)
if len(outside_ind[0]) > 0:
data[0, 0, masked_ind[0][outside_ind], [masked_ind[1][outside_ind]]] = 0
bool_data[0, 0, masked_ind[0][outside_ind], [masked_ind[1][outside_ind]]] = 0
new_im.putdata(data)
bool_mask.putdata(bool_data)
return new_im, bool_mask
def find_imagenoise(imagename):
"""
Finds noise, dynamic range, and min/max for an image
Parameters
----------
imagename : str
Filename of image
Returns
-------
rms : float
Noise (Jy/beam) of image
dynamic_range : float
Dynamic range (max/min) of image
minmax : float
Ratio of min/max
"""
im = pim.image(imagename)
image = numpy.copy(im.getdata())
mean, rms = meanclip(image)
minmax = abs(numpy.min(image) / numpy.max(image))
return rms, numpy.abs(numpy.max(image) / rms), minmax
def find_imagenoise(imagename):
"""
Finds noise, dynamic range, and min/max for an image
Parameters
----------
imagename : str
Filename of image
Returns
-------
rms : float
Noise (Jy/beam) of image
dynamic_range : float
Dynamic range (max/min) of image
minmax : float
Ratio of min/max
"""
im = pim.image(imagename)
image = numpy.copy(im.getdata())
mean, rms = meanclip(image)
minmax = abs(numpy.min(image) / numpy.max(image))
return rms, numpy.abs(numpy.max(image)/rms), minmax
def init2():
from pyrap.images import image
im = image("/home/tasse/Desktop/FITS/image_049_073.img.restored.fits")
PMaj = (im.imageinfo()["restoringbeam"]["major"]["value"])
PMin = (im.imageinfo()["restoringbeam"]["minor"]["value"])
PPA = (im.imageinfo()["restoringbeam"]["positionangle"]["value"])
print(
ModColor.Str(" - Using psf (maj,min,pa)=(%6.2f, %6.2f, %6.2f)" %
(PMaj, PMin, PPA),
col='green',
Bold=False))
ToSig = (1. / 3600.) * (np.pi / 180.) / (2. * np.sqrt(2. * np.log(2)))
PMaj *= ToSig
PMin *= ToSig
PPA *= np.pi / 180
b = im.getdata()[0, 0, :, :]
b = b[3000:4000, 3000:4000] #[100:250,200:350]
c = im.coordinates()
incr = np.abs(c.dict()["direction0"]["cdelt"][0])
print(
ModColor.Str(" - Psf Size Sigma_(Maj,Min) = (%5.1f,%5.1f) pixels" %
(PMaj / incr, PMin / incr),
col="green",
Bold=False))
Islands = ClassIslands.ClassIslands(b, 10., Boost=1, DoPlot=1)
#Islands.Noise=30e-3
Islands.FindAllIslands()
sourceList = []
ImOut = np.zeros_like(b)
pylab.ion()
for i in range(len(Islands.ListX)):
#comment='Isl %i/%i' % (i+1,len(Islands.ListX))
#pBAR.render(int(100* float(i+1) / len(Islands.ListX)), comment)
xin, yin, zin = np.array(Islands.ListX[i]), np.array(
Islands.ListY[i]), np.array(Islands.ListS[i])
xm = int(np.sum(xin * zin) / np.sum(zin))
ym = int(np.sum(yin * zin) / np.sum(zin))
#Fit=ClassPointFit(xin,yin,zin,psf=(PMaj/incr,PMin/incr,PPA),noise=Islands.Noise)
Fit = ClassPointFit(xin,
yin,
zin,
psf=(PMaj / incr, PMin / incr, PPA),
noise=Islands.Noise[xm, ym])
sourceList += Fit.DoAllFit()
Fit.PutFittedArray(ImOut)
xlist = []
ylist = []
slist = []
for ijs in sourceList:
i, j, s = ijs
xlist.append(i)
ylist.append(j)
slist.append(s)
Islands.FittedComps = (xlist, ylist, slist)
Islands.FitIm = ImOut
Islands.plot()
def main(fitsimage, outfilename, force_stokes_i=False):
"""
Convert a fits image to a CASA image
Parameters
----------
fitsimage : str
Name of FITS image
outfilename : str
Name of output CASA image
force_stokes_i : bool, optional
If True, force Stokes axis to be 'I'
"""
casaimage = pim.image(fitsimage)
casaimage.saveas(outfilename, overwrite=True)
if type(force_stokes_i) is str:
if force_stokes_i.lower() == 'true':
force_stokes_i = True
else:
force_stokes_i = False
if force_stokes_i:
coords = casaimage.coordinates().dict()
coords['stokes1']['stokes'] = ['I']
freq = coords['spectral2']['wcs']['crval']
coords['spectral2']['restfreqs'] = np.array([freq])
outtable = pt.table(outfilename, readonly=False, ack=False)
outtable.putkeywords({'coords': coords})
outtable.done()
def convertStamps(self, BoxPix=200, SubPlots=(2, 2), rms=0.0007):
im = image(self.FitsName)
data = im.getdata()[0, 0]
D = data
Np = 1000
nx, ny = D.shape
indx = np.int64(np.random.rand(Np) * nx)
indy = np.int64(np.random.rand(Np) * ny)
#rms=np.std(D[indx,indy])
NX, NY = GiveNXNYPanels(len(self.DicoStamps.keys()), ratio=800 / 500)
pol, freq, rac, decc = im.toworld((0, 0, 0, 0))
pylab.clf()
for iStamp in self.DicoStamps.keys():
ax = pylab.subplot(NX, NY, iStamp + 1)
outname = self.FitsName + ".%2.2i" % iStamp
rac = self.DicoStamps[iStamp]["radeg"] * np.pi / 180
decc = self.DicoStamps[iStamp]["decdeg"] * np.pi / 180
_, _, xc, yc = im.topixel((pol, freq, decc, rac))
D = data[int(xc) - BoxPix:int(xc) + BoxPix,
int(yc) - BoxPix:int(yc) + BoxPix]
vmax = 30. * rms #np.max([D.max(),10.*rms])
pylab.imshow(D, vmin=-5. * rms, vmax=vmax, cmap="gray")
ax.set_xticklabels([])
ax.get_xaxis().set_visible(False)
ax.set_yticklabels([])
ax.get_yaxis().set_visible(False)
pylab.tight_layout()
pylab.draw()
pylab.show(False)
pylab.pause(0.1)
def CleanMaskedComponants(self, MaskName):
print >> log, "Cleaning model dictionary from masked components using %s" % (
MaskName)
im = image(MaskName)
MaskArray = im.getdata()[0, 0].T[::-1]
for (x, y) in self.DicoSMStacked["Comp"].keys():
if MaskArray[x, y] == 0:
del (self.DicoSMStacked["Comp"][(x, y)])
def main(image, output=None, radius=0.5):
"""
Zero corners of avgpb images
Parameters
----------
image : str
avgpb image
output : str, optional
Output image name. If None, add a 'z' to the end of the input filename
radius : float, optional
Radius beyond which to zero avgpb values (expressed as fraction of
image width)
"""
if type(radius) is str:
radius = float(radius)
pb = pim.image(image)
pbdata = pb.getdata()
(nx, ny) = pbdata.shape[2:]
pbrad = radius * nx
cy = ny / 2
cx = nx / 2
pbcounter = 0
for j in range(nx, cx, -1):
k = ny
while np.sqrt((j-cx)**2+(k-cy)**2) > pbrad and k > cy:
pbcounter += 1
pbdata[:, :, k-1, j-1] = 0.
pbdata[:, :, k-1, nx-j] = 0.
pbdata[:, :, ny-k, j-1] = 0.
pbdata[:, :, ny-k, nx-j] = 0.
k -= 1
if k == ny:
break
print pbcounter,'x 4 =',pbcounter*4,'zeros replaced'
if output is None:
while image[-1] == '/':
image = image[: -1]
outim = image + 'z'
else:
outim = output
pout = pim.image(outim, values=pbdata, coordsys=pb.coordinates())
def Print(ImageName="testImage.fits"):
im=image(ImageName)
d=im.getdata()
_,_,lx,ly=np.where(d!=0)
for x,y in zip(lx,ly):
_,_,dec,ra=im.toworld([0,0,x,y])
print rad2hmsdms.rad2hmsdms(ra,Type="ra").replace(" ",":"),", ",rad2hmsdms.rad2hmsdms(dec,Type="dec").replace(" ",".")
def find_imagenoise(imagename):
"""
Finds the noise level of an image
"""
im = pim.image(imagename)
image = numpy.copy(im.getdata())
mean, rms = meanclip(image)
#im.close()
return rms, numpy.abs(numpy.max(image) / numpy.min(image))
def find_imagenoise(imagename):
"""
Finds the noise level of an image
"""
im = pim.image(imagename)
image = numpy.copy(im.getdata())
mean, rms = meanclip(image)
#im.close()
return rms, numpy.abs(numpy.max(image)/numpy.min(image))
def __init__(self, imagename, *args, **kwargs):
"""
Constructor
Keyword arguments:
imagename -- Str to casa image of primary beam
"""
super(MSPrimaryBeamModel, self).__init__(*args, **kwargs)
self.imagename = imagename
try:
from taskinit import ia
ia.open(imagename)
self.cs = ia.coordsys()
self.nx = ia.shape()[0]
self.ny = ia.shape()[1]
self.refpix_x = self.cs.referencepixel()['numeric'][0]
self.refpix_y = self.cs.referencepixel()['numeric'][1]
self.increment_x = self.cs.increment()['numeric'][0]
self.increment_y = self.cs.increment()['numeric'][1]
try:
self.frequencyaxis = self.cs.findaxisbyname('frequency')
self.nu0 = self.cs.referencevalue()['numeric'][
self.frequencyaxis]
except Exception:
self.nu0 = None
print('Some stuff!')
self.data = ia.getregion()[:, :, 0, 0]
ia.done()
except ImportError:
from pyrap.images import image
im = image(imagename)
self.nx = im.shape()[-1]
self.nx = im.shape()[-2]
self.cs = im.coordinates()
self.cs_dir = self.cs.get_coordinate('direction')
self.refpix_x = self.cs_dir.get_referencepixel()[1]
self.refpix_y = self.cs_dir.get_referencepixel()[0]
self.increment_x = self.cs_dir.get_increment()[1]
self.increment_y = self.cs_dir.get_increment()[0]
try:
self.nu0 = self.cs.get_coordinate(
'spectral').get_referencevalue()
except Exception:
self.nu0 = None
print(
'Warning! No frequency information in primary beam model.')
self.data = im.getdata()[0, 0]
def CleanMaskedComponants(self,MaskName,InvertMask=False):
print("Cleaning model dictionary from masked components using %s [%i componants]"%(MaskName,len(self.DicoSMStacked["Comp"])), file=log)
im=image(MaskName)
MaskArray=im.getdata()[0,0].T[::-1]
if InvertMask:
print(" Inverting the mask", file=log)
MaskArray=1-MaskArray
for (x,y) in self.DicoSMStacked["Comp"].keys():
if MaskArray[x,y]==0:
del(self.DicoSMStacked["Comp"][(x,y)])
print(" There are %i componants left"%len(self.DicoSMStacked["Comp"]), file=log)
def readExternalMaskFromFits(self):
CleanMaskImage = self.GD["Mask"]["External"]
if not CleanMaskImage: return
print(" Reading mask image: %s" % CleanMaskImage, file=log)
MaskImage = image(CleanMaskImage).getdata()
nch, npol, _, _ = MaskImage.shape
MaskArray = np.zeros(MaskImage.shape, np.bool8)
for ch in range(nch):
for pol in range(npol):
MaskArray[ch, pol, :, :] = np.bool8(
MaskImage[ch, pol].T[::-1].copy())[:, :]
self.ExternalMask = MaskArray
def __init__(
self,
Gain=0.3,
MaxMinorIter=100,
NCPU=6,
CycleFactor=2.5,
FluxThreshold=None,
RMSFactor=3,
PeakFactor=0,
GD=None,
SearchMaxAbs=1,
CleanMaskImage=None,
ImagePolDescriptor=["I"],
ModelMachine=None,
**kw # absorb any unknown keywords arguments into this
):
self.SearchMaxAbs = SearchMaxAbs
self.ModelImage = None
self.MaxMinorIter = MaxMinorIter
self.NCPU = NCPU
self.MaskArray = None
self.GD = GD
self.MultiFreqMode = (self.GD["Freq"]["NBand"] > 1)
self.NFreqBand = self.GD["Freq"]["NBand"]
self.FluxThreshold = FluxThreshold
self.CycleFactor = CycleFactor
self.RMSFactor = RMSFactor
self.PeakFactor = PeakFactor
self.GainMachine = ClassGainMachine.ClassGainMachine(GainMin=Gain)
if ModelMachine is None:
import ClassModelMachineHogbom as ClassModelMachine
self.ModelMachine = ClassModelMachine.ClassModelMachine(
self.GD, GainMachine=self.GainMachine)
else:
self.ModelMachine = ModelMachine
self.GainMachine = self.ModelMachine.GainMachine
self.GiveEdges = GiveEdges.GiveEdges
self._niter = 0
if CleanMaskImage is not None:
print >> log, "Reading mask image: %s" % CleanMaskImage
MaskArray = image(CleanMaskImage).getdata()
nch, npol, _, _ = MaskArray.shape
self._MaskArray = np.zeros(MaskArray.shape, np.bool8)
for ch in range(nch):
for pol in range(npol):
self._MaskArray[ch, pol, :, :] = np.bool8(
1 - MaskArray[ch, pol].T[::-1].copy())[:, :]
self.MaskArray = self._MaskArray[0]
self._peakMode = "normal"
self.CurrentNegMask = None
self._NoiseMap = None
self._PNRStop = None # in _peakMode "sigma", provides addiitonal stopping criterion
def get_rms_noise(imageName):
image = pim.image(imageName)
nfo = image.info()
d = image.getdata()
nstokes = d.shape[1]
nra = d.shape[2]
ndec = d.shape[3]
# bmaj = nfo['imageinfo']['restoringbeam']['major']['value']
# bmin = nfo['imageinfo']['restoringbeam']['minor']['value']
# barea = 2.*np.pi*bmaj*bmin/(2.3548**2)
noises = []
Id = d[0, 0, (nra // 2 - nra // f):(nra // 2 + nra // f)].flatten()
if nstokes == 4:
Qd = d[0, 1, (nra // 2 - nra // f):(nra // 2 + nra // f)].flatten()
Ud = d[0, 2, (nra // 2 - nra // f):(nra // 2 + nra // f)].flatten()
Vd = d[0, 3, (nra // 2 - nra // f):(nra // 2 + nra // f)].flatten()
hrange = (-1, 1)
Ih = np.histogram(Id, bins=100, range=hrange) # 0 = values, 1 = bin edges
Ix = Ih[1][:-1] + 0.5 * (Ih[1][1] - Ih[1][0])
Iv = Ih[0] / float(max(Ih[0]))
# stupid fitting method
Inoise = myfit(Ix, Iv, imageName + '_histI.png')
noises.append(('I', Inoise))
if nstokes == 4:
hrange = (-0.1, 0.1)
Qh = np.histogram(Qd, bins=100,
range=hrange) # 0 = values, 1 = left bin edges
Qx = Qh[1][:-1] + 0.5 * (Qh[1][1] - Qh[1][0])
Qv = Qh[0] / float(max(Qh[0]))
Uh = np.histogram(Ud, bins=100,
range=hrange) # 0 = values, 1 = left bin edges
Ux = Uh[1][:-1] + 0.5 * (Uh[1][1] - Uh[1][0])
Uv = Uh[0] / float(max(Uh[0]))
Vh = np.histogram(Vd, bins=100,
range=hrange) # 0 = values, 1 = left bin edges
Vx = Vh[1][:-1] + 0.5 * (Vh[1][1] - Vh[1][0])
Vv = Vh[0] / float(max(Vh[0]))
Qnoise = myfit(Qx, Qv, imageName + '_histQ.png')
Unoise = myfit(Ux, Uv, imageName + '_histU.png')
Vnoise = myfit(Vx, Vv, imageName + '_histV.png')
noises.append(('Q', Qnoise))
noises.append(('U', Unoise))
noises.append(('V', Vnoise))
return noises
def ComputeNoiseMap(self):
print >> log, "Compute noise map..."
Boost = self.Boost
Acopy = self.Restored[0, 0, 0::Boost, 0::Boost].copy()
SBox = (self.box[0] / Boost, self.box[1] / Boost)
# MeanAbs=scipy.ndimage.filters.mean_filter(np.abs(Acopy),SBox)
# Acopy[Acopy>0]=MeanAbs[Acopy>0]
# Noise=np.sqrt(scipy.ndimage.filters.median_filter(np.abs(Acopy)**2,SBox))
x = np.linspace(-10, 10, 1000)
f = 0.5 * (1. + scipy.special.erf(x / np.sqrt(2.)))
n = SBox[0] * SBox[1]
F = 1. - (1. - f)**n
ratio = np.abs(np.interp(0.5, F, x))
Noise = -scipy.ndimage.filters.minimum_filter(Acopy, SBox) / ratio
#Noise[Noise<0]=0
# indxy=(Acopy>5.*Noise)
# Acopy[indxy]=5*Noise[indxy]
# Noise=np.sqrt(scipy.ndimage.filters.median_filter(np.abs(Acopy)**2,SBox))
# indxy=(Acopy>5.*Noise)
# Acopy[indxy]=5*Noise[indxy]
# Noise=np.sqrt(scipy.ndimage.filters.median_filter(np.abs(Acopy)**2,SBox))
NoiseMed = np.median(Noise)
Noise[Noise < NoiseMed] = NoiseMed
self.Noise = np.zeros_like(self.Restored[0, 0])
for i in range(Boost):
for j in range(Boost):
s00, s01 = Noise.shape
s10, s11 = self.Noise[i::Boost, j::Boost].shape
s0, s1 = min(s00, s10), min(s10, s11)
self.Noise[i::Boost, j::Boost][0:s0, 0:s1] = Noise[:, :][0:s0,
0:s1]
ind = np.where(self.Noise == 0.)
self.Noise[ind] = 1e-10
if self.OutNameNoiseMap != "":
print >> log, "Save noise map as %s" % self.OutNameNoiseMap
self.CasaIm.saveas(self.OutNameNoiseMap)
CasaNoise = image(self.OutNameNoiseMap)
CasaNoise.putdata(self.Noise)
CasaNoise.tofits(self.OutNameNoiseMap + ".fits")
del (CasaNoise)
os.system("rm %s" % self.OutNameNoiseMap)
def get_rms_noise (imageName):
image = pim.image(imageName)
nfo = image.info()
d = image.getdata()
nstokes = d.shape[1]
nra = d.shape[2]
ndec = d.shape[3]
# bmaj = nfo['imageinfo']['restoringbeam']['major']['value']
# bmin = nfo['imageinfo']['restoringbeam']['minor']['value']
# barea = 2.*np.pi*bmaj*bmin/(2.3548**2)
noises = []
Id = d[0,0, (nra/2 - nra/f):(nra/2 + nra/f)].flatten()
if nstokes==4:
Qd = d[0,1, (nra/2 - nra/f):(nra/2 + nra/f)].flatten()
Ud = d[0,2, (nra/2 - nra/f):(nra/2 + nra/f)].flatten()
Vd = d[0,3, (nra/2 - nra/f):(nra/2 + nra/f)].flatten()
hrange = (-1,1)
Ih = np.histogram(Id, bins=100, range=hrange) # 0 = values, 1 = bin edges
Ix = Ih[1][:-1] + 0.5*(Ih[1][1] - Ih[1][0])
Iv = Ih[0]/float(max(Ih[0]))
# stupid fitting method
Inoise = myfit(Ix, Iv, imageName+'_histI.png')
noises.append (('I', Inoise))
if nstokes==4:
hrange = (-0.1, 0.1)
Qh = np.histogram(Qd, bins=100,range=hrange) # 0 = values, 1 = left bin edges
Qx = Qh[1][:-1] + 0.5*(Qh[1][1] - Qh[1][0])
Qv = Qh[0]/float(max(Qh[0]))
Uh = np.histogram(Ud, bins=100, range=hrange) # 0 = values, 1 = left bin edges
Ux = Uh[1][:-1] + 0.5*(Uh[1][1] - Uh[1][0])
Uv = Uh[0]/float(max(Uh[0]))
Vh = np.histogram(Vd, bins=100, range=hrange) # 0 = values, 1 = left bin edges
Vx = Vh[1][:-1] + 0.5*(Vh[1][1] - Vh[1][0])
Vv = Vh[0]/float(max(Vh[0]))
Qnoise = myfit(Qx, Qv, imageName+'_histQ.png')
Unoise = myfit(Ux, Uv, imageName+'_histU.png')
Vnoise = myfit(Vx, Vv, imageName+'_histV.png')
noises.append (('Q', Qnoise))
noises.append (('U', Unoise))
noises.append (('V', Vnoise))
return noises
def getPatchNamesFromMask(mask, RARad, DecRad, root='mask'):
"""
Returns an array of patch names for each (RA, Dec) pair in radians
"""
import math
import pyrap.images as pim
import scipy.ndimage as nd
import numpy as np
maskdata = pim.image(mask)
maskval = maskdata.getdata()[0][0]
act_pixels = maskval
rank = len(act_pixels.shape)
connectivity = nd.generate_binary_structure(rank, rank)
mask_labels, count = nd.label(act_pixels, connectivity)
patchNums = []
patchNames = []
for raRad, decRad in zip(RARad, DecRad):
(a, b, _, _) = maskdata.toworld([0, 0, 0, 0])
(_, _, pixY, pixX) = maskdata.topixel([a, b, decRad, raRad])
try:
# != is a XOR for booleans
patchNums.append(mask_labels[int(pixY), int(pixX)])
except:
patchNums.append(0)
# Check if there is a patch with id = 0. If so, this means there were
# some Gaussians that fell outside of the regions in the patch
# mask file.
n = 0
for p in patchNums:
if p != 0:
in_patch = np.where(patchNums == p)
if pad_index:
patchNames.append(
'{0}_patch_'.format(root) +
str(p).zfill(int(np.ceil(np.log10(len(patchNums))))))
else:
patchNames.append('{0}_patch_'.format(root) + str(p))
else:
patchNames.append('patch_' + str(n))
n += 1
return np.array(patchNames)
def PutDataInNewImage(ImageNameIn, ImageNameOut, data, CorrT=False):
im = image(ImageNameIn)
F = pyfits.open(ImageNameIn)
F0 = F[0]
nx = F0.header["NAXIS1"]
ny = F0.header["NAXIS2"]
npol = F0.header["NAXIS3"]
nch = F0.header["NAXIS4"]
shape = (nch, npol, ny, nx)
Dico = im.coordinates().dict()
cell = abs(Dico["direction0"]["cdelt"][0]) * 180 / np.pi * 3600
ra, dec = Dico["direction0"]["crval"]
CasaImage = ClassCasaimage(ImageNameOut, shape, cell, (ra, dec))
CasaImage.setdata(data, CorrT=CorrT)
CasaImage.ToFits()
CasaImage.close()
def getPatchNamesFromMask(mask, RARad, DecRad, root='mask', pad_index=False):
"""
Returns an array of patch names for each (RA, Dec) pair in radians
"""
import pyrap.images as pim
import scipy.ndimage as nd
import numpy as np
maskdata = pim.image(mask)
maskval = maskdata.getdata()[0][0]
act_pixels = maskval
rank = len(act_pixels.shape)
connectivity = nd.generate_binary_structure(rank, rank)
mask_labels, count = nd.label(act_pixels, connectivity)
patchNums = []
patchNames = []
for raRad, decRad in zip(RARad, DecRad):
(a, b, _, _) = maskdata.toworld([0, 0, 0, 0])
(_, _, pixY, pixX) = maskdata.topixel([a, b, decRad, raRad])
try:
# != is a XOR for booleans
patchNums.append(mask_labels[int(pixY), int(pixX)])
except:
patchNums.append(0)
# Check if there is a patch with id = 0. If so, this means there were
# some Gaussians that fell outside of the regions in the patch
# mask file.
n = 0
for p in patchNums:
if p != 0:
if pad_index:
patchNames.append('{0}_patch_'.format(root) +
str(p).zfill(int(np.ceil(np.log10(len(set(patchNums))+1)))))
else:
patchNames.append('{0}_patch_'.format(root)+str(p))
else:
patchNames.append('patch_'+str(n))
n += 1
return np.array(patchNames)
def setModelImage(self):
print "set model image"
self.im=image(self.Fits)
im=self.im
c=im.coordinates()
dx,_=c.__dict__["_csys"]["direction0"]["cdelt"]
self.CellSizeRad=np.abs(dx)
self.PSFGaussPars=self.ResInPix*self.CellSizeRad,self.ResInPix*self.CellSizeRad,0.
Fits=self.Fits
self.Model=self.im.getdata()[0,0]
if self.XcYcDx!=None:
xc,yc,dx=self.XcYcDx
x0,x1=xc-dx,xc+dx
y0,y1=yc-dx,yc+dx
self.Model=self.Model[x0:x1,y0:y1]
#self.Plot(self.Model)
print " done set model image"
def find_imagenoise(imagename):
"""
Finds noise and dynamic range for an image
Parameters
----------
imagename : str
Filename of image
Returns
-------
rms : float
Noise (Jy/beam) of image
dynamic_range : float
Dynamic range (max/min) of image
"""
im = pim.image(imagename)
image = numpy.copy(im.getdata())
mean, rms = meanclip(image)
return rms, numpy.abs(numpy.max(image)/rms)
def getMaskValues(mask, RARad, DecRad):
"""
Returns an array of mask values for each (RA, Dec) pair in radians.
"""
import math
import pyrap.images as pim
import numpy as np
maskdata = pim.image(mask)
maskval = maskdata.getdata()[0][0]
vals = []
for raRad, decRad in zip(RARad, DecRad):
(a, b, _, _) = maskdata.toworld([0, 0, 0, 0])
(_, _, pixY, pixX) = maskdata.topixel([a, b, decRad, raRad])
try:
if maskval[int(pixY), int(pixX)]:
vals.append(True)
else:
vals.append(False)
except:
vals.append(False)
return np.array(vals)
def getrms(image,facetmask=None):
"""
Return the rms of source-free regions in the image.
image should be a FITS file of the form xxx-image.fits.
xxxnm-fitsmask should exist.
"""
mask=image.replace('-image.fits','nm.fitsmask')
if facetmask is None:
# guess facet mask name
root=image[16:].replace('-image.fits','')
facetmask='templatemask_'+root+'.masktmp'
imhdu=pyfits.open(image)
mkhdu=pyfits.open(mask)
maskim=pi.image(facetmask)
imdata=imhdu[0].data[0,0]
maskdata=mkhdu[0].data[0,0]
fmaskdata=maskim.getdata()[0,0]
assert(imdata.shape==maskdata.shape)
assert(imdata.shape==fmaskdata.shape)
filter=(maskdata==0) & (fmaskdata==1)
mdata=imdata[filter]
return np.std(mdata)
def getrms(image, facetmask=None):
"""
Return the rms of source-free regions in the image.
image should be a FITS file of the form xxx-image.fits.
xxxnm-fitsmask should exist.
"""
mask = image.replace('-image.fits', 'nm.fitsmask')
if facetmask is None:
# guess facet mask name
root = image[16:].replace('-image.fits', '')
facetmask = 'templatemask_' + root + '.masktmp'
imhdu = pyfits.open(image)
mkhdu = pyfits.open(mask)
maskim = pi.image(facetmask)
imdata = imhdu[0].data[0, 0]
maskdata = mkhdu[0].data[0, 0]
fmaskdata = maskim.getdata()[0, 0]
assert (imdata.shape == maskdata.shape)
assert (imdata.shape == fmaskdata.shape)
filter = (maskdata == 0) & (fmaskdata == 1)
mdata = imdata[filter]
return np.std(mdata)
def getMaskValues(mask, RARad, DecRad):
"""
Returns an array of mask values for each (RA, Dec) pair in radians.
"""
import math
import pyrap.images as pim
import numpy as np
maskdata = pim.image(mask)
maskval = maskdata.getdata()[0][0]
vals = []
for raRad, decRad in zip(RARad, DecRad):
(a, b, _, _) = maskdata.toworld([0, 0, 0, 0])
(_, _, pixY, pixX) = maskdata.topixel([a, b, decRad, raRad])
try:
if maskval[pixY, pixX]:
vals.append(True)
else:
vals.append(False)
except:
vals.append(False)
return np.array(vals)
def __init__ (self, path, mode):
try:
from pyrap.images import image
except ImportError:
raise UnsupportedError ('cannot open CASAcore images in Pyrap mode without '
'the Python module "pyrap.images"')
super (PyrapImage, self).__init__ (path, mode)
# no mode specifiable
self._handle = image (path)
allinfo = self._handle.info ()
self.units = maybelower (allinfo.get ('unit'))
self.shape = np.asarray (self._handle.shape (), dtype=np.int)
self.axdescs = []
if 'coordinates' in allinfo:
pc = allinfo['coordinates'].get ('pointingcenter')
# initial=True signifies that the pointing center information
# hasn't actually been initialized.
if pc is not None and not pc['initial']:
# This bit of info doesn't have any metadata about units or
# whatever; appears to be fixed as RA/Dec in radians.
self.pclat = pc['value'][1]
self.pclon = pc['value'][0]
ii = self._handle.imageinfo ()
if 'restoringbeam' in ii:
self.bmaj = _pyrap_convert (ii['restoringbeam']['major'], 'rad')
self.bmin = _pyrap_convert (ii['restoringbeam']['minor'], 'rad')
self.bpa = _pyrap_convert (ii['restoringbeam']['positionangle'], 'rad')
# Make sure that angular units are always measured in radians,
# because anything else is ridiculous.
from pyrap.quanta import quantity
self._wcscale = wcscale = np.ones (self.shape.size)
c = self._handle.coordinates ()
radian = quantity (1., 'rad')
for item in c.get_axes ():
if isinstance (item, six.string_types):
self.axdescs.append (item.replace (' ', '_'))
else:
for subitem in item:
self.axdescs.append (subitem.replace (' ', '_'))
def getconversion (text):
q = quantity (1., text)
if q.conforms (radian):
return q.get_value ('rad')
return 1
i = 0
for item in c.get_unit ():
if isinstance (item, six.string_types):
wcscale[i] = getconversion (item)
i += 1
elif len (item) == 0:
wcscale[i] = 1 # null unit
i += 1
else:
for subitem in item:
wcscale[i] = getconversion (subitem)
i += 1
# Figure out which axes are lat/long/spec. We have some
# paranoia code the give up in case there are multiple axes
# that appear to be of the same type. This stuff could
# be cleaned up.
lat = lon = spec = -1
try:
logspecidx = c.get_names ().index ('spectral')
except ValueError:
specaxname = None
else:
specaxname = c.get_axes ()[logspecidx]
for i, name in enumerate (self.axdescs):
# These symbolic direction names obtained from
# casacore/coordinates/Coordinates/DirectionCoordinate.cc
# Would be nice to have a better system for determining
# this a la what wcslib provides.
if name == specaxname:
spec = i
elif name in ('Right_Ascension', 'Hour_Angle', 'Longitude'):
if lon == -1:
lon = i
else:
lon = -2
elif name in ('Declination', 'Latitude'):
if lat == -1:
lat = i
else:
lat = -2
if lat >= 0:
self._latax = lat
if lon >= 0:
self._lonax = lon
if spec >= 0:
self._specax = spec
# Phew, that was gross.
if self._specax is not None:
sd = c.get_coordinate ('spectral').dict ()
wi = sd.get ('wcs')
if wi is not None:
try:
from mirtask._miriad_c import mirwcs_compute_freq
except ImportError:
pass
else:
spectype = wi['ctype'].replace ('\x00', '')[:4]
restfreq = sd.get ('restfreq', 0.)
specval = self.toworld (0.5 * (self.shape - 1))[self._specax]
self.charfreq = mirwcs_compute_freq (spectype, specval, restfreq) * 1e-9
# TODO: any unit weirdness or whatever here?
self.mjd = c.get_obsdate ()['m0']['value']
#!/usr/bin/python
# Write CASA image to fits
import sys
import pyrap.images as pi
import os.path
args=len(sys.argv)
if (args==1):
print "usage: tofits.py [CASA images]";
sys.exit(1)
for fn in sys.argv[1:]:
print 'Doing',fn
outname=fn+'.fits'
if os.path.isfile(outname):
print '... skip, FITS file already exists'
continue
im=pi.image(fn)
im.tofits(outname)
print '... writing FITS file'
# Quick & dirty inverse-variance weighted image averaging.
# John Swinbank, 2010-07-10
import sys
from numpy import average
from pyrap.images import image
image_data = [
image(file).getdata() for file in sys.argv[2:]
]
result = average(
image_data, axis=0,
weights=[1/data.var() for data in image_data]
)
output = image(
sys.argv[1] + ".img", values=result,
coordsys=image(sys.argv[2]).coordinates()
)
output.tofits(sys.argv[1] + ".fits")
#
# 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 2 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 GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
#usage: extractbeam.py imagename
import pyrap.images as pim
from pyrap import quanta
import sys
for img in sys.argv[1:]:
this_pim = pim.image(img)
info_dict = this_pim.info()['imageinfo']['restoringbeam']
# get beam info
bpar_ma = quanta.quantity(info_dict['major']).get_value('arcsec')
bpar_mi = quanta.quantity(info_dict['minor']).get_value('arcsec')
bpar_pa = quanta.quantity(info_dict['positionangle']).get_value('deg')
print('\n{0} - Beam: maj {1:0.3f} (arcsec), min {2:2.3f} (arcsec), pa {3:0.2f} (deg)'.format(img, bpar_ma, bpar_mi,bpar_pa))
X,Y = np.shape(rawdata)
rawdata = rawdata[Y/3:2*Y/3,X/3:2*X/3]
orig_raw = rawdata
med, std, mask = Median_clip(rawdata, full_output=True, ftol=0.0, max_iter=10, sigma=4)
rawdata[mask==False] = med
v[i]=std
fln.close()
for i in range(0,x):
w[i]=1/v[i]
print "Calculated weights:\n{0}".format(w)
#Gather images
image_data = [
image(file).getdata() for file in y
]
#Write result
result = np.average(
image_data, axis=0,
weights=w
)
output = image(
img_name, values=result,
coordsys=image(y[-1]).coordinates()
)
output.tofits(fits_name)
def _allocate_buffers( imagenames, new_stampsize, nstackpos):
import numpy as np
try:
from taskinit import ia
dataread = 'casa'
except ImportError:
from pyrap.images import image
dataread = 'pyrap'
global skymap
global data
global oldimagenames
global stampsize
global imagesizes
if dataread == 'casa':
ia.open(imagenames[0])
cs = ia.coordsys()
outnchans = ia.boundingbox()['trc'][2]+1
outnstokes = ia.boundingbox()['trc'][3]+1
ia.done()
elif dataread == 'pyrap':
im = image(imagenames[0])
cs = im.coordinates()
outnchans = im.shape()[cs.get_axes().index(cs.get_coordinate('spectral').get_axes())]
outnstokes = im.shape()[cs.get_axes().index(cs.get_coordinate('stokes').get_axes())]
# To improve performance this module will keep buffers between run.
# This following code resets these buffers if they have grown obsolete.
if oldimagenames == []:
oldimagenames = imagenames
if oldimagenames != imagenames:
oldimagenames = imagenames
skymap = []
data = []
if stampsize == 0:
stampsize = new_stampsize
elif stampsize != new_stampsize:
stampsize = new_stampsize
data = []
skymap = []
if not(data == []) and nstackpos != data.shape[0]:
data = []
# If there is no data buffer create one.
# The data buffer is used to save the right stacking positions before stacking them.
# During stacking this is where the full stack will actually be saved.
if data == []:
data = np.zeros((nstackpos, new_stampsize, new_stampsize, outnstokes, outnchans))
else:
data = 0.*data
# If there is no skymap buffer create one.
# This is the data that is most important to buffer.
# Reading a skymap from disk is a time consuming task and we don't want to do this too much.
if skymap == []:
for imagename in imagenames:
if dataread == 'casa':
ia.open(imagename)
skymap.append(ia.getregion())
ia.done()
elif dataread == 'pyrap':
buff = im.getdata()
dir_axis = cs.get_axes().index(cs.get_coordinate('direction').get_axes())
x_axis = dir_axis+cs.get_coordinate('direction').get_axes().index('Right Ascension')
y_axis = dir_axis+cs.get_coordinate('direction').get_axes().index('Declination')
specax = cs.get_axes().index(cs.get_coordinate('spectral').get_axes())
stokesax = cs.get_axes().index(cs.get_coordinate('stokes').get_axes())
axis_order = [x_axis, y_axis, stokesax, specax]
for i in range(len(axis_order)-1):
if axis_order[i] != i:
target = axis_order.index(i)
origin = i
buff = buff.swapaxes(axis_order[origin], axis_order[target])
axis_order[origin], axis_order[target] =\
axis_order[target], axis_order[origin]
skymap.append(buff)
imagesizes = []
for imagename in imagenames:
if dataread == 'casa':
ia.open(imagename)
imagesizes.append((ia.shape()[0], ia.shape()[1]))
ia.done()
elif dataread == 'pyrap':
dir_axis = cs.get_axes().index(cs.get_coordinate('direction').get_axes())
x_axis_index = dir_axis+cs.get_coordinate('direction').get_axes().index('Right Ascension')
y_axis_index = dir_axis+cs.get_coordinate('direction').get_axes().index('Declination')
imagesizes.append((im.shape()[x_axis_index], im.shape()[y_axis_index]))
def main(image_name, mask_name, atrous_do=False, threshisl=0.0, threshpix=0.0, rmsbox=None,
rmsbox_bright=(35, 7), iterate_threshold=False, adaptive_rmsbox=False, img_format='fits',
threshold_format='float', trim_by=0.0, vertices_file=None, atrous_jmax=6,
pad_to_size=None, skip_source_detection=False, region_file=None, nsig=5.0,
reference_ra_deg=None, reference_dec_deg=None):
"""
Make a clean mask and return clean threshold
Parameters
----------
image_name : str
Filename of input image from which mask will be made. If the image does
not exist, a template image with center at (reference_ra_deg,
reference_dec_deg) will be made internally
mask_name : str
Filename of output mask image
atrous_do : bool, optional
Use wavelet module of PyBDSM?
threshisl : float, optional
Value of thresh_isl PyBDSM parameter
threshpix : float, optional
Value of thresh_pix PyBDSM parameter
rmsbox : tuple of floats, optional
Value of rms_box PyBDSM parameter
rmsbox_bright : tuple of floats, optional
Value of rms_box_bright PyBDSM parameter
iterate_threshold : bool, optional
If True, threshold will be lower in 20% steps until
at least one island is found
adaptive_rmsbox : tuple of floats, optional
Value of adaptive_rms_box PyBDSM parameter
img_format : str, optional
Format of output mask image (one of 'fits' or 'casa')
threshold_format : str, optional
Format of output threshold (one of 'float' or 'str_with_units')
trim_by : float, optional
Fraction by which the perimeter of the output mask will be
trimmed (zeroed)
vertices_file : str, optional
Filename of file with vertices (must be a pickle file containing
a dictionary with the vertices in the 'vertices' entry)
atrous_jmax : int, optional
Value of atrous_jmax PyBDSM parameter
pad_to_size : int, optional
Pad output mask image to a size of pad_to_size x pad_to_size
skip_source_detection : bool, optional
If True, source detection is not run on the input image
region_file : str, optional
Filename of region file in CASA format. If given, no mask image
is made (the region file is used as the clean mask)
nsig : float, optional
Number of sigma of returned threshold value
reference_ra_deg : float, optional
RA for center of output mask image
reference_dec_deg : float, optional
Dec for center of output mask image
Returns
-------
result : dict
Dict with nsig-sigma rms threshold
"""
if image_name is not None:
if image_name.lower() == 'none':
image_name = None
if rmsbox is not None and type(rmsbox) is str:
rmsbox = eval(rmsbox)
if type(rmsbox_bright) is str:
rmsbox_bright = eval(rmsbox_bright)
if pad_to_size is not None and type(pad_to_size) is str:
pad_to_size = int(pad_to_size)
if type(atrous_do) is str:
if atrous_do.lower() == 'true':
atrous_do = True
threshisl = 4.0 # override user setting to ensure proper source fitting
else:
atrous_do = False
if type(iterate_threshold) is str:
if iterate_threshold.lower() == 'true':
iterate_threshold = True
else:
iterate_threshold = False
if type(adaptive_rmsbox) is str:
if adaptive_rmsbox.lower() == 'true':
adaptive_rmsbox = True
else:
adaptive_rmsbox = False
if type(skip_source_detection) is str:
if skip_source_detection.lower() == 'true':
skip_source_detection = True
else:
skip_source_detection = False
if reference_ra_deg is not None and reference_dec_deg is not None:
reference_ra_deg = float(reference_ra_deg)
reference_dec_deg = float(reference_dec_deg)
if not os.path.exists(image_name):
print('Input image not found. Making empty image...')
if not skip_source_detection:
print('ERROR: Source detection cannot be done on an empty image')
sys.exit(1)
if reference_ra_deg is not None and reference_dec_deg is not None:
image_name = mask_name + '.tmp'
make_template_image(image_name, reference_ra_deg, reference_dec_deg)
else:
print('ERROR: if image not found, a refernce position must be given')
sys.exit(1)
trim_by = float(trim_by)
atrous_jmax = int(atrous_jmax)
threshpix = float(threshpix)
threshisl = float(threshisl)
nsig = float(nsig)
if not skip_source_detection:
if vertices_file is not None:
# Modify the input image to blank the regions outside of the polygon
temp_img = pim.image(image_name)
image_name += '.blanked'
temp_img.saveas(image_name, overwrite=True)
input_img = pim.image(image_name)
data = input_img.getdata()
vertices = read_vertices(vertices_file)
RAverts = vertices[0]
Decverts = vertices[1]
xvert = []
yvert = []
for RAvert, Decvert in zip(RAverts, Decverts):
pixels = input_img.topixel([1, 1, Decvert*np.pi/180.0,
RAvert*np.pi/180.0])
xvert.append(pixels[2]) # x -> Dec
yvert.append(pixels[3]) # y -> RA
poly = Polygon(xvert, yvert)
# Find masked regions
masked_ind = np.where(data[0, 0])
# Find distance to nearest poly edge and set to NaN those that
# are outside the facet (dist < 0)
dist = poly.is_inside(masked_ind[0], masked_ind[1])
outside_ind = np.where(dist < 0.0)
if len(outside_ind[0]) > 0:
data[0, 0, masked_ind[0][outside_ind], masked_ind[1][outside_ind]] = np.nan
# Save changes
input_img.putdata(data)
if iterate_threshold:
# Start with given threshold and lower it until we get at least one island
nisl = 0
while nisl == 0:
img = bdsm.process_image(image_name, mean_map='zero', rms_box=rmsbox,
thresh_pix=threshpix, thresh_isl=threshisl,
atrous_do=atrous_do, ini_method='curvature', thresh='hard',
adaptive_rms_box=adaptive_rmsbox, adaptive_thresh=150,
rms_box_bright=rmsbox_bright, rms_map=True, quiet=True,
atrous_jmax=atrous_jmax)
nisl = img.nisl
threshpix /= 1.2
threshisl /= 1.2
if threshpix < 5.0:
break
else:
img = bdsm.process_image(image_name, mean_map='zero', rms_box=rmsbox,
thresh_pix=threshpix, thresh_isl=threshisl,
atrous_do=atrous_do, ini_method='curvature', thresh='hard',
adaptive_rms_box=adaptive_rmsbox, adaptive_thresh=150,
rms_box_bright=rmsbox_bright, rms_map=True, quiet=True,
atrous_jmax=atrous_jmax)
if img.nisl == 0:
print('No islands found. Clean mask cannot be made.')
sys.exit(1)
# Check if there are large islands preset (indicating that multi-scale
# clean is needed)
has_large_isl = False
for isl in img.islands:
if isl.size_active > 100:
# Assuming normal sampling, a size of 100 pixels would imply
# a source of ~ 10 beams
has_large_isl = True
if (region_file is not None) and (region_file != '[]'):
# Copy the CASA region file (stripped of brackets, etc.) and return
os.system('cp {0} {1}'.format(region_file.strip('[]"'), mask_name))
if not skip_source_detection:
if threshold_format == 'float':
return {'threshold_5sig': nsig * img.clipped_rms, 'multiscale': has_large_isl}
elif threshold_format == 'str_with_units':
# This is done to get around the need for quotes around strings in casapy scripts
# 'casastr/' is removed by the generic pipeline
return {'threshold_5sig': 'casastr/{0}Jy'.format(nsig * img.clipped_rms),
'multiscale': has_large_isl}
else:
return {'threshold_5sig': '0.0'}
elif not skip_source_detection:
img.export_image(img_type='island_mask', mask_dilation=0, outfile=mask_name,
img_format=img_format, clobber=True)
if vertices_file is not None or trim_by > 0 or pad_to_size is not None or skip_source_detection:
# Alter the mask in various ways
if skip_source_detection:
# Read the image
mask_im = pim.image(image_name)
else:
# Read the PyBDSM mask
mask_im = pim.image(mask_name)
data = mask_im.getdata()
coordsys = mask_im.coordinates()
if reference_ra_deg is not None and reference_dec_deg is not None:
values = coordsys.get_referencevalue()
values[2][0] = reference_dec_deg/180.0*np.pi
values[2][1] = reference_ra_deg/180.0*np.pi
coordsys.set_referencevalue(values)
imshape = mask_im.shape()
del(mask_im)
if pad_to_size is not None:
imsize = pad_to_size
coordsys['direction'].set_referencepixel([imsize/2, imsize/2])
pixmin = (imsize - imshape[2]) / 2
if pixmin < 0:
print("The padded size must be larger than the original size.")
sys.exit(1)
pixmax = pixmin + imshape[2]
data_pad = np.zeros((1, 1, imsize, imsize), dtype=np.float32)
data_pad[0, 0, pixmin:pixmax, pixmin:pixmax] = data[0, 0]
new_mask = pim.image('', shape=(1, 1, imsize, imsize), coordsys=coordsys)
new_mask.putdata(data_pad)
else:
new_mask = pim.image('', shape=imshape, coordsys=coordsys)
new_mask.putdata(data)
data = new_mask.getdata()
if skip_source_detection:
# Mask all pixels
data[:] = 1
if vertices_file is not None:
# Modify the clean mask to exclude regions outside of the polygon
vertices = read_vertices(vertices_file)
RAverts = vertices[0]
Decverts = vertices[1]
xvert = []
yvert = []
for RAvert, Decvert in zip(RAverts, Decverts):
try:
pixels = new_mask.topixel([0, 1, Decvert*np.pi/180.0,
RAvert*np.pi/180.0])
except:
pixels = new_mask.topixel([1, 1, Decvert*np.pi/180.0,
RAvert*np.pi/180.0])
xvert.append(pixels[2]) # x -> Dec
yvert.append(pixels[3]) # y -> RA
poly = Polygon(xvert, yvert)
# Find masked regions
masked_ind = np.where(data[0, 0])
# Find distance to nearest poly edge and unmask those that
# are outside the facet (dist < 0)
dist = poly.is_inside(masked_ind[0], masked_ind[1])
outside_ind = np.where(dist < 0.0)
if len(outside_ind[0]) > 0:
data[0, 0, masked_ind[0][outside_ind], masked_ind[1][outside_ind]] = 0
if trim_by > 0.0:
sh = np.shape(data)
margin = int(sh[2] * trim_by / 2.0 )
data[0, 0, 0:sh[2], 0:margin] = 0
data[0, 0, 0:margin, 0:sh[3]] = 0
data[0, 0, 0:sh[2], sh[3]-margin:sh[3]] = 0
data[0, 0, sh[2]-margin:sh[2], 0:sh[3]] = 0
# Save changes
new_mask.putdata(data)
if img_format == 'fits':
new_mask.tofits(mask_name, overwrite=True)
elif img_format == 'casa':
new_mask.saveas(mask_name, overwrite=True)
else:
print('Output image format "{}" not understood.'.format(img_format))
sys.exit(1)
if not skip_source_detection:
if threshold_format == 'float':
return {'threshold_5sig': nsig * img.clipped_rms, 'multiscale': has_large_isl}
elif threshold_format == 'str_with_units':
# This is done to get around the need for quotes around strings in casapy scripts
# 'casastr/' is removed by the generic pipeline
return {'threshold_5sig': 'casastr/{0}Jy'.format(nsig * img.clipped_rms),
'multiscale': has_large_isl}
else:
return {'threshold_5sig': '0.0'}
def main(args):
# Generate lists of input images and check that they exist
images=[]
avgpbs=[]
psf_fwhm = [] # resolution
frequency = [] # frequency of images (should be equal?)
imagesbase=args.images.split(',')
for base in imagesbase:
images.append(base+'.'+args.extension)
if not os.path.exists(images[-1]):
print("Error: Image",images[-1],"does not exist")
return 1
avgpbs.append(base+'.'+args.avgpbext)
if not os.path.exists(avgpbs[-1]):
print("Error: PB image",avgpbs[-1],"does not exist")
return 1
# Collect weights and invert if requested
if args.weights == '':
weights = np.ones(len(images))
else:
weights = np.array(args.weights.split(',')).astype('float')
if args.invertwt:
weights = 1./weights
if len(weights) != len(images):
print("Error: List of weights is not the same length as list of images.")
return 1
print("Combining images")
formstr = '{0:45s} {1:45s} {2:s} {3:s} {4:s} {5:s}'
print(formstr.format("-----","--------","------------","-------","-------","------"))
print(formstr.format("Image", "PB image","Norm. weight", "Maj(ac)", "Min(ac)","PA(deg)"))
print(formstr.format("-----","--------","------------","-------","-------","------"))
for i in range(len(images)):
this_pim = pim.image(images[i])
info_dict = this_pim.info()['imageinfo']['restoringbeam']
# get beam info
bpar_ma = quanta.quantity(info_dict['major']).get_value('deg')
bpar_mi = quanta.quantity(info_dict['minor']).get_value('deg')
bpar_pa = quanta.quantity(info_dict['positionangle']).get_value('deg')
psf_fwhm.append([bpar_ma, bpar_mi, bpar_pa])
frequency.append(this_pim.info()['coordinates']['spectral2']['restfreq'])
print('{0:45.45s} {1:45.45s} {2:0.2f} {3:0.2f} {4:0.2f} {5:0.2f}'.format(images[i], avgpbs[i], weights[i]/sum(weights), bpar_ma*60, bpar_mi*60,bpar_pa))
psf_fwhm = np.array(psf_fwhm)
frequency = np.array(frequency)
mean_psf_fwhm = np.mean(psf_fwhm, axis=0)
mean_frequency = np.mean(frequency)
print('\nmean Beam: {0:0.3f} maj (arcmin), {1:2.3f} min (arcmin), {2:0.2f} pa (deg)'.format(mean_psf_fwhm[0]*60, mean_psf_fwhm[1]*60, mean_psf_fwhm[2]))
print('(Frequency (MHz):', mean_frequency*1e-6)
if np.max(mean_frequency-frequency)/mean_frequency > 1e-6:
print('\n\nWARNING.\nAre you using images from different bands?')
print('Frequencies (Hz):', frequency)
# Initialize some vectors
declims = [] # store the limits of the declination axes
ralims = [] # store the limits of the r.a. axes
rainc = [] # store the r.a. increments in case they differ
decinc = [] # store the dec increments in case they differ
pims = [] # stores the pyrap images of the data
ppbs = [] # stores the pyrap images of the pb images
# Get image frames for input images
for im, pb in zip(images, avgpbs):
image = pim.image(im)
sptcoords = image.coordinates().get_coordinate('spectral')
nc = sptcoords.get_axis_size()
assert(sptcoords.get_image_axis() == 0)
# Get Stokes axis. Ensure we are working with the Stokes parameter requested.
stkcoords = image.coordinates().get_coordinate('stokes')
assert(stkcoords.get_image_axis() == 1)
if stkcoords.get_axis_size() == 1:
assert(stkcoords.get_stokes()[0] == args.stokes)
else:
stks = stkcoords.get_stokes().index(args.stokes)
image = image.subimage(blc=(0, stks), trc=(nc-1, stks), dropdegenerate=False)
ns = 1
dircoords = image.coordinates().get_coordinate('direction')
nx = dircoords.get_axis_size(axis=1)
ny = dircoords.get_axis_size(axis=0)
inc = dircoords.get_increment()
ref = dircoords.get_referencepixel()
val = dircoords.get_referencevalue()
ra_axis = (list(range(nx))-ref[1])*inc[1]+val[1]
dec_axis = (list(range(ny))-ref[0])*inc[0]+val[0]
rainc.append(inc[1])
decinc.append(inc[0])
declims.append(min(dec_axis))
declims.append(max(dec_axis))
mean_ra = np.mean(ra_axis)
ralims.append((min(ra_axis)-mean_ra)*np.cos(val[0])+mean_ra)
ralims.append((max(ra_axis)-mean_ra)*np.cos(val[0])+mean_ra)
pims.append(image)
ppbs.append(pim.image(pb))
# Generate the mosaic coordinate frame
master_dec = np.arange(min(declims),max(declims),min(decinc))
if max(ralims)-min(ralims) > 5.*np.pi/3.: # crossed RA=0
print("Warning: I think the mosaic crosses RA=0, treating the coordinates as such.")
#ralims[ralims>np.pi] -= 2.*np.pi
for i in range(len(ralims)):
if ralims[i]>np.pi: ralims[i] = ralims[i]-2.*np.pi
master_ra = np.arange(max(ralims),min(ralims),max(rainc))
if args.verbose:
print("Found ra,dec pixel increments (arcsec):")
print(np.array(rainc)*206265.)
print(np.array(decinc)*206265.)
ma = pims[-1].coordinates()
ma['direction'].set_referencepixel([len(master_dec)/2,len(master_ra)/2])
ma['direction'].set_increment([min(decinc),max(rainc)])
ma['direction'].set_referencevalue([master_dec[len(master_dec)/2],master_ra[len(master_ra)/2]])
if args.NCP:
print('Setting NCP projection is not yet working ....')
#ma['direction'].set_projection('ZEA')
# Initialize the arrays for the output image, sensitivity, and weights
master_im = np.zeros((len(master_dec),len(master_ra)))
master_weight = np.zeros((len(master_dec),len(master_ra)))
master_sens = np.zeros((len(master_dec),len(master_ra)))
# Reproject the images onto the master grid, weight and normalize
for i in range(len(pims)):
im = pims[i].regrid([2,3],ma,outshape=(nc,ns,len(master_dec),len(master_ra)))
pb = ppbs[i].regrid([2,3],ma,outshape=(nc,ns,len(master_dec),len(master_ra)))
imdata = np.squeeze(im.getdata())
pbdata = np.squeeze(pb.getdata())
newim = imdata
newpb = pbdata
newwt = (weights[i]*newpb)**2
master_im += newim*newwt
master_sens += newpb*newwt
master_weight += newwt
inds = master_weight != 0.
master_im[inds] /= master_weight[inds]
master_sens[inds] /= master_weight[inds]
# Show image if requested
if args.plotimg:
plt.imshow(master_im,vmin=0.,vmax=0.5)
plt.show()
# Write fits files
arrax = np.zeros( (1,1, len(master_im[:,0]), len(master_im[0,:])) )
arrax[0,0,:,:] = master_im
# Open new casa image for mosaic
new_pim = pim.image('',shape=(1,1, len(master_dec),len(master_ra)), coordsys=ma)
new_pim.putdata(arrax)
# Write fits
new_pim.tofits(args.outfits, overwrite=True)
# Same for sensitivity
new_pim_sens = pim.image('',shape=(1,1,len(master_dec),len(master_ra)),coordsys=ma)
arrax[0,0,:,:] = master_sens
new_pim_sens.putdata(arrax) #
new_pim_sens.tofits(args.sensfits, overwrite=True)
# need to add new beam info (not sure if this is possible with pyrap)
hdu = pyfits.open(args.outfits,mode='update')
header = hdu[0].header
header.update('BMAJ',mean_psf_fwhm[0])
header.update('BMIN',mean_psf_fwhm[1])
header.update('BPA',mean_psf_fwhm[2])
header.update('BUNIT',pims[-1].info()['unit'])
header.update('RESTFRQ',mean_frequency)
header.update('RESTFREQ',mean_frequency)
newhdu = pyfits.PrimaryHDU(data=hdu[0].data, header=header)
newhdu.writeto(args.outfits,clobber=True)
return
#
# Copyright (C) 2013 - Francesco de Gasperin
#
# 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 2 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 GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
# usage: extractbeam.py imagename
import pyrap.images as pim
from pyrap import quanta
import sys
this_pim = pim.image(sys.argv[1])
info_dict = this_pim.info()["imageinfo"]["restoringbeam"]
# get beam info
bpar_ma = quanta.quantity(info_dict["major"]).get_value("arcsec")
bpar_mi = quanta.quantity(info_dict["minor"]).get_value("arcsec")
bpar_pa = quanta.quantity(info_dict["positionangle"]).get_value("deg")
print "\nmean Beam: {0:0.3f} maj (arcsec), {1:2.3f} min (arcsec), {2:0.2f} pa (deg)".format(bpar_ma, bpar_mi, bpar_pa)
def run(self, awimager_output, ms_per_image, sourcelist, target,
output_image, minbaseline, maxbaseline, processed_ms_dir,
fillrootimagegroup_exec, environment, sourcedb, concat_ms,
correlated_output_location, msselect_executable):
self.environment.update(environment)
"""
:param awimager_output: Path to the casa image produced by awimager
:param ms_per_image: The X (90) measurements set scheduled to
create the image
:param sourcelist: list of sources found in the image
:param target: <unused>
:param minbaseline: Minimum baseline used for the image
:param maxbaseline: largest/maximum baseline used for the image
:param processed_ms_dir: The X (90) measurements set actually used to
create the image
:param fillrootimagegroup_exec: Executable used to add image data to
the hdf5 image
:rtype: self.outputs['hdf5'] set to "succes" to signal node succes
:rtype: self.outputs['image'] path to the produced hdf5 image
"""
with log_time(self.logger):
ms_per_image_map = DataMap.load(ms_per_image)
# *****************************************************************
# 1. add image info
# Get all the files in the processed measurement dir
file_list = os.listdir(processed_ms_dir)
processed_ms_paths = []
ms_per_image_map.iterator = DataMap.SkipIterator
for item in ms_per_image_map:
ms_path = item.file
processed_ms_paths.append(ms_path)
#add the information the image
try:
self.logger.debug("Start addImage Info")
addimg.addImagingInfo(awimager_output, processed_ms_paths,
sourcedb, minbaseline, maxbaseline)
except Exception, error:
self.logger.warn("addImagingInfo Threw Exception:")
self.logger.warn(error)
# Catch raising of already done error: allows for rerunning
# of the recipe
if "addImagingInfo already done" in str(error):
self.logger.warn("addImagingInfo already done, continue")
pass
else:
raise Exception(error)
#The majority of the tables is updated correctly
# ***************************************************************
# 2. convert to hdf5 image format
output_directory = None
pim_image = pim.image(awimager_output)
try:
self.logger.info("Saving image in HDF5 Format to: {0}" .format(
output_image))
# Create the output directory
output_directory = os.path.dirname(output_image)
create_directory(output_directory)
# save the image
pim_image.saveas(output_image, hdf5=True)
except Exception, error:
self.logger.error(
"Exception raised inside pyrap.images: {0}".format(
str(error)))
raise error
def main(args):
# Generate lists of input images and check that they exist
images=[]
avgpbs=[]
psf_fwhm = [] # resolution
frequency = [] # frequency of images (should be equal?)
#imagesbase=args.images.split(',')
#for base in imagesbase:
# images.append(base+'.'+args.extension)
# if not os.path.exists(images[-1]):
# print "Error: Image",images[-1],"does not exist"
# return 1
# avgpbs.append(base+'0.'+args.avgpbext)
# if not os.path.exists(avgpbs[-1]):
# print "Error: PB image",avgpbs[-1],"does not exist"
# return 1
# images = ['imfield0_clusterRX42_patch_s163.image.tt0','imfield0_clusterRX42_patch_s188.image.tt0',\
# 'imfield0_clusterRX42_patch_s92.image.tt0','imfield0_clusterRX42_patch_s204.image.tt0', \
# 'imfield0_clusterRX42_patch_s101.image.tt0','imfield0_clusterRX42_patch_s323.image.tt0',\
# 'imfield0_clusterRX42_patch_s184.image.tt0','imfield0_clusterRX42_patch_s301.image.tt0',\
# 'imfield0_clusterRX42_patch_s351.image.tt0','imfield0_clusterRX42_patch_s35.image.tt0',\
# 'imfield0_clusterRX42_patch_s86.image.tt0','imfield0_clusterRX42_patch_s25.image.tt0',\
# 'imfield0_clusterRX42_patch_s182.image.tt0','imfield0_clusterRX42_patch_s71.image.tt0',\
# 'imfield0_clustersRX42_patch_s0.image.tt0','imfield0_clusterRX42_patch_s180.image.tt0',\
# 'imfield0_clusterRX42_patch_s259.image.tt0','imfield0_clusterRX42_patch_s338.image.tt0',\
# 'imfield0_clusterRX42_patch_s377.image.tt0','imfield0_clusterRX42_patch_s337.image.tt0',\
# 'imfield0_clusterRX42_patch_s223.image.tt0']
images = sorted(glob.glob('templatemask_*.masktmp'))
# avgpbs = ['templatemask_RX42_SB180-189.RX42_patch_s163.masktmp',\
# 'templatemask_RX42_SB180-189.RX42_patch_s188.masktmp',\
# 'templatemask_RX42_SB180-189.RX42_patch_s92.masktmp', \
# 'templatemask_RX42_SB180-189.RX42_patch_s204.masktmp',\
# 'templatemask_RX42_SB180-189.RX42_patch_s101.masktmp',\
# 'templatemask_RX42_SB180-189.RX42_patch_s323.masktmp',\
# 'templatemask_RX42_SB180-189.RX42_patch_s184.masktmp',\
# 'templatemask_RX42_SB180-189.RX42_patch_s301.masktmp',\
# 'templatemask_RX42_SB180-189.RX42_patch_s351.masktmp',\
# 'templatemask_RX42_SB180-189.RX42_patch_s35.masktmp',\
# 'templatemask_RX42_SB180-189.RX42_patch_s86.masktmp',\
# 'templatemask_RX42_SB180-189.RX42_patch_s25.masktmp',\
# 'templatemask_RX42_SB180-189.RX42_patch_s182.masktmp',\
# 'templatemask_RX42_SB180-189.RX42_patch_s71.masktmp',\
# 'templatemask_RX42_SB180-189.sRX42_patch_s0.masktmp',\
# 'templatemask_RX42_SB180-189.RX42_patch_s180.masktmp',\
# 'templatemask_RX42_SB180-189.RX42_patch_s259.masktmp',\
# 'templatemask_RX42_SB180-189.RX42_patch_s338.masktmp',\
# 'templatemask_RX42_SB180-189.RX42_patch_s377.masktmp',\
# 'templatemask_RX42_SB180-189.RX42_patch_s337.masktmp',\
# 'templatemask_RX42_SB180-189.RX42_patch_s223.masktmp']
avgpbs = []
srcints = []
for im in images:
tmp = im.split('_')
#print tmp
tmp = tmp[1]
#tmp = tmp.split('cluster')
#print tmp
#tmp = tmp[1]
tmp = tmp.split('.')
#print tmp
src = tmp[0]
srcint = int(src.replace('s',''))
srcints.append(srcint)
#print tmp
#maskn = 'templatemask_' + src + '.masktmp'
maskn = im
#maskn2 = 'templatemask_' + src + '.masktmp3'
#print maskn
#if os.path.isdir('../' + maskn2):
#maskn = maskn2
avgpbs.append( maskn)
#print maskn
#avgpbs.app = sorted(glob.glob('templatemask_*.masktmp'))
#print avgpbs
# Collect weights and invert if requested
if args.weights == '':
weights = np.ones(len(images))
else:
weights = np.array(args.weights.split(',')).astype('float')
if args.invertwt:
weights = 1./weights
if len(weights) != len(images):
print "Error: List of weights is not the same length as list of images."
return 1
print "Combining images"
formstr = '{0:45s} {1:45s}'
print formstr.format("-----","--------")
print formstr.format("Image", "PB image")
print formstr.format("-----","--------")
for i in range(len(images)):
this_pim = pim.image(images[i])
#info_dict = this_pim.info()['imageinfo']['restoringbeam']
# get beam info
#bpar_ma = quanta.quantity(info_dict['major']).get_value('deg')
#bpar_mi = quanta.quantity(info_dict['minor']).get_value('deg')
#bpar_pa = quanta.quantity(info_dict['positionangle']).get_value('deg')
#psf_fwhm.append([bpar_ma, bpar_mi, bpar_pa])
frequency.append(this_pim.info()['coordinates']['spectral2']['restfreq'])
#print '{0:45.45s} {1:45.45s} {2:0.2f} {3:0.2f} {4:0.2f} {5:0.2f}'.format(images[i], avgpbs[i], weights[i]/sum(weights), bpar_ma*60, bpar_mi*60,bpar_pa)
print '{0:45.45s} {1:45.45s}'.format(images[i], avgpbs[i])
#psf_fwhm = np.array(psf_fwhm)
frequency = np.array(frequency)
#mean_psf_fwhm = np.mean(psf_fwhm, axis=0)
mean_frequency = np.mean(frequency)
#print '\nmean Beam: {0:0.3f} maj (arcmin), {1:2.3f} min (arcmin), {2:0.2f} pa (deg)'.format(mean_psf_fwhm[0]*60, mean_psf_fwhm[1]*60, mean_psf_fwhm[2])
print '(Frequency (MHz):', mean_frequency*1e-6
if np.max(mean_frequency-frequency)/mean_frequency > 1e-6:
print '\n\nWARNING.\nAre you using images from different bands?'
print 'Frequencies (Hz):', frequency
time.sleep(2) # give user time to see this ...
# Initialize some vectors
declims = [] # store the limits of the declination axes
ralims = [] # store the limits of the r.a. axes
rainc = [] # store the r.a. increments in case they differ
decinc = [] # store the dec increments in case they differ
pims = [] # stores the pyrap images of the data
ppbs = [] # stores the pyrap images of the pb images
# Get image frames for input images
for im, pb in zip(images, avgpbs):
image = pim.image(im)
sptcoords = image.coordinates().get_coordinate('spectral')
nc = sptcoords.get_axis_size()
assert(sptcoords.get_image_axis() == 0)
# Get Stokes axis. Ensure we are working with the Stokes parameter requested.
#stkcoords = image.coordinates().get_coordinate('stokes')
#assert(stkcoords.get_image_axis() == 1)
#if stkcoords.get_axis_size() == 1:
#assert(stkcoords.get_stokes()[0] == args.stokes)
#else:
#stks = stkcoords.get_stokes().index(args.stokes)
#image = image.subimage(blc=(0, stks), trc=(nc-1, stks), dropdegenerate=False)
ns = 1
dircoords = image.coordinates().get_coordinate('direction')
nx = dircoords.get_axis_size(axis=1)
ny = dircoords.get_axis_size(axis=0)
inc = dircoords.get_increment()
ref = dircoords.get_referencepixel()
val = dircoords.get_referencevalue()
ra_axis = (range(nx)-ref[1])*inc[1]+val[1]
dec_axis = (range(ny)-ref[0])*inc[0]+val[0]
rainc.append(inc[1])
decinc.append(inc[0])
declims.append(min(dec_axis))
declims.append(max(dec_axis))
mean_ra = np.mean(ra_axis)
ralims.append((min(ra_axis)-mean_ra)*np.cos(val[0])+mean_ra)
ralims.append((max(ra_axis)-mean_ra)*np.cos(val[0])+mean_ra)
pims.append(image)
ppbs.append(pim.image(pb))
# Generate the mosaic coordinate frame
master_dec = np.arange(min(declims),max(declims),min(decinc))
if max(ralims)-min(ralims) > 5.*np.pi/3.: # crossed RA=0
print "Warning: I think the mosaic crosses RA=0, treating the coordinates as such."
#ralims[ralims>np.pi] -= 2.*np.pi
for i in range(len(ralims)):
if ralims[i]>np.pi: ralims[i] = ralims[i]-2.*np.pi
master_ra = np.arange(max(ralims),min(ralims),max(rainc))
if args.verbose:
print "Found ra,dec pixel increments (arcsec):"
print np.array(rainc)*206265.,np.array(decinc)*206265.
ma = pims[-1].coordinates()
ma['direction'].set_referencepixel([len(master_dec)/2,len(master_ra)/2])
ma['direction'].set_increment([min(decinc),max(rainc)])
ma['direction'].set_referencevalue([master_dec[len(master_dec)/2],master_ra[len(master_ra)/2]])
#if args.NCP:
#print 'Setting NCP projection is not yet working ....'
#ma['direction'].set_projection('ZEA')
# Initialize the arrays for the output image, sensitivity, and weights
master_im = np.zeros((len(master_dec),len(master_ra)))
master_weight = np.zeros((len(master_dec),len(master_ra)))
master_sens = np.zeros((len(master_dec),len(master_ra)))
# Reproject the images onto the master grid, weight and normalize
for i in range(len(pims)):
im = pims[i].regrid([2,3],ma,outshape=(nc,ns,len(master_dec),len(master_ra)))
pb = ppbs[i].regrid([2,3],ma,outshape=(nc,ns,len(master_dec),len(master_ra)))
imdata = np.squeeze(im.getdata())
pbdata = np.squeeze(pb.getdata())
newim = imdata * srcints[i] # scale by src number
newpb = pbdata
newwt = (weights[i]*newpb)**2
master_im += newim*newwt
master_sens += newpb*newwt
master_weight += newwt
inds = master_weight != 0.
inds_2 = np.where(master_weight == 0.0)
#inds_2 = master_weight == 0.
master_im[inds] /= master_weight[inds]
master_sens[inds] /= master_weight[inds]
print 'HH', inds_2
master_im[inds_2] = np.nan
# Show image if requested
if args.plotimg:
plt.imshow(master_im,vmin=0.,vmax=0.5)
plt.show()
# Write fits files
arrax = np.zeros( (1,1, len(master_im[:,0]), len(master_im[0,:])) )
arrax[0,0,:,:] = master_im
print 'max', np.max(arrax)
# Open new casa image for mosaic
new_pim = pim.image('',shape=(1,1, len(master_dec),len(master_ra)), coordsys=ma)
new_pim.putdata(arrax)
# Write fits
new_pim.tofits(args.outfits, overwrite=True)
# Same for sensitivity
new_pim_sens = pim.image('',shape=(1,1,len(master_dec),len(master_ra)),coordsys=ma)
arrax[0,0,:,:] = master_sens
new_pim_sens.putdata(arrax) #
new_pim_sens.tofits(args.sensfits, overwrite=True)
# need to add new beam info (not sure if this is possible with pyrap)
hdu = pyfits.open(args.outfits,mode='update')
header = hdu[0].header
#header.update('BMAJ',mean_psf_fwhm[0])
#header.update('BMIN',mean_psf_fwhm[1])
#header.update('BPA',mean_psf_fwhm[2])
#header.update('BUNIT',pims[-1].info()['unit'])
header.update('RESTFRQ',mean_frequency)
header.update('RESTFREQ',mean_frequency)
newhdu = pyfits.PrimaryHDU(data=hdu[0].data, header=header)
newhdu.writeto(args.outfits,clobber=True)
return
def main(args):
if args.plotimg:
import pylab as plt
# Generate lists of input images and check that they exist
images = []
avgpbs = []
psf_fwhm = [] # resolution
frequency = [] # frequency of images (should be equal?)
# We determine if list of images is passed as a file or as an actual list
if args.images.find(",") == -1:
imagesbase = np.loadtxt(args.images, dtype=str)
else:
imagesbase = args.images.split(",")
for base in imagesbase:
images.append(base + "." + args.extension)
if not os.path.exists(images[-1]):
print "Error: Image", images[-1], "does not exist"
return 1
avgpbs.append(base + "0." + args.avgpbext)
if not os.path.exists(avgpbs[-1]):
print "Error: PB image", avgpbs[-1], "does not exist"
return 1
# Collect weights and invert if requested
if args.weights == "":
weights = np.ones(len(images))
else:
weights = np.array(args.weights.split(",")).astype("float")
if args.invertwt:
weights = 1.0 / weights
if len(weights) != len(images):
print "Error: List of weights is not the same length as list of images."
return 1
print "Combining images"
formstr = "{0:45s} {1:45s} {2:s} {3:s} {4:s} {5:s}"
print formstr.format("-----", "--------", "------------", "-------", "-------", "------")
print formstr.format("Image", "PB image", "Norm. weight", "Maj(ac)", "Min(ac)", "PA(deg)")
print formstr.format("-----", "--------", "------------", "-------", "-------", "------")
for i in range(len(images)):
this_pim = pim.image(images[i])
info_dict = this_pim.info()["imageinfo"]["restoringbeam"]
# get beam info
bpar_ma = quanta.quantity(info_dict["major"]).get_value("deg")
bpar_mi = quanta.quantity(info_dict["minor"]).get_value("deg")
bpar_pa = quanta.quantity(info_dict["positionangle"]).get_value("deg")
psf_fwhm.append([bpar_ma, bpar_mi, bpar_pa])
frequency.append(this_pim.info()["coordinates"]["spectral2"]["restfreq"])
print "{0:45.45s} {1:45.45s} {2:0.2f} {3:0.2f} {4:0.2f} {5:0.2f}".format(
images[i], avgpbs[i], weights[i] / sum(weights), bpar_ma * 60, bpar_mi * 60, bpar_pa
)
psf_fwhm = np.array(psf_fwhm)
frequency = np.array(frequency)
mean_psf_fwhm = np.mean(psf_fwhm, axis=0)
mean_frequency = np.mean(frequency)
print "\nmean Beam: {0:0.3f} maj (arcmin), {1:2.3f} min (arcmin), {2:0.2f} pa (deg)".format(
mean_psf_fwhm[0] * 60, mean_psf_fwhm[1] * 60, mean_psf_fwhm[2]
)
print "(Frequency (MHz):", mean_frequency * 1e-6
if np.max(mean_frequency - frequency) / mean_frequency > 1e-6:
print "\n\nWARNING.\nAre you using images from different bands?"
print "Frequencies (Hz):", frequency
time.sleep(2) # give user time to see this ...
# Initialize some vectors
declims = [] # store the limits of the declination axes
# ralims = [] # store the limits of the r.a. axes
raleft = []
raright = []
rainc = [] # store the r.a. increments in case they differ
decinc = [] # store the dec increments in case they differ
pims = [] # stores the pyrap images of the data
ppbs = [] # stores the pyrap images of the pb images
# Get image frames for input images
for im, pb in zip(images, avgpbs):
image = pim.image(im)
sptcoords = image.coordinates().get_coordinate("spectral")
nc = sptcoords.get_axis_size()
assert sptcoords.get_image_axis() == 0
# Get Stokes axis. Ensure we are working with the Stokes parameter requested.
stkcoords = image.coordinates().get_coordinate("stokes")
assert stkcoords.get_image_axis() == 1
if stkcoords.get_axis_size() == 1:
assert stkcoords.get_stokes()[0] == args.stokes
else:
stks = stkcoords.get_stokes().index(args.stokes)
image = image.subimage(blc=(0, stks), trc=(nc - 1, stks), dropdegenerate=False)
ns = 1
dircoords = image.coordinates().get_coordinate("direction")
nx = dircoords.get_axis_size(axis=1)
ny = dircoords.get_axis_size(axis=0)
inc = dircoords.get_increment()
ref = dircoords.get_referencepixel()
val = dircoords.get_referencevalue()
ra_axis = (range(nx) - ref[1]) * inc[1] + val[1]
dec_axis = (range(ny) - ref[0]) * inc[0] + val[0]
rainc.append(inc[1])
decinc.append(inc[0])
declims.append(min(dec_axis))
declims.append(max(dec_axis))
mean_ra = np.mean(ra_axis)
# ralims.append((min(ra_axis)-mean_ra)*np.cos(val[0])+mean_ra)
# ralims.append((max(ra_axis)-mean_ra)*np.cos(val[0])+mean_ra)
raleft.append((ra_axis[0] - mean_ra) * np.cos(val[0]) + mean_ra)
raright.append((ra_axis[-1] - mean_ra) * np.cos(val[0]) + mean_ra)
pims.append(image)
ppbs.append(pim.image(pb))
# Generate the mosaic coordinate frame
if not args.NCP:
print ("Using the regular mosaic mode.")
master_dec = np.arange(min(declims), max(declims), min(decinc))
if max(raleft) - min(raright) > 5.0 * np.pi / 3.0: # crossed RA=0
print "Warning: I think the mosaic crosses RA=0, treating the coordinates as such."
##ralims[ralims>np.pi] -= 2.*np.pi
# for i in range(len(ralims)):
# if ralims[i]>np.pi: ralims[i] = ralims[i]-2.*np.pi
for i in range(len(raright)):
raright[i] = raright[i] - 2.0 * np.pi
master_ra = np.arange(max(raleft), min(raright), max(rainc))
lmra = len(master_ra)
if args.maxwidth != 0:
if lmra > args.maxwidth:
xboundary = (lmra - args.maxwidth) / 2
master_ra = master_ra[xboundary:-xboundary]
if args.verbose:
print "Found ra,dec pixel increments (arcsec):"
print np.array(rainc) * 206265.0, np.array(decinc) * 206265.0
ma = pims[-1].coordinates()
ma["direction"].set_referencepixel([len(master_dec) / 2, len(master_ra) / 2])
ma["direction"].set_increment([decinc[np.argmin(np.abs(decinc))], rainc[np.argmin(np.abs(rainc))]])
ma["direction"].set_referencevalue([master_dec[len(master_dec) / 2], master_ra[len(master_ra) / 2]])
else:
print ("Using the special NCP mosaic mode.")
ra_width = 20.0 / 180 * np.pi
dec_width = 20.0 / 180 * np.pi
rainc = rainc[np.argmin(np.abs(rainc))]
decinc = decinc[np.argmin(np.abs(decinc))]
ra_imsize = int(ra_width / np.abs(rainc))
dec_imsize = int(dec_width / np.abs(decinc))
master_ra = np.arange(ra_imsize, dtype=float) / ra_imsize * rainc - ra_width / 2
master_dec = np.arange(dec_imsize, dtype=float) / dec_imsize * decinc - dec_width / 2
ma = pims[-1].coordinates()
ma["direction"].set_referencevalue([np.pi / 2, 0.0])
ma["direction"].set_increment([decinc, rainc])
ma["direction"].set_referencepixel([dec_imsize / 2.0, ra_imsize / 2.0])
# Initialize the arrays for the output image, sensitivity, and weights
master_im = np.zeros((len(master_dec), len(master_ra)))
master_weight = np.zeros((len(master_dec), len(master_ra)))
master_sens = np.zeros((len(master_dec), len(master_ra)))
# Reproject the images onto the master grid, weight and normalize
for i in range(len(pims)):
im = pims[i].regrid([2, 3], ma, outshape=(nc, ns, len(master_dec), len(master_ra)))
pb = ppbs[i].regrid([2, 3], ma, outshape=(nc, ns, len(master_dec), len(master_ra)))
imdata = np.squeeze(im.getdata())
pbdata = np.squeeze(pb.getdata())
newim = imdata
newpb = pbdata
newwt = (weights[i] * newpb) ** 2
master_im += newim * newwt
master_sens += newpb * newwt
master_weight += newwt
inds = master_weight != 0.0
master_im[inds] /= master_weight[inds]
master_sens[inds] /= master_weight[inds]
# Show image if requested
if args.plotimg:
plt.imshow(master_im, vmin=0.0, vmax=0.5)
plt.show()
# Write fits files
arrax = np.zeros((1, 1, len(master_im[:, 0]), len(master_im[0, :])))
arrax[0, 0, :, :] = master_im
# Open new casa image for mosaic
new_pim = pim.image("", shape=(1, 1, len(master_dec), len(master_ra)), coordsys=ma)
new_pim.putdata(arrax)
# Write fits
new_pim.tofits(args.outfits, overwrite=True)
# Same for sensitivity
new_pim_sens = pim.image("", shape=(1, 1, len(master_dec), len(master_ra)), coordsys=ma)
arrax[0, 0, :, :] = master_sens
new_pim_sens.putdata(arrax) #
new_pim_sens.tofits(args.sensfits, overwrite=True)
# need to add new beam info (not sure if this is possible with pyrap)
hdu = pyfits.open(args.outfits, mode="update")
header = hdu[0].header
header.update("BMAJ", mean_psf_fwhm[0])
header.update("BMIN", mean_psf_fwhm[1])
header.update("BPA", mean_psf_fwhm[2])
header.update("BUNIT", pims[-1].info()["unit"])
header.update("RESTFRQ", mean_frequency)
header.update("RESTFREQ", mean_frequency)
newhdu = pyfits.PrimaryHDU(data=hdu[0].data, header=header)
newhdu.writeto(args.outfits, clobber=True)
return
def _msss_mask(self, mask_file_path, sourcedb_path, mask_patch_size = 1.0):
"""
Fill casa image with a mask based on skymodel(sourcedb)
Bugs: [email protected]
pipeline implementation [email protected]
version 0.32
Edited by JDS, 2012-03-16:
- Properly convert maj/minor axes to half length
- Handle empty fields in sky model by setting them to 0
- Fix off-by-one error at mask boundary
FIXED BUG
- if a source is outside the mask, the script ignores it
- if a source is on the border, the script draws only the inner part
- can handle skymodels with different headers
KNOWN BUG
- not works with single line skymodels, workaround: add a fake
source outside the field
- mask patched display large amounts of aliasing. A possible
sollution would
be normalizing to pixel centre. ( int(normalize_x * npix) /
npix + (0.5 /npix))
ideally the patch would increment in pixel radiuses
Version 0.3 (Wouter Klijn, [email protected])
- Usage of sourcedb instead of txt document as 'source' of sources
This allows input from different source sources
Version 0.31 (Wouter Klijn, [email protected])
- Adaptable patch size (patch size needs specification)
- Patch size and geometry is broken: needs some astronomer magic to
fix it, problem with afine transformation prol.
Version 0.32 (Wouter Klijn, [email protected])
- Renaming of variable names to python convention
"""
# increment in maj/minor axes [arcsec]
pad = 500.
# open mask
mask = pim.image(mask_file_path, overwrite = True)
mask_data = mask.getdata()
xlen, ylen = mask.shape()[2:]
freq, stokes, null, null = mask.toworld([0, 0, 0, 0])
# Open the sourcedb:
table = pt.table(sourcedb_path + "::SOURCES")
pdb = lofar.parmdb.parmdb(sourcedb_path)
# Get the data of interest
source_list = table.getcol("SOURCENAME")
source_type_list = table.getcol("SOURCETYPE")
# All date in the format valuetype:sourcename
all_values_dict = pdb.getDefValues()
# Loop the sources
for source, source_type in zip(source_list, source_type_list):
if source_type == 1:
type_string = "Gaussian"
else:
type_string = "Point"
self.logger.info("processing: {0} ({1})".format(source,
type_string))
# Get de right_ascension and declination (already in radians)
right_ascension = all_values_dict["Ra:" + source][0, 0]
declination = all_values_dict["Dec:" + source][0, 0]
if source_type == 1:
# Get the raw values from the db
maj_raw = all_values_dict["MajorAxis:" + source][0, 0]
min_raw = all_values_dict["MinorAxis:" + source][0, 0]
pa_raw = all_values_dict["Orientation:" + source][0, 0]
# convert to radians (conversion is copy paste JDS)
# major radius (+pad) in rad
maj = (((maj_raw + pad)) / 3600.) * np.pi / 180.
# minor radius (+pad) in rad
minor = (((min_raw + pad)) / 3600.) * np.pi / 180.
pix_asc = pa_raw * np.pi / 180.
# wenss writes always 'GAUSSIAN' even for point sources
# -> set to wenss beam+pad
if maj == 0 or minor == 0:
maj = ((54. + pad) / 3600.) * np.pi / 180.
minor = ((54. + pad) / 3600.) * np.pi / 180.
# set to wenss beam+pad
elif source_type == 0:
maj = (((54. + pad) / 2.) / 3600.) * np.pi / 180.
minor = (((54. + pad) / 2.) / 3600.) * np.pi / 180.
pix_asc = 0.
else:
self.logger.info(
"WARNING: unknown source source_type ({0}),"
"ignoring: ".format(source_type))
continue
# define a small square around the source to look for it
null, null, border_y1, border_x1 = mask.topixel(
[freq, stokes, declination - maj,
right_ascension - maj / np.cos(declination - maj)])
null, null, border_y2, border_x2 = mask.topixel(
[freq, stokes, declination + maj,
right_ascension + maj / np.cos(declination + maj)])
xmin = np.int(np.floor(np.min([border_x1, border_x2])))
xmax = np.int(np.ceil(np.max([border_x1, border_x2])))
ymin = np.int(np.floor(np.min([border_y1, border_y2])))
ymax = np.int(np.ceil(np.max([border_y1, border_y2])))
if xmin > xlen or ymin > ylen or xmax < 0 or ymax < 0:
self.logger.info(
"WARNING: source {0} falls outside the mask,"
" ignoring: ".format(source))
continue
if xmax > xlen or ymax > ylen or xmin < 0 or ymin < 0:
self.logger.info(
"WARNING: source {0} falls across map edge".format(source))
for pixel_x in xrange(xmin, xmax):
for pixel_y in xrange(ymin, ymax):
# skip pixels outside the mask field
if pixel_x >= xlen or pixel_y >= ylen or\
pixel_x < 0 or pixel_y < 0:
continue
# get pixel right_ascension and declination in rad
null, null, pix_dec, pix_ra = mask.toworld(
[0, 0, pixel_y, pixel_x])
# Translate and rotate coords.
translated_pixel_x = (pix_ra - right_ascension) * np.sin(
pix_asc) + (pix_dec - declination) * np.cos(pix_asc)
# to align with ellipse
translate_pixel_y = -(pix_ra - right_ascension) * np.cos(
pix_asc) + (pix_dec - declination) * np.sin(pix_asc)
if (((translated_pixel_x ** 2) / (maj ** 2)) +
((translate_pixel_y ** 2) / (minor ** 2))) < \
mask_patch_size:
mask_data[0, 0, pixel_y, pixel_x] = 1
null = null
mask.putdata(mask_data)
table.close()
def __init__(self,BaseImageName,BeamPix=5,ResidualImName="",DoAlpha=1,
MaskName="",CleanNegComp=False,
NBands=1,
SmoothMode=0,MakeCorrected=1,options=None):
self.DoAlpha=DoAlpha
self.BaseImageName=BaseImageName
self.BeamPix=BeamPix
self.NBands=NBands
self.OutName=options.OutName
self.options=options
self.SmoothMode=SmoothMode
self.MakeCorrected=MakeCorrected
self.header_dict={}
FileDicoModel="%s.DicoModel"%BaseImageName
# ClassModelMachine,DicoModel=GiveModelMachine(FileDicoModel)
# self.ModelMachine=ClassModelMachine(Gain=0.1)
# self.ModelMachine.FromDico(DicoModel)
print("Building model machine", file=log)
ModConstructor = ClassModModelMachine()
self.ModelMachine=ModConstructor.GiveInitialisedMMFromFile(FileDicoModel)
if MaskName!="":
self.ModelMachine.CleanMaskedComponants(MaskName)
if CleanNegComp:
self.ModelMachine.CleanNegComponants(box=10,sig=2)
if ResidualImName=="":
#if "App" in self.ModeNorm:
# FitsFile="%s.app.residual.fits"%BaseImageName
#else:
# FitsFile="%s.int.residual.fits"%BaseImageName
ResidualImName=FitsFile="%s.app.residual.fits"%BaseImageName
else:
ResidualImName=FitsFile=ResidualImName
if self.MakeCorrected:
if self.SmoothMode:
NormImageName="%s.MeanSmoothNorm.fits"%BaseImageName
else:
NormImageName="%s.Norm.fits"%BaseImageName
print("Reading residual image", file=log)
self.FitsFile=FitsFile
im=image(FitsFile)
c=im.coordinates()
self.radec=c.dict()["direction0"]["crval"]
CellSizeRad,_=c.dict()["direction0"]["cdelt"]
self.CellSizeRad=np.abs(CellSizeRad)
self.Cell=(self.CellSizeRad*180/np.pi)*3600
self.CellArcSec=self.Cell
self.ResidualData=im.getdata()
nchan,npol,_,_=self.ResidualData.shape
testImage=np.zeros_like(self.ResidualData)
print("Transposing residual...", file=log)
if ResidualImName!="":
for ch in range(nchan):
for pol in range(npol):
testImage[ch,pol,:,:]=self.ResidualData[ch,pol,:,:].T[::-1,:]#*1.0003900000000001
if self.MakeCorrected:
print("Reading beam...", file=log)
SqrtNormImage=np.zeros_like(self.ResidualData)
imNorm=image(NormImageName).getdata()
print("Transposing beam...", file=log)
for ch in range(nchan):
for pol in range(npol):
SqrtNormImage[ch,pol,:,:]=np.sqrt(imNorm[ch,pol,:,:].T[::-1,:])
else:
SqrtNormImage=np.ones_like(self.ResidualData)
_,_,nx,_=testImage.shape
Nr=10000
indx,indy=np.int64(np.random.rand(Nr)*nx),np.int64(np.random.rand(Nr)*nx)
self.StdResidual=np.std(testImage[0,0,indx,indy])
self.Residual=testImage
self.SqrtNormImage=SqrtNormImage
#!/usr/bin/env python # Convert input CASA image to fits using pyrap. # # Written by Joris van Zwieten, [email protected], September 2010, Version 1.0 # import pyrap.images as im import os.path import sys if len(sys.argv) < 2 or len(sys.argv) > 3: print "usage: img2fits.py <casa image> [output]" sys.exit(1) inf = sys.argv[1] if len(sys.argv) == 3: outf = sys.argv[2] else: outf = os.path.splitext(sys.argv[1])[0] + '.fits' print "converting %s -> %s" % (inf, outf) image = im.image(inf) image.tofits(outf)
img = bdsm.process_image('%s.restored'%workingimage,advanced_opts='True',detection_image='%s.restored'%workingimage,thresh_isl=3,thresh_pix=5,blank_limit=1E-4,adaptive_rms_box='True',adaptive_thresh=200)#,adaptive_rms_box='True',atrous_do='True')
img.export_image(outfile="mask_%s"%workingimage,img_type='island_mask',img_format='casa')
img.export_image(outfile="rms_%s"%workingimage,img_type='rms',img_format='casa')
os.system('image2fits in=%s.restored out=%s.restored.fits'%(workingimage,workingimage))
f = pyfits.open('%s.restored.fits'%workingimage)
noisearray = f[0].data.flatten()
maxpixel = np.max(noisearray)
noisearray = np.random.permutation(noisearray)[:10000]
noisepix = np.array(filter(lambda x: abs(x) > 10E-8,noisearray))
noisepix = np.array(filter(lambda x: abs(x)<infodict['Est Noise']*50.0/1000.0,noisepix))
rms = fit_gaussian_histogram(noisepix,'n')
print 'rms %s, maxpixel %s'%(rms,maxpixel)
f.close()
minthreshold = rms
image = pim.image("rms_%s"%workingimage)
imshape = image.shape()
dataarray = image.getdata(blc=[0,0,0,0], trc=[imshape[0]-1,imshape[1]-1,imshape[2]-1,imshape[3]-1])
dataarray[np.where(np.isnan(dataarray))] = 0
dataarray = dataarray.flatten()
threshold1 = str(np.min([np.max(dataarray)*1E3,prevthreshold]))+'mJy'
dataarray = np.random.permutation(dataarray)[:10000]
dataarray = np.array(filter(lambda x: abs(x) > minthreshold,dataarray))
dataarray = np.random.permutation(dataarray)[:10000]
dataarray.sort()
threshold2 = dataarray[int(len(dataarray)*0.99)]
threshold3 = dataarray[int(len(dataarray)*0.85)]
threshold4 = dataarray[int(len(dataarray)*0.60)]
thresholds = [str(threshold2*1E3)+'mJy',str(threshold3*1E3)+'mJy',str(threshold4*1E3)+'mJy']
threshold2 = thresholds[0]
def main(args):
input_images = glob.glob(args.indir + '/' + args.inpat)
assert (len(input_images) <= 8 and len(input_images) > 0)
beam_params = {} # to store beam params for each image for later use
image_data = {} # store all image data
image_increments = {} # pixel size of each image
decval = {} # declination of each image (should be the same)
max_bmaj = 0.
for inim in input_images:
print bcolors.OKGREEN + 'Opening %s' % (inim) + bcolors.ENDC
im = pim.image(inim)
beam_params[inim] = im.imageinfo()['restoringbeam']
if im.imageinfo()['restoringbeam']['major']['value'] > max_bmaj:
max_bmaj = im.imageinfo()['restoringbeam']['major']['value']
# The next line presumes single-frequency, single-Stokes!
image_data[inim] = im.getdata()[0, 0, :, :]
coords = im.coordinates()
d = coords.get_coordinate('direction')
decval[inim] = d.get_referencevalue()[0]
image_increments[inim] = coords.get_increment()[2][0] * 206265.
print bcolors.OKGREEN + 'Maximum beam size is %f arcsec' % (
max_bmaj) + bcolors.ENDC
big_beam_value = numpy.ceil(max_bmaj) + 1.
print bcolors.OKGREEN + 'Target beam size will be %f arcsec' % (
big_beam_value) + bcolors.ENDC
# In future, possibly try to reject images with particularly large beam values.
# Here, convolve data arrays to big common beam
big_beam = Beam.Beam(big_beam_value, big_beam_value, 0.)
for inim in input_images:
print bcolors.OKGREEN + 'Convolving image data from %s' % (
inim) + bcolors.ENDC
bmaj = beam_params[inim]['major']['value']
bmin = beam_params[inim]['minor']['value']
bpa = beam_params[inim]['positionangle']['value']
req = big_beam.Deconvolve(Beam.Beam(bmin, bmaj, bpa))
print 'Starting beam arcsec (maj,min,pa): %.2f, %.2f, %.2f' % (
bmaj, bmin, bpa)
print 'Convolving beam arcsec (maj,min,pa): %.2f, %.2f, %.2f' % (
req.amaj, req.amin, req.theta)
pix = image_increments[inim]
req_maj_pix = req.amaj / pix
req_min_pix = req.amin / pix
b_pix = Beam.Beam(req_min_pix, req_maj_pix, req.theta)
scale_factor_factor = 1.
print 'Convolving beam pixels (maj,min,pa): %.2f, %.2f, %.2f' % (
b_pix.amaj, b_pix.amin, b_pix.theta)
xr = numpy.ceil(
req.amaj / pix) * 5. # convolving beam defined out to +/- 5 sigma
x, y = numpy.mgrid[-xr:xr + 1, -xr:xr + 1]
r = numpy.array([x, y]).T
g_a = b_pix.norm / scale_factor_factor * numpy.exp(
-0.5 * (r * (b_pix.icov * r[..., None, :]).sum(-1)).sum(-1).T)
image_data[inim] = scipy.signal.fftconvolve(image_data[inim],
g_a,
mode='same')
# Here, obtain noise (proxy) for inverse-variance weighting
print bcolors.OKGREEN + 'Computing noise proxy for each convolved image' + bcolors.ENDC
image_weights = {}
sumweight = 0.
for inim in input_images:
#image_weights[inim]=1.
noise_proxy = numpy.median(
numpy.absolute(image_data[inim] - numpy.median(image_data[inim])))
print 'Noise proxy for %s is %f' % (inim, noise_proxy)
image_weights[inim] = 1. / noise_proxy**2
sumweight += image_weights[inim]
# Now stack
stack_data = numpy.zeros(image_data[input_images[0]].shape)
for inim in input_images:
stack_data += image_weights[inim] * image_data[inim] / sumweight
# Write out to disk
print bcolors.OKGREEN + 'Writing image to %s' % (args.outim) + bcolors.ENDC
im.saveas(args.outim)
im = pim.image(args.outim)
stack_data_out = numpy.expand_dims(numpy.expand_dims(stack_data, axis=0),
axis=0)
im.putdata(stack_data_out)
im = 0
# Update beam size in image info struct
print bcolors.OKGREEN + 'Updating image info (beam size)' + bcolors.ENDC
t = pt.table(args.outim, readonly=False, ack=False)
iminfo = t.getkeyword('imageinfo')
iminfo['restoringbeam']['major']['value'] = big_beam_value
iminfo['restoringbeam']['minor']['value'] = big_beam_value
iminfo['restoringbeam']['positionangle']['value'] = 0.
t.putkeyword('imageinfo', iminfo)
t.close()
def main(images, vertices, outfits, maxwidth=0):
"""
Creates mosaic
Parameters
----------
images : str or list of str
List of filenames of facet images. May be given as a list or as a string
(e.g., '[image1, image2]'
vertices : str or list of str
List of filenames of facet vertices files. May be given as
a list or as a string (e.g., '[vert1, vert2]'
outfits : str
Filename of output FITS mosaic
maxwidth : int, optional
Maximum number of pixels to consider for the width of the mosaic
[default 0 = unlimited] This can be helpful at high declination.
"""
if type(images) is str:
images = images.strip('[]').split(',')
images = [im.strip() for im in images]
if type(vertices) is str:
vertices = vertices.strip('[]').split(',')
vertices = [v.strip() for v in vertices]
formstr = '{0:45s} {1:45s} {2:s} {3:s} {4:s} {5:s}'
print formstr.format("-----","--------","------------","-------","-------","------")
print formstr.format("Image", "FC reg","Norm. weight", "Maj(ac)", "Min(ac)","PA(deg)")
print formstr.format("-----","--------","------------","-------","-------","------")
psf_fwhm = [] # resolution
frequency = [] # frequency of images (should be equal?)
for i in range(len(images)):
this_pim = pim.image(images[i])
info_dict = this_pim.info()['imageinfo']['restoringbeam']
bpar_ma = quanta.quantity(info_dict['major']).get_value('deg')
bpar_mi = quanta.quantity(info_dict['minor']).get_value('deg')
bpar_pa = quanta.quantity(info_dict['positionangle']).get_value('deg')
psf_fwhm.append([bpar_ma, bpar_mi, bpar_pa])
frequency.append(this_pim.info()['coordinates']['spectral2']['restfreq'])
print '{0:45.45s} {1:45.45s} {2:0.2f} {3:0.2f} {4:0.2f} {5:0.2f}'.format(images[i], vertices[i], 0, bpar_ma*60, bpar_mi*60,bpar_pa)
psf_fwhm = np.array(psf_fwhm)
frequency = np.array(frequency)
mean_psf_fwhm = np.mean(psf_fwhm, axis=0)
mean_frequency = np.mean(frequency)
# Initialize some vectors
declims = [] # store the limits of the declination axes
raleft = []
raright = []
rainc = [] # store the r.a. increments in case they differ
decinc = [] # store the dec increments in case they differ
pims = [] # stores the pyrap images of the data
# Get image frames for input images
for im in images:
image = pim.image(im)
sptcoords = image.coordinates().get_coordinate('spectral')
nc = sptcoords.get_axis_size()
# Get Stokes axis. Ensure we are working with the Stokes parameter requested.
stkcoords = image.coordinates().get_coordinate('stokes')
if stkcoords.get_axis_size() == 1:
assert(stkcoords.get_stokes()[0] == 'I')
else:
stks = stkcoords.get_stokes().index('I')
image = image.subimage(blc=(0, stks), trc=(nc-1, stks), dropdegenerate=False)
ns = 1
dircoords = image.coordinates().get_coordinate('direction')
nx = dircoords.get_axis_size(axis=1)
ny = dircoords.get_axis_size(axis=0)
inc = dircoords.get_increment()
ref = dircoords.get_referencepixel()
val = dircoords.get_referencevalue()
# wsclean image header is weird
if val[1]<0:
val[1]+=2*np.pi
ra_axis = (range(nx)-ref[1])*inc[1]+val[1]
dec_axis = (range(ny)-ref[0])*inc[0]+val[0]
rainc.append(inc[1])
decinc.append(inc[0])
declims.append(min(dec_axis))
declims.append(max(dec_axis))
mean_ra = np.mean(ra_axis)
raleft.append((ra_axis[0]-mean_ra)*np.cos(val[0])+mean_ra)
raright.append((ra_axis[-1]-mean_ra)*np.cos(val[0])+mean_ra)
pims.append(image)
# Generate the mosaic coordinate frame
master_dec = np.arange(min(declims),max(declims),min(decinc))
if max(raleft)-min(raright) > 5.*np.pi/3.: # crossed RA=0
for i in range(len(raright)):
raright[i] = raright[i]-2.*np.pi
master_ra = np.arange(max(raleft),min(raright),max(rainc))
lmra = len(master_ra)
if maxwidth != 0:
if lmra > maxwidth:
xboundary = (lmra-maxwidth)/2
master_ra = master_ra[xboundary:-xboundary]
print "Found ra,dec pixel increments (arcsec):"
print np.array(rainc)*206265.,np.array(decinc)*206265.
ma = pims[-1].coordinates()
ma['direction'].set_referencepixel([len(master_dec)/2,len(master_ra)/2])
ma['direction'].set_increment([decinc[np.argmin(np.abs(decinc))],rainc[np.argmin(np.abs(rainc))]])
ma['direction'].set_referencevalue([master_dec[len(master_dec)/2],master_ra[len(master_ra)/2]])
# Initialize the arrays for the output image, sensitivity, and weights
master_im = np.zeros((len(master_dec),len(master_ra)))
master_mask = np.zeros((len(master_dec),len(master_ra)))
# Reproject the images onto the master grid, weight and normalize
for i, im in enumerate(pims):
print 'doing image',i
im, mask = mask_vertices(im, vertices[i])
im = im.regrid([2,3],ma,outshape=(int(nc),int(ns),len(master_dec),len(master_ra)))
mask = mask.regrid([2,3],ma,outshape=(int(nc),int(ns),len(master_dec),len(master_ra)))
master_im += np.squeeze(im.getdata())
master_mask += np.squeeze(mask.getdata())
blank=np.ones_like(im)*np.nan
master_im=np.where(master_mask,master_im,blank)
# Write fits files
arrax = np.zeros( (1,1, len(master_im[:,0]), len(master_im[0,:])) )
arrax[0,0,:,:] = master_im
# Open new casa image for mosaic
new_pim = pim.image('',shape=(1,1, len(master_dec),len(master_ra)), coordsys=ma)
new_pim.putdata(arrax)
# Write fits
new_pim.tofits(outfits, overwrite=True)
# need to add new beam info (not sure if this is possible with pyrap)
hdu = pyfits.open(outfits,mode='update')
header = hdu[0].header
header.update('BMAJ',mean_psf_fwhm[0])
header.update('BMIN',mean_psf_fwhm[1])
header.update('BPA',mean_psf_fwhm[2])
header.update('BUNIT',pims[-1].info()['unit'])
header.update('RESTFRQ',mean_frequency)
header.update('RESTFREQ',mean_frequency)
newhdu = pyfits.PrimaryHDU(data=hdu[0].data, header=header)
newhdu.writeto(outfits,clobber=True)
def _getPixelCoords1Im(coords, imagename):
from interval import interval
import math
try:
from taskinit import ia
ia.open(imagename)
cs = ia.coordsys()
Nx = ia.shape()[0]
Ny = ia.shape()[1]
ia.done()
x0 = cs.referencevalue()['numeric'][0]
y0 = cs.referencevalue()['numeric'][1]
x_pix_ref = cs.referencepixel()['numeric'][0]
y_pix_ref = cs.referencepixel()['numeric'][1]
x_pix_inc = cs.increment()['numeric'][0]
y_pix_inc = cs.increment()['numeric'][1]
# If we fail to load ia, we will use pyrap instead.
# This probably means stacker was loaded from outside casapy.
except ImportError:
from pyrap.images import image
im = image(imagename)
cs = im.coordinates().get_coordinate('direction')
dir_axis_index = im.coordinates().get_axes().index(cs.get_axes())
imshape = im.shape()
try:
x_axis_index = cs.get_axes().index('Right Ascension')
except ValueError:
raise ValueError('Could not find direction coordinate: '\
'RightAscension')
try:
y_axis_index = cs.get_axes().index('Declination')
except ValueError:
raise ValueError('Could not find direction coordinate: '\
'Declination')
Nx = im.shape()[dir_axis_index + x_axis_index]
Ny = im.shape()[dir_axis_index + y_axis_index]
x0 = cs.get_referencevalue()[x_axis_index]
y0 = cs.get_referencevalue()[y_axis_index]
x_pix_ref = cs.get_referencepixel()[x_axis_index]
y_pix_ref = cs.get_referencepixel()[y_axis_index]
x_pix_inc = cs.get_increment()[x_axis_index]
y_pix_inc = cs.get_increment()[y_axis_index]
pixcoords = []
for coord in coords:
dx = (coord.x - x0) * math.cos(coord.y)
dy = math.asin(math.sin(coord.y) / math.cos(dx)) - y0
x = dx / x_pix_inc + x_pix_ref
y = dy / y_pix_inc + y_pix_ref
if x in interval[0, Nx - 1] and y in interval[0., Ny - 1]:
# pixcoords.append(Coord(x,y, coord.weight))
c = Coord(x, y, coord.weight)
try:
c.index = coord.index
except AttributeError:
pass
pixcoords.append(c)
return pixcoords
def on_press(event):
"""
Handle key presses
"""
global fig, all_directions, at, selected_direction
if event.key == 'u':
# Update plot
info = 'Updating display...'
c = at.get_child()
c.set_text(info)
fig.canvas.draw()
update_plot()
if selected_direction is None:
# Print "done" only if there is no selection, as otherwise it will
# overwrite the direction state info text
info += '\n...done'
c = at.get_child()
c.set_text(info)
fig.canvas.draw()
return
elif event.key == 'c':
# Open selfcal images (if any)
selfcal_images = find_selfcal_images(selected_direction)
if len(selfcal_images) > 0:
info = 'Opening selfcal images for {}...'.format(selected_direction.name)
if hasaplpy:
# Update the text box as the call below takes a few seconds
c = at.get_child()
c.set_text(info)
fig.canvas.draw()
make_selfcal_images.main(selfcal_images, interactive=True,
facet_name=selected_direction.name)
else:
if os.path.exists('/tmp/tempimage'):
shutil.rmtree('/tmp/tempimage')
im = pim.image(selfcal_images)
im.view()
else:
info = 'No selfcal images exist for {}'.format(selected_direction.name)
elif event.key == 'i':
# Open full facet image (if any)
facet_image = find_facet_image(selected_direction)
if len(facet_image) > 0:
info = 'Opening facet image for {}...'.format(selected_direction.name)
im2 = pim.image(facet_image[0])
im2.view()
else:
info = 'No image of facet exists for {}'.format(selected_direction.name)
elif event.key == 't':
# Open fast TEC selfcal plots (if any)
selfcal_plots = find_selfcal_tec_plots(selected_direction)
if len(selfcal_plots) > 0:
info = 'Opening selfcal TEC solution plots for {}...'.format(selected_direction.name)
os.system('display -geometry 800x600 {} &'.format(' '.join(selfcal_plots)))
else:
info = 'Final selfcal solutions do not exist for {}'.format(selected_direction.name)
elif event.key == 'g':
# Open slow Gain selfcal plots (if any)
selfcal_plots = find_selfcal_gain_plots(selected_direction)
if len(selfcal_plots) > 0:
info = 'Opening selfcal Gain solution plots for {}...'.format(selected_direction.name)
os.system('display -geometry 800x600 {} &'.format(' '.join(selfcal_plots)))
else:
info = 'Final selfcal solutions do not exist for {}'.format(selected_direction.name)
elif event.key == 'h':
info='Reprinting instructions'
show_instructions()
else:
return
# Update info box
c = at.get_child()
c.set_text(info)
fig.canvas.draw()