def buildMaskImage(rootname, bitvalue, extname='DQ', extver=1):
""" Builds mask image from rootname's DQ array
If there is no valid 'DQ' array in image, then return
an empty string.
"""
# If no bitvalue is set, assume no mask is desired
if bitvalue == None:
return None
# build output name
_indx = string.find(rootname, '.fits')
if _indx > 0:
maskname = rootname[:_indx] + '_inmask' + repr(extver) + '.fits'
whtname = rootname[:_indx] + '_wtmask' + repr(extver) + '.fits' #WZ
else:
maskname = rootname + '_inmask' + repr(extver) + '.fits'
whtname = rootname + '_wtmask' + repr(extver) + '.fits' #WZ
# If an old version of the maskfile was present, remove it and rebuild it.
if fileutil.findFile(maskname) == yes:
os.remove(maskname)
if fileutil.findFile(whtname) == yes: #WZ
os.remove(whtname)
# Open input file with DQ array
fdq = pyfits.open(rootname)
try:
# Read in DQ array
dqarr = fdq[extname, extver].data
# Build mask array from DQ array
maskarr = buildMask(dqarr, bitvalue)
#Write out the mask file as simple FITS file
fmask = pyfits.open(maskname, 'append')
maskhdu = pyfits.PrimaryHDU(data=maskarr)
fmask.append(maskhdu)
#Close files
fmask.close()
del fmask
except:
return None
fdq.close()
del fdq
# Return the name of the mask image written out
return maskname
def verifyShiftFile(self):
"""
Verifies that reference file exists.
"""
if self['refimage'] and fu.findFile(self['refimage']):
return True
else: return False
def buildShadowMaskImage(rootname, detnum, replace=no):
""" Builds mask image from WFPC2 shadow calibrations.
detnum - string value for 'DETECTOR' detector
"""
# insure detnum is a string
if not isinstance(detnum, types.StringType):
detnum = repr(detnum)
_funcroot = '_func_Shadow_WF'
# build template shadow mask's filename
_mask = 'wfpc2_inmask' + detnum + '.fits'
if rootname != None:
# build output name by stripping off old extension from rootname...
_name = drutil.buildNewRootname(rootname)
#print 'found rootname of ',_name
# ... now add our own syntax and extension to the output name.
_indx = string.find(_name, '.')
if _indx > 0:
maskname = _name[:_indx] + '_inmask' + detnum + '.fits'
else:
maskname = _name + '_inmask' + detnum + '.fits'
else:
maskname = None
# Check to see if file exists...
if fileutil.findFile(_mask) == no or replace:
# If not, create the file.
# This takes a long time to run, so it should be done
# only when absolutely necessary...
try:
_funcx = _funcroot + detnum + 'x'
_funcy = _funcroot + detnum + 'y'
_xarr = clip(fromfunction(eval(_funcx), (800, 800)), 0.0,
1.0).astype(int16)
_yarr = clip(fromfunction(eval(_funcy), (800, 800)), 0.0,
1.0).astype(int16)
maskarr = _xarr * _yarr
#Write out the mask file as simple FITS file
fmask = pyfits.open(_mask, 'append')
maskhdu = pyfits.PrimaryHDU(data=maskarr)
fmask.append(maskhdu)
#Close files
fmask.close()
del fmask
except:
return None
# Now, copy template mask file to output file, if necessary
if maskname != None:
fileutil.copyFile(_mask, maskname, replace=no)
# Return the name of the mask image written out
return maskname
def __init__(self, inlist=None, output=None, shiftfile=None):
"""
Parameters
===========
`inlist`: a list
a python list of filenames
`output` a string
a user specified output name or 'final'
`shiftfile`: a string
a name of a shift file, if given, the association table will be
updated with the values in the shift file
"""
if output == None:
if len(inlist) == 1:
self.output = fu.buildNewRootname(inlist[0])
else:
self.output = 'final'
else:
self.output = fu.buildNewRootname(output)
# Ensure that output name does not already contain '_drz'
_indx = self.output.find('_drz')
if _indx > 0:
self.output = self.output[:_indx]
self.order = []
if inlist != None:
for fn in inlist:
if fu.findFile(fu.buildRootname(fn)):
self.order.append(fu.buildNewRootname(fn))
else:
# This may mean corrupted asn table in which a file is listed as present
# when it is missing.
raise IOError, 'File %s not found.\n' %fn
dict.__init__(self, output=self.output, order=[], members={})
if inlist != None:
self.input = [fu.buildRootname(f) for f in inlist]
self.shiftfile = shiftfile