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Mosaic.py
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Mosaic.py
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import os
import sys
import shutil
import json
from IPython.display import display, clear_output
from MontagePy.main import *
from MontagePy.archive import *
class Mosaic:
def __init__(self, **kwargs):
verbose = False
dataset = "2MASS J"
size = 0.5
resolution = 1
coordinateSystem = 'Equatorial'
workdir = "work"
backgroundMatching = True
outfile = 'mosaic.fits'
# Arguments
if ('location' in kwargs):
location = kwargs ['location']
else:
raise Exception('Location Required')
if ('verbose' in kwargs):
verbose = kwargs ['verbose']
if ('dataset' in kwargs):
dataset = kwargs['dataset']
if dataset[:4].upper() == 'WISE':
resolution = 6.0
if dataset[:4].upper() == 'SDSS':
resolution = 0.4
if ('resolution' in kwargs):
resolution = kwargs['resolution']
if ('size' in kwargs):
size = kwargs['size']
if ('coordinateSystem' in kwargs):
coordinateSystem = kwargs['coordinateSystem']
if ('workdir' in kwargs):
workdir = kwargs['workdir']
if ('outfile' in kwargs):
outfile = kwargs['outfile']
if ('backgroundMatching' in kwargs):
backgroundMatching = kwargs['backgroundMatching']
home = os.getcwd()
os.chdir(home)
# Clean out any old copy of the work tree, then remake it
# and the set of the subdirectories we will need.
try:
shutil.rmtree(workdir)
except:
pass
os.makedirs(workdir)
os.chdir(workdir)
os.makedirs("raw")
os.makedirs("projected")
os.makedirs("diffs")
os.makedirs("corrected")
# Create the FITS header for the mosaic.
display("Constructing region header specification ...")
if verbose == False:
clear_output(wait=True)
self.status = mHdr(location, size, size, "region.hdr",
resolution=resolution, csys=coordinateSystem)
if self.status['status'] == 1:
display(self.status['msg'])
return
# Retrieve archive images covering the region then scan
# the images for their coverage metadata.
display("Downloading image data ...")
if verbose == False:
clear_output(wait=True)
self.status = mArchiveDownload(dataset, location, size, "raw")
self.status = self.status.replace("'", '"') # Kludge around a bug
self.status = json.loads(self.status) # in MontagePy code
if self.status['status'] == 1:
display(self.status['msg'])
return
display("Collecting metadata for " + str(self.status['count']) + " images ...")
if verbose == False:
clear_output(wait=True)
self.status = mImgtbl("raw", "rimages.tbl")
if self.status['status'] == 1:
display(self.status['msg'])
return
# Reproject the original images to the frame of the
# output FITS header we created
display("Reprojecting images ...")
if verbose == False:
clear_output(wait=True)
self.status = mProjExec("raw", "rimages.tbl", "region.hdr", projdir="projected", quickMode=True)
if self.status['status'] == 1:
display(self.status['msg'])
return
display("Collecting projected image metadata ...")
if verbose == False:
clear_output(wait=True)
mImgtbl("projected", "pimages.tbl")
if self.status['status'] == 1:
display(self.status['msg'])
return
if backgroundMatching:
# Determine the overlaps between images (for background modeling).
display("Determining image overlaps for background modeling ...")
if verbose == False:
clear_output(wait=True)
self.status = mOverlaps("pimages.tbl", "diffs.tbl")
if self.status['status'] == 1:
display(self.status['msg'])
return
# Generate difference images and fit them.
display("Analyzing " + str(self.status['count']) + " image overlaps ...")
if verbose == False:
clear_output(wait=True)
self.status = mDiffFitExec("projected", "diffs.tbl", "region.hdr", "diffs", "fits.tbl")
if self.status['status'] == 1:
display(self.status['msg'])
return
# Model the background corrections.
display("Modeling background corrections ...")
if verbose == False:
clear_output(wait=True)
self.status = mBgModel("pimages.tbl", "fits.tbl", "corrections.tbl")
if self.status['status'] == 1:
display(self.status['msg'])
return
# Background correct the projected images.
display("Applying background corrections ...")
if verbose == False:
clear_output(wait=True)
self.status = mBgExec("projected", "pimages.tbl", "corrections.tbl", "corrected")
if self.status['status'] == 1:
display(self.status['msg'])
return
display("Collecting corrected image metadata ...")
if verbose == False:
clear_output(wait=True)
self.status = mImgtbl("corrected", "cimages.tbl")
if self.status['status'] == 1:
display(self.status['msg'])
return
# Coadd the background-corrected, projected images.
os.chdir(home)
display("Coadding corrected images into final mosaic ...")
if verbose == False:
clear_output(wait=True)
self.status = mAdd(workdir+"/corrected", workdir+"/cimages.tbl", workdir+"/region.hdr", outfile)
if self.status['status'] == 1:
display(self.status['msg'])
return
else:
# Coadd the projected images.
os.chdir(home)
display("Coadding projected images into final mosaic ...")
if verbose == False:
clear_output(wait=True)
self.status = mAdd(workdir+"/projected", workdir+"/pimages.tbl", workdir+"/region.hdr", outfile)
if self.status['status'] == 1:
display(self.status['msg'])
return
display("Final mosaic image: " + outfile)