def process(self, input):
catalog_format = self.catalog_format
kernel_fwhm = self.kernel_fwhm
snr_threshold = self.snr_threshold
model = ModelContainer(input)
for image_model in model:
catalog = make_tweakreg_catalog(image_model, kernel_fwhm,
snr_threshold)
filename = image_model.meta.filename
self.log.info('Detected {0} sources in {1}.'.
format(len(catalog), filename))
catalog_filename = filename.replace('.fits', '_cat.{0}'.
format(catalog_format))
if catalog_format == 'ecsv':
fmt = 'ascii.ecsv'
elif catalog_format == 'fits':
# NOTE: The catalog must not contain any 'None' values.
# FITS will also not clobber existing files.
fmt = 'fits'
else:
raise ValueError('catalog_format must be "ecsv" or "fits".')
catalog.write(catalog_filename, format=fmt)
self.log.info('Wrote source catalog: {0}'.
format(catalog_filename))
image_model.meta.tweakreg_catalog.filename = catalog_filename
image_model.catalog = catalog
model.close()
return model
def test_container_structure():
"""Test for container usage."""
# Setup input
inputs = [MultiSlitModel(f) for f in helpers.INPUT_FILES]
container = ModelContainer(inputs)
# Make the source-based containers
outputs = multislit_to_container(container)
# See what we got.
assert len(container) == 3
assert len(outputs) == 5
for i, model in enumerate(container):
for slit in model.slits:
exposure = outputs[str(slit.source_id)][i]
assert (exposure.data == slit.data).all()
assert np.array_equal(exposure.data, slit.data)
assert exposure.meta.filename == model.meta.filename
assert exposure.meta.wcs.pipeline == slit.meta.wcs.pipeline
# Closeout
container.close()
for model in inputs:
model.close()
def test_resample_variance(nircam_rate, n_images):
"""Test that resampled variance and error arrays are computed properly"""
err = 0.02429
var_rnoise = 0.00034
var_poisson = 0.00025
im = AssignWcsStep.call(nircam_rate)
im.var_rnoise += var_rnoise
im.var_poisson += var_poisson
im.err += err
im.meta.filename = "foo.fits"
c = ModelContainer()
for n in range(n_images):
c.append(im.copy())
result = ResampleStep.call(c, blendheaders=False)
# Verify that the combined uncertainty goes as 1 / sqrt(N)
assert_allclose(result.err[5:-5, 5:-5].mean(),
err / np.sqrt(n_images),
atol=1e-5)
assert_allclose(result.var_rnoise[5:-5, 5:-5].mean(),
var_rnoise / n_images,
atol=1e-7)
assert_allclose(result.var_poisson[5:-5, 5:-5].mean(),
var_poisson / n_images,
atol=1e-7)
def process(self, *args):
container = ModelContainer()
model1 = ImageModel(args[0]).copy()
model2 = ImageModel(args[0]).copy()
model1.meta.filename = 'swc_model1.fits'
model2.meta.filename = 'swc_model2.fits'
container.append(model1)
container.append(model2)
return container
def test_weight_type(nircam_rate, _jail):
"""Check that weight_type of exptime and ivm work"""
im1 = AssignWcsStep.call(nircam_rate, sip_approx=False)
im1.var_rnoise[:] = 0
im2 = im1.copy()
im3 = im1.copy()
im1.data += 10
im2.data += 5
im3.data += 5
im1.var_rnoise += (1 / 10)
im2.var_rnoise += (1 / 5)
im3.var_rnoise += (1 / 5)
im2.meta.observation.sequence_id = "2"
im3.meta.observation.sequence_id = "3"
c = ModelContainer([im1, im2, im3])
assert len(c.group_names) == 3
result1 = ResampleStep.call(c, weight_type="ivm", blendheaders=False, save_results=True)
# assert_allclose(result1.data, result2.data)
# assert_allclose(result1.wht, result2.wht)
assert_allclose(result1.data[100:105, 100:105], 7.5, rtol=1e-2)
assert_allclose(result1.wht[100:105, 100:105], 20, rtol=1e-2)
result2 = ResampleStep.call(c, weight_type="exptime", blendheaders=False)
assert_allclose(result2.data[100:105, 100:105], 7.5, rtol=1e-2)
assert_allclose(result2.wht[100:105, 100:105], 20, rtol=1e-2)
def create_models(infiles=INFILES, plot=True):
allmodels = []
allmodels_wcs = []
if plot is True:
fig = plt.figure(figsize=(12,10))
infiles.sort()
for i,item in enumerate(infiles):
if plot is True:
# Plot dithered images
data = fits.getdata(item)
ax = fig.add_subplot(2,2,i+1)
ax.set_adjustable('box-forced')
#pos = re.search("pos\d", item)
ax.set_title(os.path.basename(item))
ax.imshow(data, origin="lower", vmin=-0.5, vmax=0.5)
# Add WCS to the files
model = image.ImageModel(item)
allmodels.append(model)
awcs = assign_wcs.AssignWcsStep()
model_wcs = awcs(model)
allmodels_wcs.append(model_wcs)
if plot is True:
figname = OUTROOT+"_dithered.png"
plt.savefig(figname)
model_container = ModelContainer(allmodels_wcs)
model_container.meta.filename = RESAMPLED_MOSAIC
return model_container
def test_default_input_with_container(mk_tmp_dirs):
"""Test default input name from a ModelContainer"""
model_path = t_path('data/flat.fits')
with ModelContainer([model_path]) as container:
step = StepWithModel()
step.run(container)
assert step._input_filename is None
def test_resample_undefined_variance(nircam_rate, shape):
"""Test that resampled variance and error arrays are computed properly"""
im = AssignWcsStep.call(nircam_rate)
im.var_rnoise = np.ones(shape, dtype=im.var_rnoise.dtype.type)
im.var_poisson = np.ones(shape, dtype=im.var_poisson.dtype.type)
im.var_flat = np.ones(shape, dtype=im.var_flat.dtype.type)
im.meta.filename = "foo.fits"
c = ModelContainer([im])
ResampleStep.call(c, blendheaders=False)
def to_container(self):
"""Convert to a ModelContainer of ImageModels for each plane"""
from jwst.datamodels import ImageModel, ModelContainer
container = ModelContainer()
for plane in range(self.shape[0]):
image = ImageModel()
for attribute in [
'data', 'dq', 'err', 'zeroframe', 'area', 'var_poisson',
'var_rnoise', 'var_flat'
]:
try:
setattr(image, attribute,
self.getarray_noinit(attribute)[plane])
except AttributeError:
pass
image.update(self)
try:
image.meta.wcs = self.meta.wcs
except AttributeError:
pass
container.append(image)
return container
def container():
warnings.simplefilter("ignore")
asn_file_path, asn_file_name = op.split(ASN_FILE)
with pushdir(asn_file_path):
with ModelContainer(asn_file_name) as c:
for m in c:
m.meta.observation.program_number = '0001'
m.meta.observation.observation_number = '1'
m.meta.observation.visit_number = '1'
m.meta.observation.visit_group = '1'
m.meta.observation.sequence_id = '01'
m.meta.observation.activity_id = '1'
m.meta.observation.exposure_number = '1'
m.meta.instrument.name = 'NIRCAM'
m.meta.instrument.channel = 'SHORT'
yield c
def test_build_interpolated_output_wcs(miri_rate_pair):
im1, im2 = miri_rate_pair
driz = ResampleSpecData(ModelContainer([im1, im2]))
output_wcs = driz.build_interpolated_output_wcs()
# Make sure that all RA, Dec values in the input image have a location in
# the output frame
grid = grid_from_bounding_box(im2.meta.wcs.bounding_box)
ra, dec, lam = im2.meta.wcs(*grid)
x, y = output_wcs.invert(ra, dec, lam)
# This currently fails, as we see a slight offset
# assert (x > 0).all()
# Make sure the output slit size is larger than the input slit size
# for this nodded data
assert driz.data_size[1] > ra.shape[1]
def xxx(header):
"""
"""
ra, dec = 53.18118642, -27.79096316
hdu = utils.make_wcsheader(ra=ra,
dec=dec,
size=10,
pixscale=0.06,
get_hdu=True)
out = grizli.jwst.hdu_to_imagemodel(hdu)
from jwst.datamodels import ModelContainer, DrizProductModel
product = DrizProductModel(out.data.shape)
product.meta.wcs = out.meta.wcs
from jwst.resample import gwcs_blot, gwcs_drizzle
driz = gwcs_drizzle.GWCSDrizzle(product) #, outwcs=out.meta.wcs)
driz.add_image(blot_data,
wcs_model.meta.wcs,
xmax=out.data.shape[1],
ymax=out.data.shape[0])
from jwst.resample import resample_utils
from drizzle import util
input_wcs = wcs_model.meta.wcs
output_wcs = out.meta.wcs
fillval = 'INDEF'
insci = blot_data
inwht = None
xmin = xmax = ymin = ymax = 0
uniqid = 1
outsci = driz.outsci * 1
outwht = driz.outwht * 1
outcon = driz.outcon * 1
in_units = 'cps'
from jwst.resample import resample
groups = ModelContainer([wcs_model])
sampler = resample.ResampleData(groups, output=driz)
def data_model_list():
pytest.importorskip("jwst")
from jwst.datamodels import DataModel, ModelContainer
models = []
for k in range(6):
m = DataModel()
m.meta.observation.program_number = '0001'
m.meta.observation.observation_number = '1'
m.meta.observation.visit_number = '1'
m.meta.observation.visit_group = '1'
m.meta.observation.sequence_id = '01'
m.meta.observation.activity_id = '1'
m.meta.observation.exposure_number = '1'
m.meta.instrument.name = 'NIRCAM'
m.meta.instrument.channel = 'SHORT'
m.meta.filename = 'file{:d}.fits'.format(k)
models.append(m)
models[-3].meta.observation.observation_number = '2'
models[-2].meta.observation.observation_number = '3'
models[-1].meta.observation.observation_number = '3'
return ModelContainer(models)
def test_multichip_alignment_step(monkeypatch):
monkeypatch.setattr(tweakreg_step, 'align_wcs', _align_wcs)
monkeypatch.setattr(tweakreg_step, 'make_tweakreg_catalog',
_make_tweakreg_catalog)
# image 1
w1 = _make_gwcs_wcs('data/wfc3_uvis1.hdr')
m1 = ImageModel(np.zeros((100, 100)))
m1.meta.filename = 'ext1'
m1.meta.observation.observation_number = '1'
m1.meta.observation.program_number = '1'
m1.meta.observation.visit_number = '1'
m1.meta.observation.visit_group = '1'
m1.meta.observation.sequence_id = '1'
m1.meta.observation.activity_id = '1'
m1.meta.observation.exposure_number = '1'
m1.meta.wcsinfo.v2_ref = 0
m1.meta.wcsinfo.v3_ref = 0
m1.meta.wcsinfo.roll_ref = 0
m1.meta.wcs = w1
imcat1 = table.Table.read(get_pkg_data_filename('data/wfc3_uvis1.cat'),
format='ascii.csv',
delimiter=' ',
names=['x', 'y'])
imcat1['x'] += 1
imcat1['y'] += 1
m1.tweakreg_catalog = imcat1
# image 2
w2 = _make_gwcs_wcs('data/wfc3_uvis2.hdr')
m2 = ImageModel(np.zeros((100, 100)))
m2.meta.filename = 'ext4'
m2.meta.observation.observation_number = '1'
m2.meta.observation.program_number = '1'
m2.meta.observation.visit_number = '1'
m2.meta.observation.visit_group = '1'
m2.meta.observation.sequence_id = '1'
m2.meta.observation.activity_id = '1'
m2.meta.observation.exposure_number = '1'
m2.meta.wcsinfo.v2_ref = 0
m2.meta.wcsinfo.v3_ref = 0
m2.meta.wcsinfo.roll_ref = 0
m2.meta.wcs = w2
imcat2 = table.Table.read(get_pkg_data_filename('data/wfc3_uvis2.cat'),
format='ascii.csv',
delimiter=' ',
names=['x', 'y'])
imcat2['x'] += 1
imcat2['y'] += 1
m2.tweakreg_catalog = imcat2
# refcat
wr = _make_reference_gwcs_wcs('data/wfc3_uvis1.hdr')
mr = ImageModel(np.zeros((100, 100)))
mr.meta.filename = 'refcat'
mr.meta.observation.observation_number = '0'
mr.meta.observation.program_number = '0'
mr.meta.observation.visit_number = '0'
mr.meta.observation.visit_group = '0'
mr.meta.observation.sequence_id = '0'
mr.meta.observation.activity_id = '0'
mr.meta.observation.exposure_number = '0'
mr.meta.wcsinfo.v2_ref = 0
mr.meta.wcsinfo.v3_ref = 0
mr.meta.wcsinfo.roll_ref = 0
mr.meta.wcs = wr
refcat = table.Table.read(get_pkg_data_filename('data/ref.cat'),
format='ascii.csv',
delimiter=' ',
names=['RA', 'DEC'])
x, y = wr.world_to_pixel(refcat['RA'], refcat['DEC'])
refcat['x'] = x
refcat['y'] = y
mr.tweakreg_catalog = refcat
# update bounding box of the reference WCS to include all test sources:
mr.meta.wcs.bounding_box = ((x.min() - 0.5, x.max() + 0.5),
(y.min() - 0.5, y.max() + 0.5))
mc = ModelContainer([mr, m1, m2])
mc.models_grouped
step = tweakreg_step.TweakRegStep()
step.fitgeometry = 'general'
step.nclip = 0
# Increase matching tolerance to pass 'fit_quality_is_good' test.
# This test would detect large corrections and therefore
# would flag the quality of the fit as "bad" and therefore, it will not
# apply computed corrections ('fit_quality_is_good' test was designed by
# Warren for evaluating "quality of fit" for HAP).
step.tolerance = 2
# Alternatively, disable this 'fit_quality_is_good' test:
# step.fit_quality_is_good = lambda x, y: True
mr, m1, m2 = step.process(mc)
wc1 = m1.meta.wcs
wc2 = m2.meta.wcs
ra1, dec1 = wc1(imcat1['x'], imcat1['y'])
ra2, dec2 = wc2(imcat2['x'], imcat2['y'])
ra = np.concatenate([ra1, ra2])
dec = np.concatenate([dec1, dec2])
rra = refcat['RA']
rdec = refcat['DEC']
rmse_ra = np.sqrt(np.mean((ra - rra)**2))
rmse_dec = np.sqrt(np.mean((dec - rdec)**2))
assert rmse_ra < _REF_RMSE_RA
assert rmse_dec < _REF_RMSE_DEC
def run_multislit_to_container():
inputs = ModelContainer([MultiSlitModel(f) for f in helpers.INPUT_FILES])
outputs = multislit_to_container(inputs)
return inputs, outputs