def _resample_to_new_frame(self, adinputs=None, frame=None, order=3,
conserve=True, output_shape=None, origin=None,
clean_data=False, process_objcat=False):
"""
This private method resamples a number of AstroData objects to a
CoordinateFrame they share. It is basically just a wrapper for the
transform.resample_from_wcs() method that creates an
appropriately-sized output based on the complete set of input
AstroData objects.
Parameters
----------
frame: str
name of CoordinateFrame to be resampled to
order: int (0-5)
order of interpolation (0=nearest, 1=linear, etc.)
output_shape : tuple/None
shape of output image (if None, calculate and use shape that
contains all resampled inputs)
origin: tuple/None
location of origin in reampled output (i.e., data to the left of
or below this will be cut)
clean_data : bool
replace bad pixels with a ring median of their values to avoid
ringing if using a high-order interpolation?
process_objcat : bool
update (rather than delete) the OBJCAT?
"""
log = self.log
if clean_data:
self.applyDQPlane(adinputs, replace_flags=DQ.not_signal ^ DQ.no_data,
replace_value="median", inner=3, outer=5)
if output_shape is None or origin is None:
all_corners = np.concatenate([transform.get_output_corners(
ext.wcs.get_transform(ext.wcs.input_frame, frame),
input_shape=ext.shape) for ad in adinputs for ext in ad], axis=1)
if origin is None:
origin = tuple(np.ceil(min(corners)) for corners in all_corners)
if output_shape is None:
output_shape = tuple(int(np.floor(max(corners)) - np.ceil(min(corners)) + 1)
for corners in all_corners)
log.stdinfo("Output image will have shape "+repr(output_shape[::-1]))
adoutputs = []
for ad in adinputs:
log.stdinfo(f"Resampling {ad.filename}")
ad_out = transform.resample_from_wcs(ad, frame, order=order, conserve=conserve,
output_shape=output_shape, origin=origin,
process_objcat=process_objcat)
adoutputs.append(ad_out)
return adoutputs
def _resample_to_new_frame(self, adinputs=None, frame=None, order=3,
trim_data=False, clean_data=False,
process_objcat=False):
"""
This private method resamples a number of AstroData objects to a
CoordinateFrame they share. It is basically just a wrapper for the
transform.resample_from_wcs() method that creates an
appropriately-sized output based on the complete set of input
AstroData objects.
Parameters
----------
frame: str
name of CoordinateFrame to be resampled to
order: int (0-5)
order of interpolation (0=nearest, 1=linear, etc.)
trim_data: bool
trim image to size of reference image?
clean_data: bool
replace bad pixels with a ring median of their values to avoid
ringing if using a high-order interpolation?
process_objcat: bool
update (rather than delete) the OBJCAT?
"""
log = self.log
if clean_data:
self.applyDQPlane(adinputs, replace_flags=DQ.not_signal ^ DQ.no_data,
replace_value="median", inner=3, outer=5)
if trim_data:
output_shape = adinputs[0][0].shape
origin = (0,) * len(output_shape)
else:
all_corners = np.concatenate([transform.get_output_corners(
ad[0].wcs.get_transform(ad[0].wcs.input_frame, frame),
input_shape=ad[0].shape) for ad in adinputs], axis=1)
origin = tuple(np.ceil(min(corners)) for corners in all_corners)
output_shape = tuple(int(np.floor(max(corners)) - np.ceil(min(corners)) + 1)
for corners in all_corners)
print("ORIGIN", origin)
log.stdinfo("Output image will have shape "+repr(output_shape[::-1]))
adoutputs = []
for ad in adinputs:
log.stdinfo(f"Resampling {ad.filename}")
ad_out = transform.resample_from_wcs(ad, frame, order=order,
output_shape=output_shape, origin=origin,
process_objcat=process_objcat)
adoutputs.append(ad_out)
return adoutputs
def _split_mosaic_into_extensions(ref_ad, mos_ad, border_size=0):
"""
Split the `mos_ad` mosaicked data into multiple extensions using
coordinate frames and transformations stored in the `ref_ad` object.
Right now, the pixels at the border of each extensions might not
match the expected values. The mosaicking and de-mosaicking is an
interpolation, because there's a small rotation. This will only interpolate,
not extrapolate beyond the boundaries of the input data, so you lose some
information at the edges when you perform both operations and consequently
the edges of the input frame get lost.
Parameters
----------
ref_ad : AstroData
Reference multi-extension-file object containing a gWCS.
mos_ad : AstroData
Mosaicked data that will be split containing a single extension.
border_size : int
Number of pixels to be trimmed out from each border.
Returns
-------
AstroData : Split multi-extension-file object.
See Also
--------
- :func:`gempy.library.transform.add_mosaic_wcs`
- :func:`gempy.library.transform.resample_from_wcs`
"""
# Check input data
if len(mos_ad) > 1:
raise ValueError("Expected number of extensions of `mos_ad` to be 1. "
"Found {:d}".format(len(mos_ad)))
if len(mos_ad[0].shape) != 2:
raise ValueError("Expected ndim for `mos_ad` to be 2. "
"Found {:d}".format(len(mos_ad[0].shape)))
# Get original relative shift
origin_shift_y, origin_shift_x = mos_ad[0].nddata.meta['transform'][
'origin']
# Create shift transformation
shift_x = models.Shift(origin_shift_x - border_size)
shift_y = models.Shift(origin_shift_y - border_size)
# Create empty AD
ad_out = astrodata.create(ref_ad.phu)
# Update data_section to be able to resample WCS frames
datasec_kw = mos_ad._keyword_for('data_section')
mos_ad[0].hdr[datasec_kw] = '[1:{},1:{}]'.format(*mos_ad[0].shape[::-1])
# Loop across all extensions
for i, ref_ext in enumerate(ref_ad):
# Create new transformation pipeline
in_frame = ref_ext.wcs.input_frame
mos_frame = coordinate_frames.Frame2D(name="mosaic")
mosaic_to_pixel = ref_ext.wcs.get_transform(mos_frame, in_frame)
pipeline = [(mos_frame, mosaic_to_pixel), (in_frame, None)]
mos_ad[0].wcs = gWCS(pipeline)
# Shift mosaic in order to set reference (0, 0) on Detector 2
mos_ad[0].wcs.insert_transform(mos_frame,
shift_x & shift_y,
after=True)
# Apply transformation
temp_ad = transform.resample_from_wcs(mos_ad,
in_frame.name,
origin=(0, 0),
output_shape=ref_ext.shape)
# Update data_section
datasec_kw = ref_ad._keyword_for('data_section')
temp_ad[0].hdr[datasec_kw] = \
'[1:{:d},1:{:d}]'.format(*temp_ad[0].shape[::-1])
# If detector_section returned something, set an appropriate value
det_sec_kw = ref_ext._keyword_for('detector_section')
det_sec = ref_ext.detector_section()
if det_sec:
temp_ad[0].hdr[det_sec_kw] = \
'[{}:{},{}:{}]'.format(
det_sec.x1 + 1, det_sec.x2, det_sec.y1 + 1, det_sec.y2)
else:
del temp_ad[0].hdr[det_sec_kw]
# If array_section returned something, set an appropriate value
arr_sec_kw = ref_ext._keyword_for('array_section')
arr_sec = ref_ext.array_section()
if arr_sec:
temp_ad[0].hdr[arr_sec_kw] = \
'[{}:{},{}:{}]'.format(
arr_sec.x1 + 1, arr_sec.x2, arr_sec.y1 + 1, arr_sec.y2)
else:
del temp_ad[0].hdr[arr_sec_kw]
ad_out.append(temp_ad[0])
return ad_out
def makeSlitIllum(self, adinputs=None, **params):
"""
Makes the processed Slit Illumination Function by binning a 2D
spectrum along the dispersion direction, fitting a smooth function
for each bin, fitting a smooth 2D model, and reconstructing the 2D
array using this last model.
Its implementation based on the IRAF's `noao.twodspec.longslit.illumination`
task following the algorithm described in [Valdes, 1968].
It expects an input calibration image to be an a dispersed image of the
slit without illumination problems (e.g, twilight flat). The spectra is
not required to be smooth in wavelength and may contain strong emission
and absorption lines. The image should contain a `.mask` attribute in
each extension, and it is expected to be overscan and bias corrected.
Parameters
----------
adinputs : list
List of AstroData objects containing the dispersed image of the
slit of a source free of illumination problems. The data needs to
have been overscan and bias corrected and is expected to have a
Data Quality mask.
bins : {None, int}, optional
Total number of bins across the dispersion axis. If None,
the number of bins will match the number of extensions on each
input AstroData object. It it is an int, it will create N bins
with the same size.
border : int, optional
Border size that is added on every edge of the slit illumination
image before cutting it down to the input AstroData frame.
smooth_order : int, optional
Order of the spline that is used in each bin fitting to smooth
the data (Default: 3)
x_order : int, optional
Order of the x-component in the Chebyshev2D model used to
reconstruct the 2D data from the binned data.
y_order : int, optional
Order of the y-component in the Chebyshev2D model used to
reconstruct the 2D data from the binned data.
Return
------
List of AstroData : containing an AstroData with the Slit Illumination
Response Function for each of the input object.
References
----------
.. [Valdes, 1968] Francisco Valdes "Reduction Of Long Slit Spectra With
IRAF", Proc. SPIE 0627, Instrumentation in Astronomy VI,
(13 October 1986); https://doi.org/10.1117/12.968155
"""
log = self.log
log.debug(gt.log_message("primitive", self.myself(), "starting"))
timestamp_key = self.timestamp_keys[self.myself()]
suffix = params["suffix"]
bins = params["bins"]
border = params["border"]
debug_plot = params["debug_plot"]
smooth_order = params["smooth_order"]
cheb2d_x_order = params["x_order"]
cheb2d_y_order = params["y_order"]
ad_outputs = []
for ad in adinputs:
if len(ad) > 1 and "mosaic" not in ad[0].wcs.available_frames:
log.info('Add "mosaic" gWCS frame to input data')
geotable = import_module('.geometry_conf', self.inst_lookups)
# deepcopy prevents modifying input `ad` inplace
ad = transform.add_mosaic_wcs(deepcopy(ad), geotable)
log.info("Temporarily mosaicking multi-extension file")
mosaicked_ad = transform.resample_from_wcs(
ad,
"mosaic",
attributes=None,
order=1,
process_objcat=False)
else:
log.info('Input data already has one extension and has a '
'"mosaic" frame.')
# deepcopy prevents modifying input `ad` inplace
mosaicked_ad = deepcopy(ad)
log.info("Transposing data if needed")
dispaxis = 2 - mosaicked_ad[0].dispersion_axis() # python sense
should_transpose = dispaxis == 1
data, mask, variance = _transpose_if_needed(
mosaicked_ad[0].data,
mosaicked_ad[0].mask,
mosaicked_ad[0].variance,
transpose=should_transpose)
log.info("Masking data")
data = np.ma.masked_array(data, mask=mask)
variance = np.ma.masked_array(variance, mask=mask)
std = np.sqrt(variance) # Easier to work with
log.info("Creating bins for data and variance")
height = data.shape[0]
width = data.shape[1]
if bins is None:
nbins = max(len(ad), 12)
bin_limits = np.linspace(0, height, nbins + 1, dtype=int)
elif isinstance(bins, int):
nbins = bins
bin_limits = np.linspace(0, height, nbins + 1, dtype=int)
else:
# ToDo: Handle input bins as array
raise TypeError("Expected None or Int for `bins`. "
"Found: {}".format(type(bins)))
bin_top = bin_limits[1:]
bin_bot = bin_limits[:-1]
binned_data = np.zeros_like(data)
binned_std = np.zeros_like(std)
log.info("Smooth binned data and variance, and normalize them by "
"smoothed central value")
for bin_idx, (b0, b1) in enumerate(zip(bin_bot, bin_top)):
rows = np.arange(width)
avg_data = np.ma.mean(data[b0:b1], axis=0)
model_1d_data = astromodels.UnivariateSplineWithOutlierRemoval(
rows, avg_data, order=smooth_order)
avg_std = np.ma.mean(std[b0:b1], axis=0)
model_1d_std = astromodels.UnivariateSplineWithOutlierRemoval(
rows, avg_std, order=smooth_order)
slit_central_value = model_1d_data(rows)[width // 2]
binned_data[b0:b1] = model_1d_data(rows) / slit_central_value
binned_std[b0:b1] = model_1d_std(rows) / slit_central_value
log.info("Reconstruct 2D mosaicked data")
bin_center = np.array(0.5 * (bin_bot + bin_top), dtype=int)
cols_fit, rows_fit = np.meshgrid(np.arange(width), bin_center)
fitter = fitting.SLSQPLSQFitter()
model_2d_init = models.Chebyshev2D(x_degree=cheb2d_x_order,
x_domain=(0, width),
y_degree=cheb2d_y_order,
y_domain=(0, height))
model_2d_data = fitter(model_2d_init, cols_fit, rows_fit,
binned_data[rows_fit, cols_fit])
model_2d_std = fitter(model_2d_init, cols_fit, rows_fit,
binned_std[rows_fit, cols_fit])
rows_val, cols_val = \
np.mgrid[-border:height+border, -border:width+border]
slit_response_data = model_2d_data(cols_val, rows_val)
slit_response_mask = np.pad(
mask, border, mode='edge') # ToDo: any update to the mask?
slit_response_std = model_2d_std(cols_val, rows_val)
slit_response_var = slit_response_std**2
del cols_fit, cols_val, rows_fit, rows_val
_data, _mask, _variance = _transpose_if_needed(
slit_response_data,
slit_response_mask,
slit_response_var,
transpose=dispaxis == 1)
log.info("Update slit response data and data_section")
slit_response_ad = deepcopy(mosaicked_ad)
slit_response_ad[0].data = _data
slit_response_ad[0].mask = _mask
slit_response_ad[0].variance = _variance
if "mosaic" in ad[0].wcs.available_frames:
log.info(
"Map coordinates between slit function and mosaicked data"
) # ToDo: Improve message?
slit_response_ad = _split_mosaic_into_extensions(
ad, slit_response_ad, border_size=border)
elif len(ad) == 1:
log.info("Trim out borders")
slit_response_ad[0].data = \
slit_response_ad[0].data[border:-border, border:-border]
slit_response_ad[0].mask = \
slit_response_ad[0].mask[border:-border, border:-border]
slit_response_ad[0].variance = \
slit_response_ad[0].variance[border:-border, border:-border]
log.info("Update metadata and filename")
gt.mark_history(slit_response_ad,
primname=self.myself(),
keyword=timestamp_key)
slit_response_ad.update_filename(suffix=suffix, strip=True)
ad_outputs.append(slit_response_ad)
# Plotting ------
if debug_plot:
log.info("Creating plots")
palette = copy(plt.cm.cividis)
palette.set_bad('r', 0.75)
norm = vis.ImageNormalize(data[~data.mask],
stretch=vis.LinearStretch(),
interval=vis.PercentileInterval(97))
fig = plt.figure(num="Slit Response from MEF - {}".format(
ad.filename),
figsize=(12, 9),
dpi=110)
gs = gridspec.GridSpec(nrows=2, ncols=3, figure=fig)
# Display raw mosaicked data and its bins ---
ax1 = fig.add_subplot(gs[0, 0])
im1 = ax1.imshow(data,
cmap=palette,
origin='lower',
vmin=norm.vmin,
vmax=norm.vmax)
ax1.set_title("Mosaicked Data\n and Spectral Bins",
fontsize=10)
ax1.set_xlim(-1, data.shape[1])
ax1.set_xticks([])
ax1.set_ylim(-1, data.shape[0])
ax1.set_yticks(bin_center)
ax1.tick_params(axis=u'both', which=u'both', length=0)
ax1.set_yticklabels(
["Bin {}".format(i) for i in range(len(bin_center))],
fontsize=6)
_ = [ax1.spines[s].set_visible(False) for s in ax1.spines]
_ = [ax1.axhline(b, c='w', lw=0.5) for b in bin_limits]
divider = make_axes_locatable(ax1)
cax1 = divider.append_axes("right", size="5%", pad=0.05)
plt.colorbar(im1, cax=cax1)
# Display non-smoothed bins ---
ax2 = fig.add_subplot(gs[0, 1])
im2 = ax2.imshow(binned_data, cmap=palette, origin='lower')
ax2.set_title("Binned, smoothed\n and normalized data ",
fontsize=10)
ax2.set_xlim(0, data.shape[1])
ax2.set_xticks([])
ax2.set_ylim(0, data.shape[0])
ax2.set_yticks(bin_center)
ax2.tick_params(axis=u'both', which=u'both', length=0)
ax2.set_yticklabels(
["Bin {}".format(i) for i in range(len(bin_center))],
fontsize=6)
_ = [ax2.spines[s].set_visible(False) for s in ax2.spines]
_ = [ax2.axhline(b, c='w', lw=0.5) for b in bin_limits]
divider = make_axes_locatable(ax2)
cax2 = divider.append_axes("right", size="5%", pad=0.05)
plt.colorbar(im2, cax=cax2)
# Display reconstructed slit response ---
vmin = slit_response_data.min()
vmax = slit_response_data.max()
ax3 = fig.add_subplot(gs[1, 0])
im3 = ax3.imshow(slit_response_data,
cmap=palette,
origin='lower',
vmin=vmin,
vmax=vmax)
ax3.set_title("Reconstructed\n Slit response", fontsize=10)
ax3.set_xlim(0, data.shape[1])
ax3.set_xticks([])
ax3.set_ylim(0, data.shape[0])
ax3.set_yticks([])
ax3.tick_params(axis=u'both', which=u'both', length=0)
_ = [ax3.spines[s].set_visible(False) for s in ax3.spines]
divider = make_axes_locatable(ax3)
cax3 = divider.append_axes("right", size="5%", pad=0.05)
plt.colorbar(im3, cax=cax3)
# Display extensions ---
ax4 = fig.add_subplot(gs[1, 1])
ax4.set_xticks([])
ax4.set_yticks([])
_ = [ax4.spines[s].set_visible(False) for s in ax4.spines]
sub_gs4 = gridspec.GridSpecFromSubplotSpec(nrows=len(ad),
ncols=1,
subplot_spec=gs[1,
1],
hspace=0.03)
# The [::-1] is needed to put the fist extension in the bottom
for i, ext in enumerate(slit_response_ad[::-1]):
ext_data, ext_mask, ext_variance = _transpose_if_needed(
ext.data,
ext.mask,
ext.variance,
transpose=dispaxis == 1)
ext_data = np.ma.masked_array(ext_data, mask=ext_mask)
sub_ax = fig.add_subplot(sub_gs4[i])
im4 = sub_ax.imshow(ext_data,
origin="lower",
vmin=vmin,
vmax=vmax,
cmap=palette)
sub_ax.set_xlim(0, ext_data.shape[1])
sub_ax.set_xticks([])
sub_ax.set_ylim(0, ext_data.shape[0])
sub_ax.set_yticks([ext_data.shape[0] // 2])
sub_ax.set_yticklabels(
["Ext {}".format(len(slit_response_ad) - i - 1)],
fontsize=6)
_ = [
sub_ax.spines[s].set_visible(False)
for s in sub_ax.spines
]
if i == 0:
sub_ax.set_title(
"Multi-extension\n Slit Response Function")
divider = make_axes_locatable(ax4)
cax4 = divider.append_axes("right", size="5%", pad=0.05)
plt.colorbar(im4, cax=cax4)
# Display Signal-To-Noise Ratio ---
snr = data / np.sqrt(variance)
norm = vis.ImageNormalize(snr[~snr.mask],
stretch=vis.LinearStretch(),
interval=vis.PercentileInterval(97))
ax5 = fig.add_subplot(gs[0, 2])
im5 = ax5.imshow(snr,
cmap=palette,
origin='lower',
vmin=norm.vmin,
vmax=norm.vmax)
ax5.set_title("Mosaicked Data SNR", fontsize=10)
ax5.set_xlim(-1, data.shape[1])
ax5.set_xticks([])
ax5.set_ylim(-1, data.shape[0])
ax5.set_yticks(bin_center)
ax5.tick_params(axis=u'both', which=u'both', length=0)
ax5.set_yticklabels(
["Bin {}".format(i) for i in range(len(bin_center))],
fontsize=6)
_ = [ax5.spines[s].set_visible(False) for s in ax5.spines]
_ = [ax5.axhline(b, c='w', lw=0.5) for b in bin_limits]
divider = make_axes_locatable(ax5)
cax5 = divider.append_axes("right", size="5%", pad=0.05)
plt.colorbar(im5, cax=cax5)
# Display Signal-To-Noise Ratio of Slit Illumination ---
slit_response_snr = np.ma.masked_array(
slit_response_data / np.sqrt(slit_response_var),
mask=slit_response_mask)
ax6 = fig.add_subplot(gs[1, 2])
im6 = ax6.imshow(slit_response_snr,
origin="lower",
vmin=norm.vmin,
vmax=norm.vmax,
cmap=palette)
ax6.set_xlim(0, slit_response_snr.shape[1])
ax6.set_xticks([])
ax6.set_ylim(0, slit_response_snr.shape[0])
ax6.set_yticks([])
ax6.set_title("Reconstructed\n Slit Response SNR")
_ = [ax6.spines[s].set_visible(False) for s in ax6.spines]
divider = make_axes_locatable(ax6)
cax6 = divider.append_axes("right", size="5%", pad=0.05)
plt.colorbar(im6, cax=cax6)
# Save plots ---
fig.tight_layout(rect=[0, 0, 0.95, 1], pad=0.5)
fname = slit_response_ad.filename.replace(".fits", ".png")
log.info("Saving plots to {}".format(fname))
plt.savefig(fname)
return ad_outputs
def test_split_mosaic_into_extensions(request):
"""
Tests helper function that split a mosaicked data into several extensions
based on another multi-extension file that contains gWCS.
"""
astrofaker = pytest.importorskip("astrofaker")
ad = astrofaker.create('GMOS-S')
ad.init_default_extensions(binning=2)
ad = transform.add_mosaic_wcs(ad, geotable)
ad = gt.trim_to_data_section(
ad, keyword_comments={'NAXIS1': "", 'NAXIS2': "", 'DATASEC': "",
'TRIMSEC': "", 'CRPIX1': "", 'CRPIX2': ""})
for i, ext in enumerate(ad):
x1 = ext.detector_section().x1
x2 = ext.detector_section().x2
xb = ext.detector_x_bin()
data = np.arange(x1 // xb, x2 // xb)[np.newaxis, :]
data = np.repeat(data, ext.data.shape[0], axis=0)
data = data + 0.1 * (0.5 - np.random.random(data.shape))
ext.data = data
mosaic_ad = transform.resample_from_wcs(
ad, "mosaic", attributes=None, order=1, process_objcat=False)
mosaic_ad[0].data = np.pad(mosaic_ad[0].data, 10, mode='edge')
mosaic_ad[0].hdr[mosaic_ad._keyword_for('data_section')] = \
'[1:{},1:{}]'.format(*mosaic_ad[0].shape[::-1])
ad2 = primitives_gmos_longslit._split_mosaic_into_extensions(
ad, mosaic_ad, border_size=10)
if request.config.getoption("--do-plots"):
palette = copy(plt.cm.viridis)
palette.set_bad('r', 1)
fig = plt.figure(num="Test: Split Mosaic Into Extensions", figsize=(8, 6.5), dpi=120)
fig.suptitle("Test Split Mosaic Into Extensions\n Difference between"
" input and mosaicked/demosaicked data")
gs = fig.add_gridspec(nrows=4, ncols=len(ad) // 3, wspace=0.1, height_ratios=[1, 1, 1, 0.1])
for i, (ext, ext2) in enumerate(zip(ad, ad2)):
data1 = ext.data
data2 = ext2.data
diff = np.ma.masked_array(data1 - data2, mask=np.abs(data1 - data2) > 1)
height, width = data1.shape
row = i // 4
col = i % 4
ax = fig.add_subplot(gs[row, col])
ax.set_title("Ext {}".format(i + 1))
ax.set_xticks([])
ax.set_xticklabels([])
ax.set_yticks([])
ax.set_yticklabels([])
_ = [ax.spines[s].set_visible(False) for s in ax.spines]
if col == 0:
ax.set_ylabel("Det {}".format(row + 1))
sub_gs = gridspec.GridSpecFromSubplotSpec(2, 2, ax, wspace=0.05, hspace=0.05)
for j in range(4):
sx = fig.add_subplot(sub_gs[j])
im = sx.imshow(diff, origin='lower', cmap=palette, vmin=-0.1, vmax=0.1)
sx.set_xticks([])
sx.set_yticks([])
sx.set_xticklabels([])
sx.set_yticklabels([])
_ = [sx.spines[s].set_visible(False) for s in sx.spines]
if j == 0:
sx.set_xlim(0, 25)
sx.set_ylim(height - 25, height)
if j == 1:
sx.set_xlim(width - 25, width)
sx.set_ylim(height - 25, height)
if j == 2:
sx.set_xlim(0, 25)
sx.set_ylim(0, 25)
if j == 3:
sx.set_xlim(width - 25, width)
sx.set_ylim(0, 25)
cax = fig.add_subplot(gs[3, :])
cbar = plt.colorbar(im, cax=cax, orientation="horizontal")
cbar.set_label("Difference levels")
os.makedirs(PLOT_PATH, exist_ok=True)
fig.savefig(
os.path.join(PLOT_PATH, "test_split_mosaic_into_extensions.png"))
# Actual test ----
for i, (ext, ext2) in enumerate(zip(ad, ad2)):
data1 = np.ma.masked_array(ext.data[1:-1, 1:-1], mask=ext.mask)
data2 = np.ma.masked_array(ext2.data[1:-1, 1:-1], mask=ext2.mask)
np.testing.assert_almost_equal(data1, data2, decimal=1)
def tileArrays(self, adinputs=None, **params):
"""
This primitive combines extensions by tiling (no interpolation).
The array_section() and detector_section() descriptors are used
to derive the geometry of the tiling, so outside help (from the
instrument's geometry_conf module) is only required if there are
multiple arrays being tiled together, as the gaps need to be
specified.
If the input AstroData objects still have non-data regions, these
will not be trimmed. However, the WCS of the final image will
only be correct for some of the image since extra space has been
introduced into the image.
Parameters
----------
suffix: str
suffix to be added to output files
tile_all: bool
tile to a single extension, rather than one per array?
(array=physical detector)
sci_only: bool
tile only the data plane?
"""
log = self.log
log.debug(gt.log_message("primitive", self.myself(), "starting"))
timestamp_key = self.timestamp_keys[self.myself()]
suffix = params['suffix']
tile_all = params['tile_all']
attributes = ['data'] if params["sci_only"] else None
adoutputs = []
for ad in adinputs:
if len(ad) == 1:
log.warning("{} has only one extension, so there's nothing "
"to tile".format(ad.filename))
adoutputs.append(ad)
continue
array_info = gt.array_information(ad)
detshape = array_info.detector_shape
if not tile_all and set(array_info.array_shapes) == {(1, 1)}:
log.warning("{} has nothing to tile, as tile_all=False but "
"each array has only one amplifier.")
adoutputs.append(ad)
continue
if tile_all and detshape != (1, 1): # We need gaps!
geotable = import_module('.geometry_conf', self.inst_lookups)
chip_gaps = geotable.tile_gaps[ad.detector_name()]
try:
xgap, ygap = chip_gaps
except TypeError: # single number, applies to both
xgap = ygap = chip_gaps
kw = ad._keyword_for('data_section')
xbin, ybin = ad.detector_x_bin(), ad.detector_y_bin()
# Work out additional shifts required to cope with posisble overscan
# regions, including those in already-tiled CCDs
if tile_all:
yorigins, xorigins = np.rollaxis(
np.array(array_info.origins),
1).reshape((2, ) + array_info.detector_shape)
xorigins //= xbin
yorigins //= ybin
else:
yorigins, xorigins = np.zeros((2, ) +
array_info.detector_shape)
it_ccd = np.nditer(xorigins, flags=['multi_index'])
i = 0
while not it_ccd.finished:
ccdy, ccdx = it_ccd.multi_index
shp = array_info.array_shapes[i]
exts = array_info.extensions[i]
xshifts = np.zeros(shp, dtype=np.int32)
yshifts = np.zeros(shp, dtype=np.int32)
it = np.nditer(np.array(exts).reshape(shp),
flags=['multi_index'])
while not it.finished:
iy, ix = it.multi_index
ext = ad[int(it[0])]
datsec = ext.data_section()
if datsec.x1 > 0:
xshifts[iy, ix:] += datsec.x1
if datsec.x2 < ext.shape[1]:
xshifts[iy, ix + 1:] += ext.shape[1] - datsec.x2
if datsec.y1 > 0:
yshifts[iy:, ix] += datsec.y1
if datsec.y2 < ext.shape[0]:
xshifts[iy + 1:, ix] += ext.shape[0] - datsec.y2
arrsec = ext.array_section()
ext_shift = (models.Shift(
(arrsec.x1 // xbin - datsec.x1)) & models.Shift(
(arrsec.y1 // ybin - datsec.y1)))
# We need to have a "tile" Frame to resample to.
# We also need to perform the inverse, after the "tile"
# frame, of any change we make beforehand.
if ext.wcs is None:
ext.wcs = gWCS([(Frame2D(name="pixels"), ext_shift),
(Frame2D(name="tile"), None)])
elif 'tile' not in ext.wcs.available_frames:
#ext.wcs.insert_frame(ext.wcs.input_frame, ext_shift,
# Frame2D(name="tile"))
ext.wcs = gWCS([(ext.wcs.input_frame, ext_shift),
(Frame2D(name="tile"),
ext.wcs.pipeline[0].transform)] +
ext.wcs.pipeline[1:])
ext.wcs.insert_transform('tile',
ext_shift.inverse,
after=True)
dx, dy = xshifts[iy, ix], yshifts[iy, ix]
if tile_all:
dx += xorigins[ccdy, ccdx]
dy += yorigins[ccdy, ccdx]
if dx or dy: # Don't bother if they're both zero
shift_model = models.Shift(dx) & models.Shift(dy)
ext.wcs.insert_transform('tile',
shift_model,
after=False)
if ext.wcs.output_frame.name != 'tile':
ext.wcs.insert_transform('tile',
shift_model.inverse,
after=True)
# Reset data_section since we're not trimming overscans
ext.hdr[kw] = '[1:{},1:{}]'.format(*reversed(ext.shape))
it.iternext()
if tile_all:
# We need to shift other arrays if this one is larger than
# its expected size due to overscan regions. We've kept
# track of shifts we've introduced, but it might also be
# the case that we've been sent a previous tile_all=False output
if ccdx < detshape[1] - 1:
max_xshift = max(
xshifts.max(), ext.shape[1] -
(xorigins[ccdy, ccdx + 1] - xorigins[ccdy, ccdx]))
xorigins[ccdy, ccdx + 1:] += max_xshift + xgap // xbin
if ccdy < detshape[0] - 1:
max_yshift = max(
yshifts.max(), ext.shape[0] -
(yorigins[ccdy + 1, ccdx] - yorigins[ccdy, ccdx]))
yorigins[ccdy + 1:, ccdx] += max_yshift + ygap // ybin
elif i == 0:
ad_out = transform.resample_from_wcs(ad[exts],
"tile",
attributes=attributes,
process_objcat=True)
else:
ad_out.append(
transform.resample_from_wcs(ad[exts],
"tile",
attributes=attributes,
process_objcat=True)[0])
i += 1
it_ccd.iternext()
if tile_all:
ad_out = transform.resample_from_wcs(ad,
"tile",
attributes=attributes,
process_objcat=True)
gt.mark_history(ad_out,
primname=self.myself(),
keyword=timestamp_key)
ad_out.orig_filename = ad.filename
ad_out.update_filename(suffix=suffix, strip=True)
adoutputs.append(ad_out)
return adoutputs
def mosaicDetectors(self, adinputs=None, **params):
"""
This primitive does a full mosaic of all the arrays in an AD object.
An appropriate geometry_conf.py module containing geometric information
is required.
Parameters
----------
suffix: str
suffix to be added to output files.
sci_only: bool
mosaic only SCI image data. Default is False
order: int (1-5)
order of spline interpolation
"""
log = self.log
log.debug(gt.log_message("primitive", self.myself(), "starting"))
timestamp_key = self.timestamp_keys[self.myself()]
suffix = params['suffix']
order = params['order']
attributes = ['data'] if params['sci_only'] else None
geotable = import_module('.geometry_conf', self.inst_lookups)
adoutputs = []
for ad in adinputs:
if ad.phu.get(timestamp_key):
log.warning("No changes will be made to {}, since it has "
"already been processed by mosaicDetectors".format(
ad.filename))
adoutputs.append(ad)
continue
if len(ad) == 1:
log.warning("{} has only one extension, so there's nothing "
"to mosaic".format(ad.filename))
adoutputs.append(ad)
continue
if not all(
np.issubdtype(ext.data.dtype, np.floating) for ext in ad):
log.warning("Cannot mosaic {} with non-floating point data. "
"Use tileArrays instead".format(ad.filename))
adoutputs.append(ad)
continue
transform.add_mosaic_wcs(ad, geotable)
# If there's an overscan section in the data, this will crash, but
# we can catch that, trim, and try again. Don't catch anything else
try:
ad_out = transform.resample_from_wcs(ad,
"mosaic",
attributes=attributes,
order=order,
process_objcat=False)
except ValueError as e:
if 'data sections' in repr(e):
ad = gt.trim_to_data_section(ad, self.keyword_comments)
ad_out = transform.resample_from_wcs(ad,
"mosaic",
attributes=attributes,
order=order,
process_objcat=False)
else:
raise e
ad_out.orig_filename = ad.filename
gt.mark_history(ad_out,
primname=self.myself(),
keyword=timestamp_key)
ad_out.update_filename(suffix=suffix, strip=True)
adoutputs.append(ad_out)
return adoutputs
