Data access example
from psana import DataSource
ds = DataSource(exp='tmoc00318',run=10, dir='/cds/data/psdm/prj/public01/xtc')
orun = next(ds.runs())
det = orun.Detector('epix100')
for evt orun.events():
raw = det.raw.raw()
Direct methods of the detector interface
Hidden for AMI mask methods
For implementation of AMI most of the area detector interface methods are hidden - name starts with underscore "_".
In scripts these methods can be used directly:
DTYPE_MASK = np.uint8
o = det.raw
mask = o._mask_default(dtype=DTYPE_MASK)
mask = o._mask_calib()
mask = o._mask_calib_or_default(dtype=DTYPE_MASK)
mask = o._mask_from_status(status_bits=0xffff, gain_range_inds=(0,1,2,3,4), dtype=DTYPE_MASK, **kwa) # gain_range_inds for appropriate detectors
mask = o._mask_neighbors(mask, rad=9, ptrn='r')
mask = o._mask_edges(width=0, edge_rows=1, edge_cols=1, dtype=DTYPE_MASK, **kwa)
mask = o._mask_center(wcenter=0, center_rows=1, center_cols=1, dtype=DTYPE_MASK, **kwa)
mask = o._mask(status=True, status_bits=0xffff, gain_range_inds=(0,1,2,3,4),\
neighbors=False, rad=3, ptrn='r',\
edges=True, width=0, edge_rows=10, edge_cols=5,\
center=True, wcenter=0, center_rows=5, center_cols=3,\
calib=False,\
umask=None,\
force_update=False, dtype=DTYPE_MASK)
Usage of mask in methods det.calib and det.image
kwa = {'status':True, 'status_bits':0xffff, 'gain_range_inds':(0,1,2,3,4),\
'neighbors=False, 'rad':3, 'ptrn':'r',\
'edges':True, 'width':0, 'edge_rows':10, 'edge_cols':5,\
'center':True, 'wcenter':0, 'center_rows':5, 'center_cols':3,\
'calib':False,\
'umask':None,\
'force_update':False}
o = = det.raw
a = o.calib(evt, cmpars=(7,2,100,10), **kwa)
a = o.image(evt, nda=None, **kwa)
Cumulative mask example
epix10ka_raw_calib_image mask -e ueddaq02 -d epixquad -r211 -o fig-ueddaq02-r211-epixquad-mask.png -P
umask = np.ones((4, 352, 384), dtype=np.uint8)
umask[3,100:120,160:200] = 0
mask = det.raw._mask(status=True, status_bits=0xffff, gain_range_inds=(0,1,2,3,4),\
neighbors=True, rad=5, ptrn='r',\
edges=True, edge_rows=10, edge_cols=5,\
center=True, center_rows=5, center_cols=3,\
calib=False,\
umask=umask,\
force_update=False, dtype=DTYPE_MASK)
mask += 1 # for visibility of the mask 0 and 1 relative to image background
Class Mask
Alternative usage of mask methods is implemented in class Mask. Class Mask is a wrapper of hidden for AMI mask methods, which can be used to set dedicated mask parameters separately from all other detector interface optional parameters.
Instantiation of the Mask object and access methods
At instantiation of class Mask object, passed parameters used to evaluate requested mask and cache it in det._mask_ property.
from psana.detector.mask import Mask, DTYPE_MASK
m = Mask(det,\
status=True, status_bits=0xffff, gain_range_inds=(0,1,2,3,4),\
neighbors=True, rad=5, ptrn='r',\
edges=True, width=0, edge_rows=10, edge_cols=5,\
center=True, wcenter=0, center_rows=5, center_cols=3,\
calib=True,\
umask=test_umask(det),\
force_update=False, dtype=DTYPE_MASK)
m = Mask(det) # minimal version of the Mask object instantiation.
# All other methods are shotcuts to det._mask* methods w/o "_"
m = Mask(det)
m.set_mask(**kwa) # forced update of cached mask, **kwa - the same list of keyword arguments as in class Mask w/o det.
mask = m.mask(**kwa) # returns cached mask, **kwa - the same list of keyword arguments as in class Mask w/o det.
mask = m.mask_default()
mask = m.mask_calib_or_default() # if available returns mask from "pixel_mask" calibration type, otherwise array of ones.
mask = m.mask_from_status(status_bits=0xffff, gain_range_inds=(0,1,2,3,4), dtype=DTYPE_MASK)
mask = m.mask_edges(width=0, edge_rows=1, edge_cols=1, dtype=DTYPE_MASK)
mask = m.mask_center(wcenter=0, center_rows=1, center_cols=1, dtype=DTYPE_MASK)
mask = m.mask_neighbors(mask, rad=9, ptrn='r')
References
Overview
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