Coverage for /wheeldirectory/casa-6.7.0-12-py3.10.el8/lib/py/lib/python3.10/site-packages/casatasks/imcollapse.py: 100%
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1##################### generated by xml-casa (v2) from imcollapse.xml ################
2##################### b131fe08644211a85ce28c27c66e74c8 ##############################
3from __future__ import absolute_import
4import numpy
5from casatools.typecheck import CasaValidator as _val_ctor
6_pc = _val_ctor( )
7from casatools.coercetype import coerce as _coerce
8from casatools.errors import create_error_string
9from .private.task_imcollapse import imcollapse as _imcollapse_t
10from casatasks.private.task_logging import start_log as _start_log
11from casatasks.private.task_logging import end_log as _end_log
12from casatasks.private.task_logging import except_log as _except_log
14class _imcollapse:
15 """
16 imcollapse ---- Collapse image along one axis, aggregating pixel values along that axis.
19 This task collapses an image along a specified axis or set of axes of
20 N pixels to a single pixel on each specified axis. Both float valued
21 and complex valued images are supported. It computes the specified
22 aggregate function for pixel values along the specified axes and
23 places those values in the single remaining plane of those axes in the
24 output image.
26 The reference pixel of the collapsed axis is set to 0 and its
27 reference value is set to the mean of the the first and last values of
28 that axis in the specified region of the input image. Convolution to a
29 common beam is not performed automatically as part of the
30 preprocessing before the collapse operation occurs. Therefore, if the
31 input image has per-plane beams, then the user should consider first
32 smoothing the data to have the same resolution, and use the resulting
33 image as the input for imcollapse.
35 --------- parameter descriptions ---------------------------------------------
37 imagename Name of the input image
38 Default: none
40 Example: imagename='ngc5921.im'
41 function Function used to compute aggregation of pixel values
42 along the collapsed axis.
43 Default: none
44 Options: flux, madm, max, mean, median, min,
45 npts, rms, stddev, sum, variance, xmadm
47 Minimum match is supported for the function
48 parameter (eg, function="r" will compute the rms
49 of the pixel values).
51 If one specifies function='flux', the following
52 constraints must be true:
53 1. The image must have a direction coordinate,
54 2. The image must have at least one beam,
55 3. The specified axes must be exactly the
56 direction coordinate axes,
57 4. Only one of the non-directional axes may be
58 non-degenerate,
59 5. The iamge brightness unit must be conformant
60 with x*yJy/beam, where x is an optional unit
61 (such as km/s for moments images) and y is an
62 optional SI prefix.
63 axes Zero-based axis number(s) or minimal match strings to
64 collapse.
65 Default: [0]
66 Axes can be specified as a single integer or
67 array of integers indicating the zero-based axes
68 along which to collapse the image. Axes may also
69 be specified as a single or array of strings
70 which minimally and uniquely match (ignoring
71 case) world axes names in the image (eg "dec" or
72 ["ri, "d"] for collapsing along the declination
73 axis or along the right ascension and declination
74 axes, respectively).
75 outfile Name of output CASA image. Must be specified.
76 Default: none
78 Example: outfile='collapsed.im'
79 box Rectangular region to select in direction plane.
80 Default: '' (use the entire direction plane)
82 Example: box="100,100,200,200"
83 region Region selection.
84 Default: '' (use the full image)
85 chans Channels to use.
86 Default: '' (use all channels)
87 stokes Stokes planes to use.
88 Default: '' (use all stokes planes)
89 mask Mask to use.
90 Default: none
91 overwrite Overwrite output image if it exists?
92 Default: False
93 Options: False|True
94 stretch Stretch the mask if necessary and possible?
95 Default: False
96 Options: False|True
98 Stretch the input mask if necessary and
99 possible. Only used if a mask is specified.
100 [1;42mRETURNS[1;m bool
102 --------- examples -----------------------------------------------------------
105 FOR MORE INFORMATION, SEE THE TASK PAGES OF IMCOLLAPSE IN CASA DOCS:
106 https://casa.nrao.edu/casadocs/
109 """
111 _info_group_ = """analysis"""
112 _info_desc_ = """Collapse image along one axis, aggregating pixel values along that axis."""
114 def __call__( self, imagename='', function='', axes=[ ], outfile='', box='', region='', chans='', stokes='', mask='', overwrite=False, stretch=False ):
115 schema = {'imagename': {'type': 'cReqPath', 'coerce': _coerce.expand_path}, 'function': {'type': 'cStr', 'coerce': _coerce.to_str}, 'axes': {'type': 'cVariant', 'coerce': [_coerce.to_variant]}, 'outfile': {'type': 'cStr', 'coerce': _coerce.to_str}, 'box': {'type': 'cStr', 'coerce': _coerce.to_str}, 'region': {'type': 'cStr', 'coerce': _coerce.to_str}, 'chans': {'type': 'cStr', 'coerce': _coerce.to_str}, 'stokes': {'type': 'cStr', 'coerce': _coerce.to_str}, 'mask': {'type': 'cStr', 'coerce': _coerce.to_str}, 'overwrite': {'type': 'cBool'}, 'stretch': {'type': 'cBool'}}
116 doc = {'imagename': imagename, 'function': function, 'axes': axes, 'outfile': outfile, 'box': box, 'region': region, 'chans': chans, 'stokes': stokes, 'mask': mask, 'overwrite': overwrite, 'stretch': stretch}
117 assert _pc.validate(doc,schema), create_error_string(_pc.errors)
118 _logging_state_ = _start_log( 'imcollapse', [ 'imagename=' + repr(_pc.document['imagename']), 'function=' + repr(_pc.document['function']), 'axes=' + repr(_pc.document['axes']), 'outfile=' + repr(_pc.document['outfile']), 'box=' + repr(_pc.document['box']), 'region=' + repr(_pc.document['region']), 'chans=' + repr(_pc.document['chans']), 'stokes=' + repr(_pc.document['stokes']), 'mask=' + repr(_pc.document['mask']), 'overwrite=' + repr(_pc.document['overwrite']), 'stretch=' + repr(_pc.document['stretch']) ] )
119 task_result = None
120 try:
121 task_result = _imcollapse_t( _pc.document['imagename'], _pc.document['function'], _pc.document['axes'], _pc.document['outfile'], _pc.document['box'], _pc.document['region'], _pc.document['chans'], _pc.document['stokes'], _pc.document['mask'], _pc.document['overwrite'], _pc.document['stretch'] )
122 except Exception as exc:
123 _except_log('imcollapse', exc)
124 raise
125 finally:
126 task_result = _end_log( _logging_state_, 'imcollapse', task_result )
127 return task_result
129imcollapse = _imcollapse( )