viewer

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0.1.138 viewer

Requires:

Synopsis
View an image or visibility data set

Description

The viewer will display images in raster, contour, vector or marker form. Images can be blinked, and movies are available for spectral-line image cubes. For measurement sets, many display and editing options are available.

The viewer can be run outside of casapy by typing ¡casaviewer¿.

Executing viewer ¡viewer¿ will bring up a display panel window, which can be resized. If no data file was specified, a Load Data window will also appear. Click on the desired data file and choose the display type; the rendered data should appear on the display panel.

A Data Display Options window will also appear. It has drop-down subsections for related options, most of which are self-explanatory.

The state of the viewer – loaded data and related display options – can be saved in a ’restore’ file for later use. You can provide the restore filename on the command line or select it from the Load Data window.

See the cookbook for more details on using the viewer.

Arguments


Inputs
infile	(Optional) Name of file to visualize.
	allowed:	string
	Default:
displaytype	(Optional) Type of visual rendering (raster, contour, vector or marker). lel if an lel expression is given for infile (advanced).
	allowed:	string
	Default:	raster
channel	(Optional) access a specific channel in the image cube
	allowed:	int
	Default:	0
zoom	(Optional) zoom in/out by increments
	allowed:	int
	Default:	1
outfile	(Optional) name of the output file to generate
	allowed:	string
	Default:
outscale	(Optional) amount to scale output bitmap formats (non-PS, non-PDF)
	allowed:	double
	Default:	1.0
outdpi	(Optional) output DPI for PS/PDF
	allowed:	int
	Default:	300
outformat	(Optional) format of the output e.g. jpg or pdf (this is overridden by the output files extension
	allowed:	string
	Default:	jpg
outlandscape	(Optional) should the output mode be landscape (PS or PDF)
	allowed:	bool
	Default:	False
gui	(Optional) Display the panel in a GUI.
	allowed:	bool
	Default:	True

Returns
void

Example

examples of usage:

viewer
viewer "myimage.im"
viewer "mymeasurementset.ms"
viewer "myrestorefile.rstr"

viewer "myimage.im", "contour"

viewer "’myimage1.im’ - 2 * ’myimage2.im’", "lel"

Keyword arguments:
infile -- Name of file to visualize
default: ’’
example: infile=’ngc5921.image’
If no infile is specified the Load Data window
will appear for selecting data.
displaytype -- (optional): method of rendering data
visually (raster, contour, vector or marker).
You can also set this parameter to ’lel’ and
provide an lel expression for infile (advanced).
default: ’raster’
example: displaytype=’contour’

Note: the filetype parameter is optional; typing of
data files is now inferred:
example: viewer infile=’my.im’
obsolete: viewer infile=’my.im’, filetype=’raster’
the filetype is still used to load contours, etc.

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