Source
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<input>
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<param type="string" name="imagename" mustexist="true" >
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<description>Name of the input image</description>
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<value></value>
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<example>imagename='ngc5921_task.image'</example>
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</param>
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<param type="any" name="region">
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-
<description>Region selection. Default is to use the full image.</description>
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<description>Region selection. Empty string (default) means use rules for box/chans/stokes specification.</description>
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<any type='variant' limittype='string stringArray'/>
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<value type='string'/>
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</param>
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<param type="string" name="box">
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<description>Rectangular region(s) to select in direction plane. Default is to use the entire direction plane.</description>
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<description>Rectangular region(s) to select in direction plane. Empty string (default) means use the reference pixel.</description>
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<value/>
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</param>
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<param type="string" name="chans" >
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<description>Channels to use. Default is to use all channels.</description>
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<value/>
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</param>
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<param type="string" name="stokes">
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<description>Stokes planes to use. Planes specified must be contiguous. Default is to use all Stokes planes.</description>
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2. A region specified by a set of rectangular
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pixel coordinates, the channel ranges and/or the Stokes.
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For directed output, run as
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myoutput = imval()
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Keyword arguments:
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imagename -- Name of input image
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Default: none; Example: imagename='ngc5921_task.im'
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region -- Region selection. Default is to use the full image.
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region -- Region selection. Empty string (default) means use rules for box/chans/stokes specification.
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Example: region='myimage.im.rgn'
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region='region1'
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box -- Rectangular region to select in direction plane. Default is to use the entire direction plane.
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box -- Rectangular region to select in direction plane. Empty string (default) means use the reference pixel.
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Default: '' (referencepixel values for the Directional coord);
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Example: box='10,10,50,50'
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box = '10,10,30,30,35,35,50,50' (two boxes)
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chans -- Channels to use. Default is to use all channels.
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stokes -- Stokes planes to use. Planes specified must be contiguous. Default is to use all Stokes planes.
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Example: stokes='IQUV';
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stokes='I,Q'
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General procedure:
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