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Basic Information on vblank
Purpose: mask outlier pixels on the spectral axis
VBLANK takes a cube that has already been masked and masks it
further so that unmasked pixels that are surrounded by only
masked pixels along axis 1 will be masked. The default is to
mask if both adjacent pixels are masked; one can increase the
window size with keyword 'tol'.
This can be useful for reducing noise in a datacube that has
already been masked with a smoothed cube and where the velocity
field is assumed to be smooth. In this case axis 1 would be the
velocity axis and spikes far from the channels of actual
emission are masked.
NOTE: Because flagging is only implemented for planes, the
spectral axis must be axis 1. Use REORDER first to make this
reorder in=file1 out=file2 mode='312'
reorder in=file2 out=file3 mode='231'
Standard keyword in. See the help on in for more information.
How far (in pixels) the nearest unmasked pixel can be for the
given pixel to stay unmasked. Default is 1.
Revision: 1.3, 2011/04/04 05:56:01 UTC
Generated by email@example.com on 21 Jun 2016