--robust
Perform robust averaging, features that are outside 1 standard
deviation from the mean are downweighted. Works well for noisy data
with artifacts. see the --tmpdir option if you have a large number
of input files.
--robust_cutoff
Requires two floating point numbers following the argument. This
defines the cutoff points for robust averaging. The default of
--robust_cutoff 1.0 1.2 means that any data more than 1.0 standard
deviation from the average will be linearly downweighted until 1.2
standard deviations from the mean at which point the weighting will
be zero.
https://github.com/BIC-MNI/minc-widgets/blob/master/mincbigaverage/mincbigaverage
https://github.com/BIC-MNI/minc-widgets/blob/master/mincbigaverage/mincbigaverage#L194-L246