Dear Matt,
This is intended.
The help message for fast currently says
-b output estimated bias field
whereas before it was
-ob: output bias correction field
Also, the conversion table between the two explicitly
states that the old version (-ob) was the reciprocal of
the current one. See:
http://www.fmrib.ox.ac.uk/fsl/fast4/index.html#convtable
All the best,
Mark
On 9 Sep 2008, at 06:26, Matt Glasser wrote:
> I have noticed that the bias field produced by Fast 4.1 now must be
> used to divide the original image to get the restored version,
> rather than being multiplied as before. I am wondering if this is
> intended or is a bug.
>
> Peace,
>
> Matt.
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