[MINC-users] mincstats -mask

[Alex ZIJDENBOS]

Actually, perhaps '-binvalue 1' is a bit too restrictive. I've seen
people create masks with values higher than one (e.g., using
Display). I think that assuming a "mask" is made up of zero- and
non-zero values (with a bit of tolerance perhaps for roundoff) would
be reasonable. But if that's not general enough (I suppose that was
Peter's argument?), generating an error message when the mask
treatment is undefined makes sense too.

volume_stats, mincstats predecessor, does the former (without
tolerance though). If a mask is present but no extrema are given,
it'll test for mask value != 0.

-- A

On Wed, Jul 20, 2005 at 05:33:38PM -0400, Andrew Janke wrote:
> Sounds fair to me.
> 
> Peter and I discussed this at length when we first wrote the thing but
> never managed to come to agreement.
> 
> What has just been suggested is what I was hammering for... :)
> 
> 
> a
> 
> On 20/07/05, Robert VINCENT <bert@bic.mni.mcgill.ca> wrote:
> > Hi Alex,
> > 
> > This appears to be unchanged.  I hadn't been aware of the problem.
> > 
> > I think adding some kind of default behavior such as -mask_binvalue 1
> > would not break anything.  But I'm curious to hear other's opinions.
> > 
> >         -bert
> > 
> > 
> > On Wed, 20 Jul 2005, Alex ZIJDENBOS wrote:
> > 
> > > A kind soul just alerted me to something possibly confusing with
> > > mincstats, being that it will (silently) ignore a -mask argument if
> > > not given at least one of -mask_{floor,ceil,range,binvalue}.
> > >
> > > In other words, the call
> > >
> > >    mincstats -mask <mask.mnc> -floor <your_favorite_treshold> <in.mnc>
> > >
> > > does nothing with <mask.mnc>. Although this is stated in the man page,
> > > I suspect it is counterintuitive to many people; it seems to me
> > > mincstats should either do something sensible with the mask (i.e.,
> > > default to '-mask_binvalue 1'), or barf when given a mask argument
> > > which is not used.
> > >
> > > I have a vague recollection of this being discussed before, but has it
> > > been fixed in recent releases of minc?
> > >
> > > -- A
> > > _______________________________________________
> > > MINC-users@bic.mni.mcgill.ca
> > > http://www.bic.mni.mcgill.ca/mailman/listinfo/minc-users
> > >
> > 
> > _______________________________________________
> > MINC-users@bic.mni.mcgill.ca
> > http://www.bic.mni.mcgill.ca/mailman/listinfo/minc-users
> > 
> 
> 
> -- 
> Andrew Janke      (a.janke@gmail.com || www.cmr.uq.edu.au/~rotor)
> Canada->Montreal                                   Cell: +1 (514) 924 2012
> 
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