[VoxBo] Finding geometric center

[David January]

Hi Dan,

Just to give more information on the bug:

vbregion begins to report min values when you include a threshold
(I've been using -t .01 just to throw a number at it), however, the
min and the geometric center are always the same.

Also, it wasn't clear to me whether you meant to indicate that
vbimagemunge had the geometric center functionality in it already or
you were planning on adding it.  I used vbimagemunge -- regioninfo and
didn't see the center functionality, but I might have missed a flag or
something.

-David

On Wed, Sep 3, 2008 at 10:52 AM, Daniel Kimberg
<kimberg at mail.med.upenn.edu> wrote:
> David January wrote:
>> I want to report the geometric center or center of mass of some masks
>> I've isolated.  I've been using vbregion, which tells me the location
>> of the peak, but for the min voxel and geometric center voxel, the
>> ouptut is 0,0,0.  Can this be fixed or is there another way to find
>> the geometric center?
>
> I'm in the process of updating a lot of VoxBo's tools for doing region and mask manipulation, and most of the functionality will be available in vbimagemunge as well, so you can combine it with other image processing operations.  I'll try to get an update out for this pretty soon, and the plan is to fold in some simple coordinate transformations.  In the meantime, let me know if there are other issues or missing features.
>
> dan
>
> ps  vbimagemunge is too hard to type.  i may rename it vbmunge, since i don't think anyone's using the old vbmunge.  but suggestions for other names are welcome.
>



-- 
David January
Department of Psychology
University of Pennsylvania
http://www.sas.upenn.edu/~djanuary/