[Insight-users] Running multilevel image registration

[Luis Ibanez]

Hi Motes,


1) What Image metric are you using ?

2) If it is Mutual Information, could you please make
    sure that you are using the same number of samples
    in both scenarios of BSpline grid 12 * 12 * 12    ?

3) When it takes only 8 seconds,...
    does it still run 10 iterations ?

4) Have you compiling your code for Release ?
    (you shouldn't measure times with code
     compiled for Debug).


  Please let us know,


         Thanks


             Luis



------------------------------------------------------
On Wed, Dec 2, 2009 at 12:49 PM, motes motes <mort.motes at gmail.com> wrote:
> I run a multi-level image registration process using the
> BSplineDeformableTransform on a 3D image volume.
>
> In the first level I run with 6*6*6 nodes. In the second level I run
> with 8*8*8 nodes and in the last level I run with 12*12*12
>
>  Each level is run for 10 iterations (I know the is very low but I am
> currently in a testing phase).
>
> Now when it gets to the third level (12*12*12) the time used is around
> 40 seconds. But if I start with the 12*12*12 cube it only takes around
> 8 seconds.
>
> Any ideas on what might be the reason that the 12*12*12 level takes
> longer time when executed last? I have checked that data is not
> duplicated or allocated twice anywhere.
> _____________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at
> http://www.kitware.com/opensource/opensource.html
>
> Kitware offers ITK Training Courses, for more information visit:
> http://www.kitware.com/products/protraining.html
>
> Please keep messages on-topic and check the ITK FAQ at:
> http://www.itk.org/Wiki/ITK_FAQ
>
> Follow this link to subscribe/unsubscribe:
> http://www.itk.org/mailman/listinfo/insight-users
>