[Insight-users] Deformable registration: Number of grid points

[Luis Ibanez]

Hi Marco,

Could you please indicate *exactly* what variable you are modifying
in this source code example ?

In principle you can use any number of nodes for the BSpline grid.
There are no particular numbers of nodes that you are forced to
choose from.

You will simply be subject to the restrictions of your available RAM
and the computation time that it will take to run the registration.


    Regards,


             Luis


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On Thu, Jan 21, 2010 at 9:47 AM, marco giordano <marco.giord at gmail.com> wrote:
> Hi
>
> I am running DeformableRegistration8.cxx (in 3D). I want to change the
> number of grid points but I noticed that to me it works only for for some
> numbers (e.g 12,15 grid points)
> In other cases I get an error like:
> ....
> terminate called after throwing an instance of 'itk::ExceptionObject'
>   what():  /vol/itk/include/InsightToolkit/Common/itkMatrix.h:201:
> itk::ERROR: Singular matrix. Determinant is 0....
>
> To which matrix refers to?
> Does the number of grid points have some geometrical restrictions that I do
> not understand ?
>
> Thanks
>
>
> --
> M. Giordano
>
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