[Insight-users] B-Spline Troubles

[Luis Ibanez]

Hi Kyzl,

                             Welcome to ITK !

Probably the best material to guide you in your exploration
of the BSpline deformable registration are the source code
examples in the directory:

               Insight/Examples/Registration

You will find

DeformableRegistration4.cxx
DeformableRegistration6.cxx
DeformableRegistration7.cxx
DeformableRegistration8.cxx
DeformableRegistration12.cxx
DeformableRegistration13.cxx
DeformableRegistration14.cxx
DeformableRegistration15.cxx


There are no "ideal" parameters for any segmentation or
registration method, regardless of what you may have
heard in paper that are published in Irreproducible journals.

We can look, however, for "reasonable" parameters.

Since you are starting to get familiar with the registration,
you probably want to start playing with a 2D version,
and using a grid of 5x5 nodes placed on top of the
image.

This is what you will find in

      Insight/Examples/Registration/
                    DeformableRegistration4.cxx


once you are comfortable with this example,
you may want to work your way up to
DeformableRegistration15.cxx which is a full
hierarchy of : Rigid + Affine + Two resolutions
of Deformable registration.

Please note that these Examples are also run
as Nightly tests, so you can actually just go to
the binary directory where you build ITK, and
reconfigure with CMake to turn ON the options
BUILD_TESTING and BUILD_EXAMPLES.

Then you can run the "DeformableRegistration"
examples by using ctest.


    Please let us know if you have any questions,


            Thanks


                 Luis


---------------------------------------------------------------
On Tue, Feb 9, 2010 at 7:58 PM, Kyzyl Herzog <kyzylh at gmail.com> wrote:
> Hi everyone,
>
> I've been having some trouble getting up and running with the B-Spline
> registration library. I'm attempting to do a B-Spline registration with a
> Mattes MI metric, however I'm finding the documentation regarding the
> B-Spline transform rather lacking (Perhaps I'm not looking in the right
> place? Software guide, class references, general googling).
>
> I'm running into trouble when I try to initialize the parameters for the
> transform. What are ideal values for GridSpacing, Region, Origin etc? I just
> haven't been able to find what specifically these pertain to, in context of
> ITK.
>
> As you can probably tell I'm fairly new to ITK, so if anyone has done
> something similar I would appreciate a hint or two.
>
> Thanks,
>
> Kyzyl
>
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