[ITK] [ITK-users] Fwd: 3D registration with level set motion

[Dženan Zukić]

Hi Marie,

an obvious thing to ask: are you running it in debug or release mode? The
difference is usually huge.

B-spline registration for your image could take a few minutes - 20 minutes
for a single iteration sounds too long. A classic trick for speeding up
registration is using multi-resolution approach. It usually involves more
code and a lot more testing, though.

Regards,
Dženan Zukić, PhD, Senior R&D Engineer, Kitware (Carrboro, N.C.)

On Sat, Aug 5, 2017 at 4:00 PM, CocoM <cgo_2113 at hotmail.com> wrote:

> Thanks a lot it's almost working now!
>
> I have another question, about the running time.
> I don't know anything about it but I'm surprised by the time needed for the
> algorithm to be done. I'm using the example DeformableRegistration5 (level
> set PDE solving), but I changed it to use B-spline interpolation. The
> running time is huge for 3D ; for 2D it takes a little less than 3 minutes
> and for 3D, I need approximately 20 minutes by iteration, so imagine the
> time needed by the whole process... My test image is 512x512x43, the
> algorithm is multi threads. I'm working on a six years old Asus laptop
> (X53S), nothing extraordinary. I couldn't say exactly what my CPU is but
> it's a Intel core i5. I know it's not great material but still, I feel like
> it's very slow. So could someone tell me if it's normal?
>
> The thing is I didn't change much, so I guess it is, but I wanted to ask
> anyway.
>
> Plus, if anyone has any idea to speed up the process, except buying a
> better
> computer, it would be really great!
>
> Thanks a lot,
> Marie
>
>
>
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