[Insight-users] dual processor

[indian rock]

I will try the coarse to fine registration technique. I guess, thats my only
choice.
Thanks again for your help Mark.

On 12/14/05, Mark Wyszomierski <markww at gmail.com> wrote:
>
>
>
> ---------- Forwarded message ----------
> From: Mark Wyszomierski <markww at gmail.com>
> Date: Dec 14, 2005 2:03 PM
> Subject: Re: [Insight-users] dual processor
> To: indian rock <indianrock at gmail.com>
>
> Ah sorry, my method would only work for multiple images/volumes.
> I know the registration process can be very time consuming - it would
> be great if the registration filters were internally multithreaded, though
>
> that would require a complex reworking of the algorithms I suppose...
> Luis always suggests using a coarse to fine registration method to reach
> convergence faster - have you tried implementing that? Maybe it will be your
> only time saver for now,
>
> Mark
>
>
> On 12/14/05, indian rock <indianrock at gmail.com > wrote:
> >
> > Hi Mark,
> >
> > No... the registration methods are not multithreaded internally...
> > Currently, all the pixel-wise filters support multithreading..... which
> > is part of registration.. So, running it on a dual processor will impact,
> > but not significant enough to notice any time save.
> >
> > I'm not registering multiple images/volumes.... just two images.... So,
> > multithreading the registration won't help me. I was looking more
> > specifically to multithread  the 'optimizer' and 'interpolator'.... I'm
> > running it on windows 2000 (Pentium III - single processor, 1GB RAM).
> >
> > Thanks..
> > IR.
> >
> > On 12/14/05, Mark Wyszomierski <markww at gmail.com > wrote:
> > >
> > >
> > >
> > > ---------- Forwarded message ----------
> > > From: Mark Wyszomierski < markww at gmail.com>
> > > Date: Dec 14, 2005 1:01 PM
> > > Subject: Re: [Insight-users] dual processor
> > > To: indian rock < indianrock at gmail.com>
> > >
> > > No, I didn't find any open source methods. Did you check if specific
> > > registration methods are internally multithreaded through ITK? (Maybe
> > > I'm getting mixed up with VTK). I thought some were though.
> > >
> > > What I did for myself though was to first create a thread pool with
> > > the number of processors available. Then simply start a loop registering
> > > your batch of images/volumes, letting registration threads that become free
> > > constantly be at work handling the next task in the batch. You only need
> > > one thread procedure where the ITK registration code lives, and in
> > > fact the most difficult part is setting up the efficient control loop which
> > > parses out the registration threads as they become free.
> > >
> > > What platform are you using?
> > >
> > > Mark
> > >
> > >
> > > On 12/14/05, indian rock <indianrock at gmail.com > wrote:
> > >
> > > > Mark,
> > > >
> > > > Thanks for the quick response.
> > > > Is the multithreaded reigstration code available open souce?
> > > >
> > > > Thanks,
> > > > IR.
> > > >
> > > > On 12/14/05, Mark Wyszomierski <markww at gmail.com > wrote:
> > > > >
> > > > > I've multithreaded my registration method to make use of multiple
> > > > > processors. As expected, the registration time is decreased by
> > > > > just about the number of processors available.
> > > > >
> > > > > Mark
> > > > >
> > > > >
> > > > >  On 12/14/05, indian rock < indianrock at gmail.com > wrote:
> > > > >
> > > > > > Hi,
> > > > > >
> > > > > > Currently, it takes around 4 minutes to do my registration using
> > > > > > ITK.
> > > > > >
> > > > > > Apart from optimizing the code (no. of iterations, step length,
> > > > > > etc)... are there any other ways, to speed up the registration?
> > > > > > Does anyone know if ITK makes use of a dual processor? Will an
> > > > > > additional processor impact the performance?
> > > > > >
> > > > > > Also, has anyone had experience with hardware accelerators? Do
> > > > > > those help in speeding up the registration?
> > > > > >
> > > > > > Any help will be highly appreciated..
> > > > > > Thanks,
> > > > > > IR.
> > > > > >
> > > > > > _______________________________________________
> > > > > > Insight-users mailing list
> > > > > > Insight-users at itk.org
> > > > > > http://www.itk.org/mailman/listinfo/insight-users
> > > > > >
> > > > > >
> > > > > >
> > > > >
> > > >
> > >
> > > _______________________________________________
> > > Insight-users mailing list
> > > Insight-users at itk.org
> > > http://www.itk.org/mailman/listinfo/insight-users
> > >
> > >
> > >
> >
>
> _______________________________________________
> Insight-users mailing list
> Insight-users at itk.org
> http://www.itk.org/mailman/listinfo/insight-users
>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://public.kitware.com/pipermail/insight-users/attachments/20051214/e0033476/attachment.html