[Insight-users] Help with conjugate gradient optimizer

Ashish Poddar ahpoddar at gmail.com
Tue Jun 21 20:19:15 EDT 2005


Hi,
 I am using the ITK 2.0 version which I had downloaded around February this 
year. I am facing some problems with setting the CVS updates because of some 
firewall here. I hope to resolve it asap.
 Probably the compiled version 2.0 of ITK (i.e. the zip file on the ftp 
server) is having older versions of some of the files which probably someone 
should check if possible.
 with regards,
Ashish.

 On 6/21/05, Luis Ibanez <luis.ibanez at kitware.com> wrote: 
> 
> 
> Hi Ashish,
> 
> What ITK version are you using ?
> 
> We made some recent changes to the VNL adapted optimizers
> in order to make them report iterations.
> 
> If you update to the CVS version of ITK, you should get
> iteration events from the optimizer.
> 
> 
> Please let us know if you still find any problems.
> 
> 
> Thanks
> 
> 
> Luis
> 
> 
> 
> ----------------------
> Ashish Poddar wrote:
> 
> > I tried to plugin the observer like regular step gradient descent
> > optimizer, but it was never called for the internal iterations. Is
> > this a bug or a restraint for this algorithm?
> >
> > I was also trying to trace the code, and there is a provision of
> > preconditioning in which {vnl_conjugate_gradient::preconditioner_}
> > function is called. probably my guess is the observer can be linked in
> > here.
> >
> > any help / guidelines will be highly appreciated.
> >
> > with regards,
> > Ashish.
> >
> > --
> > Ashish Poddar
> > Have an acceptable reason for accepting anything.
> > Y:ashish_poddar | MSN:ashish_poddar at yahoo.com
> > <mailto:MSN:ashish_poddar at yahoo.com>
> >
> >
> > ------------------------------------------------------------------------
> >
> > _______________________________________________
> > Insight-users mailing list
> > Insight-users at itk.org
> > http://www.itk.org/mailman/listinfo/insight-users
> 
> 
> 
> 


-- 
Ashish Poddar
Have an acceptable reason for accepting anything.
Y:ashish_poddar | MSN:ashish_poddar at yahoo.com
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