[Insight-users] SingleValueCostFunction

[Julien Jomier]

Hi Mark,

> Can I use SingleValuedCostFunction without gradient?
Yes you can use SingleValuedCostFunction without gradient if the
optimizer doesn't require gradient information.
In some cases, when the optimizer needs gradient information, you can
compute a "simple" gradient using finite differences, etc...

> Is there any optimizer for that purpose?
itkOnePlusOneEvolutionaryOptimizer is not using gradient so you can use
this one.
You can look at
Insight/Examples/Registration/ModelToImageRegistration1.cxx (and the
ItkSoftwareGuide) for an example regarding the implementation of this
optimizer.

Hope this helps

Julien

> -----Original Message-----
> From: insight-users-admin@public.kitware.com 
> [mailto:insight-users-admin@public.kitware.com] On Behalf Of 
> Mark Hastenteufel
> Sent: Friday, February 07, 2003 1:19 PM
> To: ITK Users
> Subject: [Insight-users] SingleValueCostFunction
> 
> 
> Hello!
> 
> Can I use SingleValuedCostFunction without gradient?
> Is there any optimizer for that purpose?
> 
> Mark
> 
> 
> 
> -- 
> Mark Hastenteufel
> Deutsches Krebsforschungszentrum         (German Cancer 
> Research Center)
> Div. Medical and Biological Informatics H0100    Tel: (+49) 
> 6221-42 2353
> Im Neuenheimer Feld 280                          Fax: (+49) 
> 6221-42 2345
> D-69120 Heidelberg              e-mail            
> M.Hastenteufel@DKFZ.de
> Germany                         
> http://www.dkfz.de/mbi/people/markh.html
> 
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