[Insight-developers] [Insight-users] Using image metric with identity transform.

[Luis Ibanez]

Hi Marius,

Since the IdentityTransform doesn't have any fixed nor varying 
parameters, we just didn't figure out what could be a sensible
implementation of the methods


       SetFixedParameters()
       GetFixedParameters()
       GetJacobian()
       SetParameters()
       GetParameters()


Presumably we could have them all manage arrays of zero size...


Any suggestions for a reasonable implementation of these methods
are welcome,


     Thanks


        Luis


----------------------------
M.Staring at lumc.nl wrote:
> Hi Brano,
> 
> that sounds reasonable to me. Also the GetJacobian is overridden in the
> IdentityTransform.
> 
> In this case we should also override the implementations of
> 
> SetFixedParameters
> GetFixedParameters 
> 
> and GetParameters as you suggested.
> 
> ITK developers, was there any reason not to override these functions for
> the IdentityTransform?
> 
> Marius
> 
> 
>>-----Original Message-----
>>From: insight-users-bounces at itk.org 
>>[mailto:insight-users-bounces at itk.org] On Behalf Of Branislav Goga
>>Sent: Friday, July 04, 2008 12:10 PM
>>To: insight-users at itk.org
>>Subject: Re: [Insight-users] Using image metric with identity 
>>transform.
>>
>>
>>Thank you for reply, I can see the point, this is exactly the 
>>way how I do it right now. But I think this is not clear 
>>design! Imagine you will proceed transforms of different type 
>>at this point of your application, now you have to check the 
>>type and switch. I think each class derived from 
>>itk::Transform<> should fullfill this interface. Identity 
>>transform can return itk::Array<> with 0 parameters, and 
>>everything will be ok. Can anybody find better solution that 
>>presented, please write it down. I`m very inquiring. 
>>--
>>View this message in context: 
>>http://www.nabble.com/Using-image-metric-with-identity-transfo
>>rm.-tp18275192p18276625.html
>>Sent from the ITK - Users mailing list archive at Nabble.com.
>>
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> 
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