[Insight-users] Write new image registration metric

[Lydia Ng]

Hi Dana,

This seems a little strange - have you try adding some printout
statements to track what's going on?

- Lydia


On 7/21/05, Dana Paquin <dpaquin at stanford.edu> wrote:
> Hi all,
> 
> I would like to know how to modify the existing ITK registration metrics
> to study the effect of a given metric on the registration process.  For
> example, suppose that I start with the itkMeanSquaresImageToImageMetric
> (as in ImageRegistration5.cxx).  To illustrate the process, suppose that
>  I want the metric to be (1/4)*(mean squares).  In the file
> itkMeanSquaresImageToImageMetric.txx, I tried changing measure+=
> diff*diff to measure+=(diff*diff)*0.25, then saved this file and
> recompiled ImageRegistration5.  However, this had no effect on the
> metric values computed during the registration process.  Are there other
> files that I need to modify?  Can someone tell me what I need to do in
> order to modify a metric and then use that metric in the registration
> process?
> 
> Thanks in advance,
> Dana
> 
> Karthik Krishnan wrote:
> > The following earlier post might help:
> > http://public.kitware.com/pipermail/insight-users/2005-July/013868.html
> > http://public.kitware.com/pipermail/insight-users/2005-July/013866.html
> >
> > The last three paramters correspond to the translation, not the offset.
> > Take a look at the SoftwareGuide or the aforementioned mails to see the
> > difference.
> >
> > Thanks
> > regards
> > karthik
> >
> > Florence Dru wrote:
> >
> >> hello,
> >> I'm running registration using the Euler3DTransform and I want to make
> >>    sure that I'm analyzing the right figures :
> >>        - if I want to get the real final offset I have to call the
> >> "GetOffset()" function don't I ? because if I only look at what I get
> >>    calling the "GetParameters()" function the last three parameters
> >> don't    really correspond to the final offset.
> >>    Thank you beforehand for confirming or correcting.
> >>
> >> Florence
> >>
> >>
> >>
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