[Insight-users] Image to Image Metrics

[Fischer, Sven]

Hi Luis,

Thank you very much for your reply. I had a look at the example. But it's not exactly doing what I want. If I understand correct the Insight/Examples/Registration/MeanSquaresImageMetric1.cxx example calculates the metric values for different transformations. But I only need the maxima or minima. I can see approximately where they are when I look at the plot, but I can't find the exact position. 

I want to use multi-resolution. And it seems to me that the optimizer finds an optimum at coarser resolution that is away from the one I want to find. So I want to use several starting points when I go to higher resolution.

Sven


-----Ursprüngliche Nachricht-----
Von: Luis Ibanez [mailto:luis.ibanez at kitware.com] 
Gesendet: Mittwoch, 23. Juli 2008 14:34
An: Fischer, Sven
Cc: insight-users at itk.org
Betreff: Re: [Insight-users] Image to Image Metrics


Hi Sven,

You may want to look at the example:

    Insight/Examples/Registration/MeanSquaresImageMetric1.cxx

This will plot the values of a metric for a range of the
transform parameters (in this case, a simple translation).

You will find this example described in the ITK Software Guide


      http://www.itk.org/ItkSoftwareGuide.pdf


Note that for transforms with larger number of parameters
it is harder to sample the cost function (image metric)...


--

What Transform are you using ?


     Please let us know,


          Thanks


              Luis


--------------------
Fischer, Sven wrote:
> Hi all,
> 
> 
>   *I want to look at several maxima or minima of some Image to Image
>   Metrics, like GradientDifferenceImageToImageMetric or
>   MattesMutualInformationImageToImageMetric. Does someone know how I can
>   get these values and the position? Thank you in advance.*
> 
> 
>   *Regards,*
> 
> 
>   *Sven*
> 
> 
> ------------------------------------------------------------------------
> 
> _______________________________________________
> Insight-users mailing list
> Insight-users at itk.org
> http://www.itk.org/mailman/listinfo/insight-users