[Insight-users] problems on deformable registration 8

[Luis Ibanez]

Hi Sean,


I'm wondering if this could be an aliasing effect
between the BSpline grid and the grid of your image.


But other suspects are:


    1) and Interpolator issue in the border

    2) an issue with the Optimizer



Please do the following:


    Pass your images as input to

      DeformableRegistration15.cxx


    This program uses a different Optimizer.


    That may help to eliminate (2) above.


If things still fail....


Then we will ask you to send your images to us.
So we can try to replicate the problem here.



    Thanks


       Luis



--------------------
Sean Lee wrote:
> Hi, Luis,
> 
> I found that another parameter could affect the result. If I 
> change gridSizeOnImage.Fill( 8 ) to 
> gridSizeOnImage.Fill( 10 ), it could result in the case with 59 slices 
> that used to run 34 iterations 
> only run one iteration.
> 
> So it is really depending on the parameters you input.
> 
> Thanks.
> 
> Sean
> 
> ------------------------------------------------------------------------
> From: kevinseanlee at live.com
> To: luis.ibanez at kitware.com
> Date: Thu, 9 Jul 2009 12:53:39 -0500
> CC: insight-users at itk.org
> Subject: Re: [Insight-users] problems on deformable registration 8
> 
> Hi, Luis,
> 
> I am trying to provide more information and tested it with several other 
> numbers. Here is the results.
> 
> 29, 56, 57, 58, 60 slices: 1 iteration with a bad result.
> 
> 30 slices; 45 iterations with a good result. (of course, only half 
> volume is matched)
> 59 slices; 34 iterations with a good result.
> 
> Let me know what I can do for this issue.
> 
> Thanks.
> 
> Sean
>