[Insight-users] Find the inverse of a deformation field

[Luis Ibanez]

Hi Guillaume,


What are the bugs that you mention in the filter
that computes the inverse deformation field ?

Could you please be more specific ?


We should simply fix those bugs...


Please let us know,


    Thanks


       Luis



-------------------------------------
Guillaume Janssens wrote:
> Hi,
> 
> I would like to find the inverse of a 3D-displacement field that I've
> computed with a deformable registration done with ITK. I saw that there
> was a method in ITK, but that some bugs remained. So I was thinking about
> another method but I wonder if this is really a good way to invert a field
> :
> The inversion could be done in 2 steps : - Deformation of the 3 components
> (each component is stored as a 3D-image) of the 3D-field by the field
> itself.
> - Multiplication of the deformed components of the field by -1.0, so that
> you get the displacement that go back to your original position. And you
> should have the inverse field, if I'm right.
> 
> But it seems to be too simple to be correct, so I wonder what could be
> wrong in this method ?
> 
> Every opinion would be greatly appreciated.
> 
> Guillaume.
> 
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