[Insight-users] itkLinearInterpolateImageFunction

[Andreas Schuh]

Hi Anja,

I haven't looked at the registration framework of ITK so far, but I  
would guess that you will have your images ALWAYS be sampled on a  
regular grid due to the itk::Image class. Therefore, a non-rigid  
registration will include a resampling after each iteration step. The  
input are images sampled on regular grids, the deformation field is  
applied to the moving image including a resampling this that the  
deformed moving image is again sampled on a regular grid.

--
regards
Andreas

On Jun 19, 2009, at 9:43 AM, Anja Ende <anja.ende at googlemail.com> wrote:

> Hello all,
>
> I was looking at the implementation of the linear interpolation filter
> in itk and found it in itkLinearInterpolateImageFunction.txx.
>
> This class assumes that the image sampled points lie on a regular
> grid, right? What about interpolation when doing non-rigid
> registration? The index points generated from the registration process
> would lie on an irregular grid, right? What interpolation classes
> could we use then?
> -- 
> Cheers,
>
> Anja
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