[vtkusers] question about the interpolation in the vtkImageReslice

[David Gobbi]

Hi Anja,

Tricubic uses a 4x4x4 grid and 3 cubic polynomials everywhere except at 
the edges of the image.

Or, if you have a 2D image instead of a 3D image, it uses a 4x4 square 
and 2 cubic polynomials.

 - David

 

Anja Ende wrote:
> Hi everyone,
>
> I have a question about the vtkImageReslice tricubic interpolation 
> alogorithm. Just trying to figure out what it actually does:
>
> So, I am guessing it takes the weighted average of the nearby pixels. 
> Just wondering how many pixels it takes into account. Is it a 4x4x4 
> grid (effectively 64 pixels and 3 cubic polynomials)?
>
> Thanks for any help you might give me.
>
> Cheers,
>
> Anja
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