[vtkusers] Resize vtkImageData

[Mathieu Coursolle]

Hi vtk users,

I have a 2D vtkImageData for which the dimensions in X and Y are  
differents. I'd like to convert it to a square vtkImageData, with my  
original image in the center of that new image.

I tried vtkImageConstantPad to resize my image, but then my original  
image is in the corner, not centered.

Is there a vtk class that could help me with that?

Thanks!

MAthieu