[vtkusers] mis-registered volume and extracted surfaces.

[Jeremy Winston]

Dongbai Guo wrote:
> I am trying to overlay the extracted surfaces on top of the volume.
> Without applying any transformation. If I limited the image extent
> with a vtkExtractVOI filter. The result surface and volume will
> be mis-aligned, looks like it is the volume that is no longer centered
> at origin, but rather the volume center.  Yet the bounds I get (using
> GetBounds function) for  all volume/surfaces are extractly the same.
> And the outline I get for the volume is also centered at origin.
> 
> I am using TIFFReader to read volume slices and this is
> vtk4.2 running on Linux (Redhat Fedora).
> 
> Is this a bug or an expected behavior?

Expected behavior.  Cf.
http://public.kitware.com/pipermail/vtk-developers/2003-April/002424.html

-Jeremy