Hello all!

Judging by its name which doesn't contain the word "Image", vtkExtractVOI is not an imaging filter, so it's not supposed to support streaming. I looked for an equivalent imaging filter and found two that seemed plausible: vtkImageShrink3D and vtkImageResample. The former seems to change the volume's dimensions, which leaves me with the latter, but I'm not sure I understand its semantics.

Questions:

1. Does vtkExtractVOI support streaming despite its name?

2. Did I overlook any filter which might be more suitable for this purpose than the ones I mentioned?

3. Is there any way to get vtkImageShrink3D to do just subsampling, without changing the volume's dimensions?

4. What are the semantics of vtkImageResample::SetAxisMagnificationFactor() ?

Thanks in advance,

Ron