[vtkusers] Re: [Insight-users] Streaming large datasets with itk-vtk

[Kevin H. Hobbs]

On Fri, 2007-01-12 at 14:05 +0100, Jesús Spí­nola wrote:

> My first question is, given that pipeline, can I apply streaming to
> it? 
> second is, if i can, which filter is better to apply: the itk or the
> vtk one, and where? 
> if it's not possible to apply streaming this way, what can I do to
> solve the problem? Change the pipeline?

None of the ITK readers and writers support streaming right now. As a
result the readers read the whole image into memory. If there isn't
enough memory for one copy of the image this is a problem. Many of the
VTK readers DO support streaming, and only read enough of the file for
whatever filter is downstream. If you clip your image to show a slice,
or if you only want a VOI I'd use a VTK reader.

Most of the ITK filters support streaming, so you can do things like
VTKRead -> ITKFilter -> VTKWriter. Watch out for iterative filters
though.
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