[vtkusers] Visualizing Binary Volumes

[Janna]

Janna wrote:

> Does anyone know of a pipeline to quickly visualize binary volumes (from
> a CT scan of the humerus 512x512 with 1.3mm z spacing) as an actor?
>
> Both of the following  pipelines result in an actor with values through
> the entire actor.  I'm only really interested in viewing the surface of
> the bone (rather that the data in the middle).  Is there a way to save
> just the surface?
>
>    I've been using:
> binary
> data-->vtkStructuredPointsReader-->vtkContourFilter-->vtkPolyDataMapper-->vtkActor
>
>    but this takes a very long time to render and the interactivity is
> slow as well.
>
>    Another thing I've tried is:
> binarydata-->vtkStructuredPointsReader-->vtkContourFilter-->vtkPolyDataConnectivityFilter-->vtkPolyDataWriter-->savedfile
>
>    to save the rendered image along the way, then use this saved image
> to create the actor:
> savedfile-->vtkPolyDataReader-->vtkDecimatePro-->vtkPolyDataNormals-->vtkPolyDataMapper-->vtkActor
>
>    this takes less time, but it is still slow.
>
> Any help with this would be great!!!
>
> Janna Balling
> balling at sci.utah.edu