[vtkusers] Rendering multiple volumes

[Aashish Chaudhary]

HI Dave,

Looks like the link you posted is wrong. Can you send us the right link?

Thanks,


On Thu, Nov 19, 2015 at 1:50 PM, dewarren <davideugenewarren+vtk at gmail.com>
wrote:

> Hi all,
>
>      Many thanks for the suggestions!  Although my project is still very
> much a work-in-progress, I've gotten some promising results.  I've posted
> two sample images on Imgur at http://imgur.com/a/KFFt.  These were created
> using two different approaches.
>
> 1) The lesion-extent image (red on grayscale) was created using two volumes
> loaded from NIFTI files: one containing the template brain; and the other
> containing a labelmap indicating healthy tissue vs. lesioned tissue.
> Assigning different color transfer functions according to labelmap values
> allowed me to get the effect that I wanted.  I created the labelmap using
> numpy and nibabel because I'm still more comfortable with those tools than
> with native VTK solutions.
> 2) The variable-intensity overlap image (black-to-yellow on grayscale) was
> created using four volumes from NIFTI files, one each for the RGBA channels
> of a non-independent-components volume.  This one took a bit more work in
> Numpy because I had to implement labelmasks and a color transfer function
> myself instead of defining one in the VTK part of the script.  Essentially,
> the grayscale portions of the image are from the template brain volume, the
> colored portions of the image are from a volume-occupying brain map of
> varying intensity, and relevant values from each were combined in a
> non-overlapping portions of a composite volume.
>
>      I think that the second approach (non-independent 4-component RGBA
> volumes) will probably be general enough to fulfill all my needs.  Doing
> things this way feels like a bit of a kludge, and I'm sure that much more
> could probably be accomplished using native VTK functions if I was a more
> knowledgeable VTK user.  However, I'm not going to complain too much
> because
> VTK's volume rendering results look great and it's all scriptable through
> Python!
>
>      Any thoughts or comments would be very welcome.  I hope to have a more
> thorough demonstration repository and/or blog post available relatively
> soon.  Best,
>
> Dave
>
>
>
>
>
> --
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> Sent from the VTK - Users mailing list archive at Nabble.com.
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-- 



*| Aashish Chaudhary | Technical Leader         | Kitware Inc.            *
*| http://www.kitware.com/company/team/chaudhary.html
<http://www.kitware.com/company/team/chaudhary.html>*
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