| Re: Visualizing a 3D volume [message #8951] |
Tue, 20 May 1997 00:00 |
Chunguang Jia
Messages: 1
Registered: May 1997
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Junior Member |
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Paal Berg wrote:
> Visualizing a 3D volume
>
> I'm relativly new to IDL so I haven't the needed experience for this
> problem:
> I want to visualize a 3D volume given by a (n x n x n)-matrix. The
> entries in
> the matrix is either 1 or 0 and I want to plot the volume spanned by
> the ones. The polyshade and shade_volume routines are not useful,
> because it is not an isosurface I have and shade_volume doesn't give
> me a useful figure. I wonder if there exists some routines that will
> plot the surface of my volume or if there exists some other way of
> visualizing a 3D volume.
> All suggests are welcome!
>
> Paal Berg
I'm not sure, but you can try the VOXEL_PROJ or PROJECT_VOL function.
JCG
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| Re: Visualizing a 3D volume [message #8958 is a reply to message #8951] |
Tue, 20 May 1997 00:00  |
David Foster
Messages: 341
Registered: January 1996
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Senior Member |
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Paal Berg wrote:
>
> Visualizing a 3D volume
>
> I'm relativly new to IDL so I haven't the needed experience for this problem:
> I want to visualize a 3D volume given by a (n x n x n)-matrix. The entries in
> the matrix is either 1 or 0 and I want to plot the volume spanned by the ones. The polyshade and shade_volume routines are not useful, because it is not an isosurface I have and shade_volume doesn't give me a useful figure. I wonder if there exists some routines that will plot the surface of my volume or if there exists some other way of visualizing a 3D volume.
I would suggest starting with IDL's Slicer tool. It gives a "fair-to-
poor" 3D rendering, at least of NMR images. At the least, it might
provide a model for setting something up yourself. We converted a
volume created from a series of NMR slices of the human brain into
a 0's-and-1's map, and Slicer still gave a rendering similar to the
original volume. Perhaps this would work for your data.
It's generally accepted, I believe, that IDL's 3D rendering
capabilities are pretty limited.
Dave
--
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~
David S. Foster Univ. of California, San Diego
Programmer/Analyst Brain Image Analysis Laboratory
foster@bial1.ucsd.edu Department of Psychiatry
(619) 622-5892 8950 Via La Jolla Drive, Suite 2200
La Jolla, CA 92037
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~
"I have this theory that if we're told we're bad,
then that's the only idea we'll ever have.
But maybe if we are surrounded in beauty,
someday we will become what we see." - Jewel Kilcher
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