Sorry... didn't want to appear as annonymous in my previous message.....

Hi everyone!

I need some help! I've got a stack of 2D images that represent a series
of cross sections through an object. (This is biological data: sections
through animal tissue) I am trying to reconstruct certain structures
from this stack of images. Up to now I have been using a program called
IGL trace to draw contours around these structures in all of the images
and then exporting this information as a VRML object. Then I have to
convert it to POV format. Unfortunately the objects appear to be quite
"chuncky" in both VRML and POVRAY.

Is there some direct way to create a 3d modell (POVRAY) from a series of

contours?

Thanks a lot for any help!

Rene (rhe### [at] hotmailcom)

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Rene wrote:
> 
> Sorry... didn't want to appear as annonymous in my previous message.....
> 
> Hi everyone!
> 
> I need some help! I've got a stack of 2D images that represent a series
> of cross sections through an object. (This is biological data: sections
> through animal tissue) I am trying to reconstruct certain structures
> from this stack of images. Up to now I have been using a program called
> IGL trace to draw contours around these structures in all of the images
> and then exporting this information as a VRML object. Then I have to
> convert it to POV format. Unfortunately the objects appear to be quite
> "chuncky" in both VRML and POVRAY.
> 
> Is there some direct way to create a 3d modell (POVRAY) from a series of
> 
> contours?
> 
> Thanks a lot for any help!
> 
> Rene (rhe### [at] hotmailcom)

I don't know what you exactly mean by 2d contour files, if it's raster data, you
should have a look at the density file section in the pov documentation, if it's
a vector file you could write a program generating a triangle mesh. 

Christoph

--
Christoph Hormann <chr### [at] gmxde>
Homepage: http://www.schunter.etc.tu-bs.de/~chris/

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Rene <rhe### [at] hotmailcom> wrote:
: Sorry... didn't want to appear as annonymous in my previous message.....

  You can cancel messages.

-- 
main(i,_){for(_?--i,main(i+2,"FhhQHFIJD|FQTITFN]zRFHhhTBFHhhTBFysdB"[i]
):_;i&&_>1;printf("%s",_-70?_&1?"[]":" ":(_=0,"\n")),_/=2);} /*- Warp -*/

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Create a file that contains the stack of 2D images.  Then use the isosurface
function to create a 3D representation for a specific density value.

You can also create a POV density file from this data.  There are a number
of posts about utilities to do this from TGA files.  Look in
povray.binaries.utilities or search the news server for 'density' or df3.

Jim

"Rene" <rhe### [at] hotmailcom> wrote in message
news:39A4F5D5.2A291BA9@hotmail.com...
> Sorry... didn't want to appear as annonymous in my previous message.....
>
> Hi everyone!
>
> I need some help! I've got a stack of 2D images that represent a series
> of cross sections through an object. (This is biological data: sections
> through animal tissue) I am trying to reconstruct certain structures
> from this stack of images. Up to now I have been using a program called
> IGL trace to draw contours around these structures in all of the images
> and then exporting this information as a VRML object. Then I have to
> convert it to POV format. Unfortunately the objects appear to be quite
> "chuncky" in both VRML and POVRAY.
>
> Is there some direct way to create a 3d modell (POVRAY) from a series of
>
> contours?
>
> Thanks a lot for any help!
>
> Rene (rhe### [at] hotmailcom)
>
>
>

Post a reply to this message