Tor Olav Kristensen wrote:

> nomail@nomail wrote:
> 
> ...
> 
>> Thanks again for your help Tor.... But the contours of my geometry don't
>> have the same number of points in each slice.
>> More clearly, I cut a mouse into 240 slices to do a phantom for medical
>> applications. I need to re-build the mouse in 3D using the photos of the
>> slices.. The form of organs is not regular. I mean, they have a polygon
>> shape. Take the kidney for example: when I start the cut, it appears 
>> small,

>> and so
>> on for the other organs.
>> Another thing, I am looking for solid polygons and NOT for hollow

>> If it is posissible, I just want the method....Many thanks
> 
> 
> I think (but I'm not sure) that you can achieve what you want
> with POV-Ray if you put some work into it.
> 
> I don't have time to explain more right now, but in the mean
> time you can have a look at this page:
> 
> http://staff.aist.go.jp/r-suzuki/e/povray/iso/df_body.htm

I see that Ingo has suggested that you make df3-files from
your photos. I was thinking along the lines too.

For this to work, you need to get the different organs to
stand out visually in the grayscale TGA-images. I.e. they
need to be darker or lighter than their surroundings.
I don't know if this is already the case with your photos.

If not you can try to play around with different color
filtering techniques in a good (preferable scriptable)
image editing program. ("The Gimp" is scriptable IIRC.)

It is also necessary to establish a common reference grid
for the object slices in your images.

Another solution could be to get a MRI (or CT) scan of a
mouse and then convert the data into a df3 file for
rendering with POV-Ray.

-- 
Tor Olav
http://subcube.net
http://subcube.com

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nomail@nomail wrote:
...
 > Another thing, I am looking for solid polygons and NOT for hollow

...

Meshes can be made solid in POV-Ray. See "Solid Mesh" (2.3.2.3.1)
in the documentation. It's on this page:

http://www.povray.org/documentation/view/3.6.0/58/

-- 
Tor Olav
http://subcube.net
http://subcube.com

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<nomail@nomail> wrote in message
news:web.40f83f6530a9f2a0c523eabf0@news.povray.org...
> Tor Olav Kristensen <tor### [at] TOBEREMOVEDhotmailcom> wrote:
> > nomail@nomail wrote:
> >
> > If the number of sampled points from each slice contour
> > is equal, then you can write a little macro that produces
> > triangles that connects each pair of successive slices.
> >
> > (All the triangles can be merged into a mesh.)
> >
> > --
> > Tor Olav
> > http://subcube.net
> > http://subcube.com
>
> Thanks Tor for your response.
> I saw your web-site. The photos were great, but I am still newbie, and
your
> images are very complicated for me...
> Do you have a simple example??.
>
>
>

I think there are lots of ways of rebuilding your mouse.

A simple way of using your data to rebuild a slice would be to use the
points to draw a 2d spline and extrude it as a prism. You could then use
your photo as an image map on the slice to show the organs. You would need
to define 240 prisms to reconstruct your whole mouse.
I've used your data below in an example of two slices, applying an image to
the second. I've made the slices 5 units thick and spaced them 5 units
apart.

I'm not sure if this is quite what you're after, but I hope it might give
you some ideas:


camera {
  location <360, 240, -60>
  look_at <320, 224, 0>
}

light_source { <300, 400, -100>, rgb<1, 1, 1> }

prism {
  linear_sweep
  linear_spline
  0,         // height 1
  5,        // height 2
  84,       // number of points

<346, 224>,
<345, 224>,
<345, 227>,
<344, 227>,
<344, 229>,
<343, 229>,
<343, 231>,
<342, 231>,
<342, 232>,
<341, 232>,
<341, 233>,
<340, 233>,
<340, 234>,
<339, 234>,
<339, 235>,
<337, 235>,
<337, 236>,
<335, 236>,
<335, 237>,
<333, 237>,
<333, 238>,
<324, 238>,
<324, 237>,
<322, 237>,
<322, 236>,
<320, 236>,
<320, 235>,
<318, 235>,
<318, 234>,
<317, 234>,
<317, 233>,
<316, 233>,
<316, 232>,
<315, 232>,
<315, 231>,
<314, 231>,
<314, 229>,
<313, 229>,
<313, 227>,
<312, 227>,
<312, 224>,
<311, 224>,
<311, 215>,
<312, 215>,
<312, 212>,
<313, 212>,
<313, 210>,
<314, 210>,
<314, 208>,
<315, 208>,
<315, 207>,
<316, 207>,
<316, 206>,
<317, 206>,
<317, 205>,
<318, 205>,
<318, 204>,
<320, 204>,
<320, 203>,
<322, 203>,
<322, 202>,
<324, 202>,
<324, 201>,
<333, 201>,
<333, 202>,
<335, 202>,
<335, 203>,
<337, 203>,
<337, 204>,
<339, 204>,
<339, 205>,
<340, 205>,
<340, 206>,
<341, 206>,
<341, 207>,
<342, 207>,
<342, 208>,
<343, 208>,
<343, 210>,
<344, 210>,
<344, 212>,
<345, 212>,
<345, 215>,
<346, 215>
  pigment { rgb <1,1,0>}
  rotate -x*90
}


prism {
  linear_sweep
  linear_spline
  10,         // height 1
  15,         // height 2
  92,         // number of points
<346, 224>,
<345, 224>,
<345, 227>,
<344, 227>,
<344, 229>,
<343, 229>,
<343, 231>,
<342, 231>,
<342, 232>,
<341, 232>,
<341, 233>,
<340, 233>,
<340, 234>,
<339, 234>,
<339, 235>,
<338, 235>,
<338, 236>,
<337, 236>,
<337, 237>,
<335, 237>,
<335, 238>,
<332, 238>,
<332, 239>,
<324, 239>,
<324, 238>,
<321, 238>,
<321, 237>,
<319, 237>,
<319, 236>,
<318, 236>,
<318, 235>,
<317, 235>,
<317, 234>,
<316, 234>,
<316, 233>,
<315, 233>,
<315, 232>,
<314, 232>,
<314, 231>,
<313, 231>,
<313, 229>,
<312, 229>,
<312, 227>,
<311, 227>,
<311, 224>,
<310, 224>,
<310, 214>,
<311, 214>,
<311, 211>,
<312, 211>,
<312, 209>,
<313, 209>,
<313, 207>,
<314, 207>,
<314, 206>,
<315, 206>,
<315, 205>,
<316, 205>,
<316, 204>,
<317, 204>,
<317, 203>,
<318, 203>,
<318, 202>,
<319, 202>,
<319, 201>,
<321, 201>,
<321, 200>,
<324, 200>,
<324, 199>,
<332, 199>,
<332, 200>,
<335, 200>,
<335, 201>,
<337, 201>,
<337, 202>,
<338, 202>,
<338, 203>,
<339, 203>,
<339, 204>,
<340, 204>,
<340, 205>,
<341, 205>,
<341, 206>,
<342, 206>,
<342, 207>,
<343, 207>,
<343, 209>,
<344, 209>,
<344, 211>,
<345, 211>,
<345, 214>
<346, 214>

  texture {
    pigment {
      image_map {
        png "plasma3.png"
        map_type 0
        interpolate 2
      }
        scale 100
    }

  }

  rotate -x*90
}

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