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Message-ID:  <[log in to unmask]>
Date:         Mon, 12 Feb 2001 14:22:57 +1100
Reply-To:     ImageJ Interest Group <[log in to unmask]>
Sender:       ImageJ Interest Group <[log in to unmask]>
From:         "Goldsmith, Noel" <[log in to unmask]>
Subject:      : 3-D reconstructions from Stereo pairs

Hi,
I have been asked if I can develop a 3-D view of a structure from a pair of
radiographs, which are a stereo pair.
The radiographs have been taken by moving the object ( which is a panel made
from two sheets of aluminium separated by some aluminium honeycomb) across
the field of view of the X-Ray head, in such a way as to have -12, -6, 0, 6
and 12 degrees of tilt. I know this is not the same as tilting the object
about a central axis.
The stereo pairs work well,  you can see the depth in the object.
I see that it is possible to generate a 3d view of a surface, using a stereo
pair of it. (the image mailing list last week).
I also see that the problem becomes more subtle when you have translucent
objects, as radiographs provide.

We of course can have any number of  precise fiducial matching points as the
object is pretty well defined geometrically.

I have produced a 3-D projected view of a surface from a through focus
stack, but lack experience with the use of translucent stacks as are used in
biology (I think).

thanks in anticipation


Noel Goldsmith
       Aeronautical and Maritime Research Laboratory
> Airframes and Engines Division
> Defence Science and Technology Organisation
> ) Mail 506 Lorimer Street, Fishermens Bend Vic 3207 AUSTRALIA
> % Phone +61 3 9626 7527
> * Fax +61 3 9626 7089
> * email [log in to unmask]
>

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