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You can easily do this without a computer. You just need two similar
projectors side by side and VERY carefully aligned so that both projected
images overlap perfectly. Then you fix two cheap video cameras a short
distance apart to the same flat supporting surface. You cut two discs from a
sheet of Polaroid material http://en.wikipedia.org/wiki/Polaroid and tape
them in front of each projection lens. One of these 'filters' should have
its polarising plane oriented vertically; the other horizontally. I'm not
sure which one goes on the left or the right projector, but you only have
two options.

That's it. Anything in front of the paired cameras will be projected onto
the screen in 3D for anyone wearing a normal pair of polarising 3D glasses.

Promoting public engagement with science
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-----Original Message-----
From: Informal Science Education Network
[mailto:[log in to unmask]] On Behalf Of Jon Haavie
Sent: 01 March 2010 13:39
To: [log in to unmask]
Subject: 3d exhibit

ISEN-ASTC-L is a service of the Association of Science-Technology Centers
Incorporated, a worldwide network of science museums and related
institutions.
****************************************************************************
*

Hi,

I would love to make a 3D exhibit where visitors can see themselves in 3D
(especially in these "Avatar" days).

The setup would be like this: Two cameras film the visitors. The signal is
merged to one image and projected on a wall. Visitors put on 3D glasses and
can see themselves in three dimensions.

Does anyone have any idea on how this could be done? 
(A 3d camera directly connected to a projector or 2 cameras connected to a
PC with appropriate software?)


Best regards,

Jon Haavie
----------------------------------------------------------
The Science Centre, 
The Norwegian Museum of Science and Technology,
http://www.tekniskmuseum.no/
Kjelsåsveien 143, N-0491 Oslo, Norway
Tlf. +47 22 79 60 77, Mob. +47 93 87 77 63

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