3 D Winter Party Report

[gjessing@xxxxx (Jan Gjessing)]

The 3-D winter party in Oslo gathered 20 ISU members and guests.
Except for gremlins that crept into the SIMDA 400W/36V slide projectors and
forced everything to be replaced, this time with Leitz Pradovit 250W/24V
slide projectors, no other technical problems occurred. A wide range of
stereoscopic images was shown from macro to hyper stereo taken from
aircraft's as well as tabletop studio works that looked like floating in mid
air.
For those who could not attend, this is what you missed out. 

A 3-D documentary collection of the Laterna Magica shows
from Hamar that took place in 1991, 93 and during olymic winter games in 94.
This last event, an official part of the cultural program for the games, was
a huge outdoor  and indoor event which took place around midnigh. This time
in winter condition at minus 26 Celsius, it was a real challenge both for
the photographers, camera, and not to forget, the actors and audience too.

Slides from a round trip of the outer Lofoten islands and a trip to
"Engabreen" glacier which advanced more than 100 meters the very last year.
It was shot with a fullframe 24x36mm SLR stereo camera.  

A few demonstration slides from a sequence of an ongoing project of Frame
Stop Animation (FSA) with the camera on a tripod, showed the autumn turn
into winter. 

The 3-D Laser pointer 
(first shown a few years ago) was at use for some images and pin pointing
for any x-y-z spot was easy, except for the brightest highlight in some slides.

The short anaglyph version of the film "Creature from the black lagoon"
showed repeated unacceptable vertical errors. We used with different
anaglyphic glasses, but the "heavy" print of the film gave unequal light
distribution as well as crosstalk all the way.  20min. was enough.

Auto anaglyphic slide projection.
This small slide sample sequence of images can be made with mixed
optikinetic projections, pin speck and pin hole devices to achieve their
anaglyphic mode, simply by  using poor optics! Limited to artistic purposed
it can be created as real-time transformation and even modulated by audio
input, possibilities  yet not exposed in public.

"Chroma-Depth 3D" viewing glasses
was then used to view the same auto anaglyphic images. They would now give a
different depth impression due to the colour itself acted as the depth
indicator. It's not based upon the fringe size of red or blue  to indicate
the variations of depth. Maybe by clever composition  surprising images can
be made. Perhaps it would demand glasses with build in dual modes of
decoding too.

Episcope projection. 
of colour anaglyph prints and postcards was the last projection fun of the
day. Since the projector was a very powerful Leitz projector both resolution
and brightness was very good.If the anaglyph print itself was  proper made,
then it would show almost no crosstalk in projection.

Demonstration of real-time anaglyph mode with a Mcintosh computer.
This demonstration added motion as well as selection of almost any rotation
axis, while keeping the moving stereo pairs properly viewable all the time.
The demo program can be downloaded from:

ftp://mac.uio.no/info-mac/_Graphic_%26_Sound_Tool/_Graphic/rotater-30.hqx

Program: 3D Rotater for Macintosh

In between the programs, equipment sales and demonstration took place.
This time we had enough time getting to know each other better too.

The evening was spend in a Hungarian Restaurant 5 min. walk away.

Jan
     
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