P3D Hybrid viewing of animated stereogram!

[Jan Gjessing <jgjessin@xxxxxxxxx>]

Hybrid stereo viewing discovery
By experimenting with a controlled blend of apparent depth
cues/input(2-D) and stereopsis(3-D), we can discover what the brain will
select and present as it tries to process such information. By proper
set up we can find out if stereopsis might override other depth cues or
not. At the site mentioned below, we have several good examples to carry
out for a test. The site contains line art animated stereograms for
parallel or crossed eyed viewing. At the same time these nice
animation's are perfect for viewing with ChromaDepth* glasses, because
of the use of strong pure colours against a black background. We have
two different kind of viewing modes for the same image. Now, in this
case both are based on stereopsis, but each gives a different depth
impression. By free viewing, the brain locks automatically (if
previously learned) into the free viewing mode and decodes the stereo
pair independent of colours. By using ChromaDepth* glasses the brain
locks automatically into a forced spectral(colour) depth mode, not like
the ordinary stereoscopic mode. In fact ChromaDepth* is a
different(optimised) kind of stereoscopic depth decoding device. So far,
we have two options selected from the same image. With ChromaDepth*
glasses, we need only the 2D version of the image and right or left
makes no difference. Now what could be the possible result if we tried
to combine both decoding modes at the same time?

"The Face and Vase" concept?
The brain will try to solve contradicting input, but in this case it is
impossible to alter between perceptual states as in the classic Face and
Vase situation.(The need for an interpretation, since both option might
be possible)

Never ending oscillating loop mode?
With this option, the brain will run in oscillating mode as sometimes
experienced with anaglyph if we use strong red in the image. With
anaglyp glasses on(viewing an anaglyp image), the brain will try to
process the contradicting information from one eye perceived as red and
the other as no impression(black). Since the feedback system is never
able to get proper verified the confusing input, the experience will
result in oscillating(flashing like) red/black impression
mode(confirmed, not confirmed, confirmed...) and it's not very
comfortable one.

Now, what will happen if we fuse the stereogram as we try to view the
image with the ChromaDepth* glasses at the same time?  Will there be a
mixed solution or will one kind of stereoscopic impression suppress the
other to fade away? The answer will be evident.... by doing the
experiment!  Enjoy and try it out with and without glasses at:
  
http://www.pluto.dti.ne.jp/~rcn/Java/General/PFireWorks.html

Jan Gjessing
 
"Well we know where we're goin' 
But we don't know where we've been 
And we know what we're knowin'
But we can't say what we've seen......"
(Road to Nowhere, Talking Heads)
 
"Extend your spatial vision" (More to come... later on...)
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*ChromaDepth glasses 
(STD version? yes! and about US$ 2,- a pair), can be obtained from:
Cygnus Graphic P.O. Box 32461 Phoenix AZ 85064-2461 
Fax: 602-202-279-7658 Ask for their latest catalog of 3-D. 
__________


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