3-DVG

[P3D <KenDunkley@xxxxxxx>]

I am new to the photo-3d list,  these are my first comments.   I hope it =
 is
OK to comment on comments made two years ago (digest 0813, 0818, & 0821)
regarding the effectiveness of the 3-DVG viewing device and how it worked.
   I am the inventor  of  the 3-DVG visual process.  I  will attempt to
address the following three points:  WHAT IS IT?   HOW DOES IT WORK?  AND=
 HOW
YOU CAN GET YOUR HANDS ON A FREE DEMO UNIT TO TRY OUT?

WHAT IS IT: The 3-DVG is a patented and unique visual process capable of
converting any color picture in a magazine into a three-dimensional
stereoscopic display "comparable"  to that achieved using a View Master.
 That is the good news.    The bad new is that the visual process must be
learned, it is totally interactive (the viewer functions as a component i=
n an
optical feedback loop), and generally  25 %  of persons who try it cannot
detect the effect at all. =20

The 3-VG visual process may be implemented on three basic platforms.  The
advanced version consists of hollow binocular tubes with frames and varia=
ble
pinholes on opposing ends.  It is this model that feels like a View Maste=
r.
  The remaining two platforms are the initiation or training version , th=
at
uses two pinholes and folds to business card size, and the use of an
individual=92s fingers.  =20

An individual must first detect the 3-DVG effect. The rules of detection =
are
very strict and are unequivocal.   When you detect  3-DVG effect you will
know it.   The rules of detection are that the viewer  must respond in th=
e
affirmative to the   following questions: {1} Can you look all the way in=
to a
good scenic picture? That is, can you look "out to infinity" and {2} does=
 the
picture appear truly three-dimensional (i.e., stereoscopic)?   If you exa=
mine
a scenic picture containing trees, foliage, or flowers you should be able=
 to
distinguish the apparent difference in visual depths of small individual
elements of the picture such as leaves on a tree or flowers in a garden.
 Round objects should appear fully contoured in space. It should appear
unequivocally stereoscopic though not identical to images from normal ste=
reo
pairs.  Direct comparison can easily be made by free viewing a color
stereoscopic pair versus the 3-DVG viewing of one of the dual images.
Excess pinhole generated chromostereopsis is apparent at first because of=
 how
I initially instruct the viewer to move the pinholes.=20

Following  detection,  the image  will demonstrably improve as you learn =
to
control chromostereopsis and image linearity.   Look carefully, the 3-DVG
process does not tie apparent depth to color coding, as even I first thou=
ght
in 1985.

HOW  IT WORKS (the short version!) There are numerous 2-D to 3-D visual
effects noted in the literature.   Four well known one are (1) the Ames
effect (2) the pinhole effect (3) pinhole generated chromostereopsis and =
4)
illocal framing.  Please read my SPIE paper on the difference between the
Ames effect and pinhole generated chromostereopsis.   The advanced 3-DVG
works by adding  the  above four effects into a single 3-D visual effect =
that
appears truly stereoscopic in spite of limited actual stereopsis and a le=
ss
than ideal viewing angle.

HOW YOU CAN GET YOUR HANDS ON A FREE DEMO UNIT TO TRY  OUT?=20
Send me an e-mail with a mailing address. Give me a few days to get it to
you.   Please mail it back to me in about a month so other members can tr=
y
it.   =20

REFERENCES:=20
1.  John Dennis, "Bending Colors," Stereo World, Vol. 20, No.1, March/Apr=
il
1993, pp.34-  36;
2.  K. J. Dunkley, "A new 3-D from 2-D visual display process," SPIE Vol.
1915; Stereoscopic Displays and Applications IV(1993), pp. 132 - 140;
3.  Kenneth J. Dunkley, "The 3-DVG Workshop: How to use your fingers to t=
urn
any color magazine picture into 3-D,"   Stereo World, Nov/Dec 1994, pp.
30-33.





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