-- William C. Haga (wchaga@vela.acs.oakland.edu)
Being one who has used wide-eyed vision on chain link fences ever since I was a kid, I was able to see the images in SIRDS right away. But I've had difficulty explaining the technique to friends. Today I had the latest Games magazine with me at my parents house. Games is running another contest using SIRDS, so there are three in the latest issue. This time I thought of the reflection idea. So I opened mom's china cabinet, put the magazine against the glass in the door, and told mom to keep looking at her own reflection in the glass until the image appeared.
It took less than thirty seconds.
When she saw the 3d train engines, I was subjected to a squeal of delight that I hadn't heard from her for a long time. "EEK! IT'S COMING OUT AT ME! IS THIS EVER NEAT!". Dad tried for about a minute but gave up.
About an hour later, mom and I heard a shout. We went to the dining area, and there was dad with the magazine against the glass in the door. "Isn't that just the most amazing thing!", said he.
Later they were making jokes about teaching old dogs new tricks.
STW_DEMO.EXE: the full package will allow RDS creation
Approx US$40
N.E.Thing Enterprises
P.O. Box 1827
Cambridge, MA 02139, USA.
Config: DOS
STEREOLUSIONS: creater/render/print SIRDS
I/O Software, Inc.
Ph: (909/483-5700 800/800-7970), USA.
Config: WINDOWS/Windows NT
(From William Saito, 3/07/94)
KAI's POWER TOOLS: Photoshop add-on for SIS creation
Config: MAC
To see a stereogram you must converge your eyes in such a fashion that each eye is looking at the corresponding pixel/dot required to get the 3D effect.
If you are converging your eyes in front of the picture instead of behind the picture, you will see the apparent image inverted.
This is what you should be doing:
right left
(.) (.)
\ /
| |
\ /
| |
.....pixel..pixel......(actual picture/poster)
\ /
| |
\ /
| |
\/
|
XX (perceived position in 3D--behind the object)
You can see that the separation between the two pixels
decreases as the 3D object moves closer towards you
eyes...but if you are seeing a "depth-inverted" image, you are
probably doing this:
right left
(.) (.)
\ /
\ /
\ /
\ /
\/
XX (perceived position in 3D in front of the object)
/\
/ \
/ \
/ \
/ \
/ \
..pixel........ pixel......(actual picture/poster)
This is where your eyes converge before the object, and we can see
that the separation increases as the object moves closer to
your eyes. Thus when a method is made to be viewed a certain way, and
you do the opposite, you see an inverted image.
From: jolsen@nyx10.cs.du.edu (John Olsen)
Newsgroups: alt.3d
Subject: Call for stereograms
Date: 26 May 1994 22:16:33 -0600
A stereogram distributor has asked me to post the following info. Please
don't contact me about it. Call or write (snail mail) to him. Tell him
you saw my message on the Internet.
----
David Sterling, president of Sterling Crescent International, Inc. is
looking for commercial-grade stereograms to be included in books and as
postcards. He prefers groups of images to singles, and you must be the
original designer (owner of the copyright on the image).
Payment on accepted designs will be on a royalty basis. For an upcoming book deal, he is trying to get all images submitted in final form by the end of June. The postcard work is ongoing.
I'd suggest calling him once you have a list of titles together, and then working out how to get preview copies to him (disk, paper, fax...). He's been distributing stereogram materials for a long time (long for the stereogram business, anyway :^), so he's picky about high quality, good detail, and eye-catching patterns.
He is: