Re: 'shifting eyeballs'

[P3D Larry Berlin <lberlin@xxxxxxxxx>]

Hi Everyone,

I'm new to the Photo 3D group and have enjoyed reading several days worth of
messages. My special interest is stereograms which are really a form of
elaborate stereo pair images. I just had to jump in on the (relatively) age
old discussion of "shifting eyes" to see stereograms.

The instruction to look through the page is a very accurate and direct
description but one that most who haven't seen stereograms yet have trouble
indentifying with. Most have a stubborn habit of focusing sharply with both
eyes on whatever seems solid in front of their faces.

I've found that the easiest way to start someone seeing stereograms is to
take the stereogram to Kinko's or it's equivalent and have a transparent
copy made of the stereogram (usually just over $1.00 for B&W). Then you can
literally look straight through the center of the image to any suitable
target behind the transparency. The best is a sheet of white paper with a
black dot in the middle. Simply move the image closer to or farther away
from the paper until the eyes are automatically lined up with the correct
stereo information. Note that it will still take a few moments for the mind
to interpret the stereo information, so have some patience.

I recommend that process on my web pages (with B&W samples to use) which
feature (color) stereograms as background images for web pages. Recently I
noticed that at least one commercial book includes a transparent page with
sample images printed on it. I don't know why they didn't start using
transparencies for that purpose a long time ago. It beats the other methods
easily and is simpler than any other explanation method or process.

Larry Berlin
3D Webscapes
http://www.sonic.net/~lberlin/new/3dnscape.html


>> when looking at 3D photos [stereo pairs] or sirds [magic eye images]
>> you have to try to look through the paper, this is a difficult thing to
>> convince your mind to do... if they printed sirds on glass it would be much
>> easier for people.
>
>I've seen places selling sirds that have them framed under a sheet of glass.
>The (novice) viewer is instructed to look at his reflection in the glass
>initially and then shift his attention to the picture.
Larry Berlin

Email: lberlin@xxxxxxxxx
http://www.sonic.net/~lberlin/


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