P3D Re: STEREO SPECS system

[Larry Berlin <lberlin@xxxxxxxxx>]

>Date: Thu, 4 Dec 1997
>John W Roberts  writes:
>.........................
>
>>Date: Wed, 3 Dec 1997 09:27:39 -0700
>>From: MarkKernes@xxxxxxx
>>Subject: P3D Re:  PHOTO-3D digest 2431
>
>>>The STEREO SPECS system actually works by artificially mimicing the way
>>>the eyes normally perceive real-life, three dimensional objects. Therefore,
>>>as mentioned above, any type of video screen, with no special picture
>>>processing, can be viewed in full-color three dimensional format (or normal
>>>two dimensional format without the aid of the system).>>
>
>>Is there ANY way to read this claim other than a Pulfrich-effect system? 

>
>A system which shifts the apparent position of the left and/or right views
>to move the apparent position of entire image closer or further than the
>actual distance (without adding depth *within* the image) would satisfy
>most of the description, if "stereoscopic 3D" is not interpreted in the
>strictly traditional manner. Such a system would *not* be Pulfrich. [Note]
>

****  This method is what I assumed to be the case when I read the web page.
I didn't think it was Pulfrich, though I really wonder about one comment on
their website where it gives some really strange comment about *needing to
determine which eye is the dominant one*. This led me to think that they
would reverse the signal to the glasses at will and not adversely affect the
image other than to help someone with a different dominant eye. This
statement alone tells me that the persons writing the page don't have a good
understanding AT ALL of stereoscopic viewing.

If their system provides any legitimate form of 3D, it could be captured as
a stereo image and examples presented as pairs on the website. If they are
merely projecting the 2D image in front of the screen or behind it, the
photo would reveal that fact. If it was Pulfrich, you would have true stereo
if the action existed to create a stereo disparate pair of views.

Any form of true Stereo does not depend on a *stronger* eye in such a way
that reversal of the image can compensate. For true stereo that would create
a Pseudoscopic image, no matter the strength of the eyes. In this case I
interpret their description to mean changing things based on whether one
likes the effect of the still flat image being projected in front of the
screen or behind the screen. Either way it remains flat. The term
pseudoscopic would seem more appropriate to this kind of scam than to the
actual definition of simple reversed depth clues. I guess they didn't have
as many 3D scams back when the terminology was determined.

Larry Berlin

Email: lberlin@xxxxxxxxx
http://www.sonic.net/~lberlin/
http://3dzine.simplenet.com/


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