Re 3DTV

[P3D Larry Berlin <lberlin@xxxxxxxxx>]

>Date: Fri, 3 Jan 1997 14:50:33 +0000
>From: P3D  Marcus Warrington  <writes:
..........................................snip.........
>I beg to differ... the original article ststed that..
>
>> Motion-Based 3D Effect
>> The 3D illusion relies entirely on movement within the picture.  If
>> you pause your VCR tape or a video game, the effect is completely lost
>> leaving you with a flat 2D image.  Once the picture resumes moving
>> whether its an object, character or background the 3D effect comes
>> back.
>
>Although I recognise that the shutter glasses technology is nothing new (I
have 
>a pair of Chinon Cybershades myself). The article implies that any NON 3D
video 
>input is converted into a 3D image if it has movement.

***************  The original article is not easy to understand. It mixes
things up without explaining why. The glasses used are undoubtedly the same
as the LCD glasses we know about. The 3D effect relating to motion is not
Pulfrich, though the description sounds that way. Apparently they use
relative motion to determine depth relationships of layers in the 2d image
on the fly and create a left and right image from this information, then
display it in alternate fields for the glasses. There is a web page about
this method (from before it was this advanced...) somewhere deep in my
notes. The mention of stopping the tape and having a 2D image is kind of
misleading to those who don't know much about stereo and LCD glasses. Of
course it will be 2D when viewing only half the information! Whatever the
source! 

As remarkable as this technology is, the 3D effect will *go away* whenever
there is insufficient motion to determine usable depth relationships. This
is a realtively incomplete technique, but useful if you want a little 3D in
your regular 2D-material viewing pleasure. Typical TV talk shows will be
rather flat, but other shows have lots of motion...and the titles...

Sorry to hear about the company car, but what's important is that you made
it back to P3D! The company can get another car...  ; -/

Larry Berlin

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


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