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Re: Single lens 3D questions


  • From: P3D William Carter <wc@xxxxxxxxxxxxxxxxxxx>
  • Subject: Re: Single lens 3D questions
  • Date: Thu, 12 Sep 1996 21:03:28 -0700

John B hypothecates:
>The way this applies to Q-DOS (forgive me, WJC) is that the
>separation of the viewpoints is low so the parallax is low.

Et tu Bercovitz? 
Do you still have that/those stereo pair/s I gave you?
If yes, then the next time you set up your projector, would you 
critically examine them for any semblance of card boarding? It is my 
position that card boarding is only a dual/multi lens artifact. Let me 
know what you think?! 

Q-DOS does several things which corrupt it's SL3-D advantages. One of 
the things it does is space the the red/cyan filters. In doing so it 
depth encodes only the edges of an object point. This may cause the 
object point, or an amassed group of object points, to loose the main 
element our stereo sensitive brain requires to stereoptically perceive 
depth... self similarity. 

Two photos taken from two different positions, and directed toward the 
same subject, are not identical. One photo will contain elements which 
the other can not possibly see. The one photographs the shadow of the 
other. Any and all of these dissimilar, non-corresponding points are 
without depth information. A nose that is seen in a stereo pair, a pair 
which hides any portion of the face behind it, will be seen as a card 
boarded cartoon of the real thing. 

By only encoding the edge periphery of the aperture, Q-DOS has managed 
to accentuate a dual lens type non-correspondence, rather than to 
simply record similar points at different degrees of parallax.


-- 
                wc@xxxxxxxxxxxx
    37deg 39.09'N x 122deg 29.56'W x 90'MLLW





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