Re: Computer Compositing

[T3D Bill Stratemeyer <wwstrat@xxxxxxxx>]

john bercovitz wrote:
> I'm a little concerned about moving an object, which has its own
> parallax associated with it, to a different depth.  An object's
> own associated or shall we say "internal" parallax is a function
> of its distance from the observer so I think if you change the
> distance of the object, some type of distortion must result.

  I just finished a test of modifying deviation only for 
objects in a stereo pair. 

  This is what I did.  First I rendered a ray traced stereo
pair for cross eyed viewing.  In the left image the near
object a dolphin has .25" deviation difference as compared 
to the same object in the right image.  (5"x4" image size) 
  Next I masked the left images near object and cut & repasted 
it to a new position with .0" deviation.  Then I cloned in 
missing background information (Photoshop allows you to clone
from one image to another).
  When viewing and comparing the 2 sets of stereo pairs the
only difference appears to be the depth of the dolphin with no 
distortion (Bulge or stretch) and the object size seems to be
the same as in the unmodified pair.
  I would have expected this to have made the dolphin a hyper view 
object (smaller)?  Maybe I need to redo this with an exaggerated
amount of parallax in the near object to see any distortion or
change of apparent object size?
  Would the results be different when seen in a viewer or in
projection?

Thanks
Bill Strat..


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