On Wed, 4 Jun 2003, Richard Gillilan wrote:
>
> The fact that points on the object that are very close to the viewer or
> very far away appear double (and out of focus) is also exactly what
> happens with real vision. Here's an experiment to try:
>
True, but you're describing horizontal (distance between left and right
eye projections relative to the focal plane) parallax - vertical parallax
(difference in vertical height of two points between the two stereoscopic
images) is the subject at hand with scene rotations. If you want to make
the eyeball analogy, toe-in is similar to viewing things in double (i.e.
cross-eyed) vision.
>
> Sorry, I offer no fixes here.
>
Agreed, toe-in tends to work just fine (and its used extensively), but the
problem increases as the size of the field of view increases, to the
point where its too difficult to view.
On Wed, 4 Jun 2003, jparrish wrote:
>
> I believe this would only be true for perspective projections, not
> orthographic, since there is no real "eye" position in orthographic
> projections (which are more common in molecular diagrams). Of course,
> feel free to correct me if I am wrong :)
>
Yes, although the depth of the object can't be large relative to the focal
distance (I forget how much...).
Regards,
Tim F
--
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Tim Fenn
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Rosenstiel Basic Medical Sciences Research Center
Brandeis University, Mail Stop 029
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