Re: Nimslo Prints vs Slides

[crowell@xxxxxxxxxxxxxxxxx (Jim Crowell)]

At 6:45 PM 2/29/96, John Bercovitz wrote:
>> Yes, and the same thing can happen in mono!  And for basically
>> the same reason.  When you're watching a movie & the camera
>> moves, there's an "ortho seat" where the motions on the screen
>> re-create the motions in the world exactly (assuming the camera
>> lens acts ike a planar projection, anyway).
>
>It's a funny thing but I did the geometry on perspective and it
>matches exactly the geometry for the ortho view.  That is, if
>you don't sit at the ortho seat (which is called the center of
>perspective in the mono world) you get the same space distortions
>(same in sense and magnitude) whether it's a mono view or a stereo
>view; the distortions match perfectly.
>

In the case of motion the similarity is paritcularly obvious, in
that you can describe a motion of the camera (or of your eye as
you walk around) as a sequence of viewpoints that are separated
in time as well as space.  Alternatively, you can describe
stereo viewing as the motion of a single eye from one side of
your nose to the other at infinite speed!  Kinda worrisome,
isn't it?  :-)

Scientifically, this means that as soon as anyone comes up with
a new idea for an experiment in one domain, someone else will
try & do it in the other...

-Jim C.


------------------------------------------------
Jim Crowell
U.C. Berkeley School of Optometry
360 Minor Hall, Berkeley, CA 94720
(510) 642-7679
jim@xxxxxxxxxxxxxxxxx



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