Re: 3D stereo panoramic Cirkut photography dilemas (fwd)

[crowell@xxxxxxxxxxxxxxxxx (Jim Crowell)]

At 12:35 PM 11/17/95, John Roberts wrote:
>
>>This made me think about an issue that I think was raised a long time ago.
>>If you consider a stereo image from a fixed pair of cameras that can cover
>>a 180 degree field, the effective camera separation drops to zero for
>>images entering the camera lense from the far left or far right (ie: +/- 90
>>degrees from on axis). So, the stereo effect diminishes for off-axis
>>images.
>
>
>What you say is true, but it also applies to human vision - when you shift
>your eyes to the side, the effective interocular is reduced, and therefore
>the degree of depth perception.

The disparities diminish, but I dont believe that the depth percept
diminishes.  A properly-working visual system would scale the disparities
by the viewing angle to re-create the actual depth present in the scene
(except when you're 90 degrees off-axis, where the information just ain't
there).  Otherwise the whole world would appear to distort as you rotated
your head.

-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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