Re: Ortho and Hyperstereo

[P3D Sam Smith <3dhacker@xxxxxxxxxxxxx>]

At 01:16 PM 1/2/97 -0600, you wrote:
>>The classic 3-D Stereo definition of "Ortho" is that the viewed images,
>>taken at the interocular of the observer, will be presented at the apparent
>>size the observer would have experienced from the taking position.
>>Except for those folks who have the same IPD as the lens spacing of the
>>taking camera, the classic ideal is by definition unattainable.
>

Gee, I guess I'm one of the lucky ones, as it seems I'm pretty close to this
classic ideal. My lens separation is 62mm. My eye spacing is 62mm. The focal
length of my stereo camera lenses are 45mm. The focal length of my viewer
lenses are 45mm. 

Have I indeed attained 3d Nirvana ? I hope this at least makes John B. Proud !


>As I said, I like effective hyperstereos. One thing I do not like is 
>shooting ordinary scenes (for example, people is rooms, etc.) with
>twin SLRS with 2-3 times the interocular spacing.  These do not work
>for me and my viewing systems.  I remember the VM set from the TV
>show "Full House" (hey, I am a collector, for a good price I'll buy
>anything!) had many ordinary scenes looking too hyper.  I just checked
>"Blossom" (collector, remember?) and this is not too bad but still
>unnecessary hyperstereoized.  I suppose the VM photographer is using
>twin SLRs with increased separation?
>
>How about hypostereos?  There ortho is not a choice.  But there is a 
>choice regarding the amount of deviation built into them.


Well said George. I think one of the variables here is that most beginners
and indeed some more experienced users have not developed a keen eye for
recognizing the effects of a reduced/enlarged stereo base. It's like a jazz
enthusiast who can pick out a Freddie Hubbard solo off the radio by not even
knowing who the band is. It's a developed sense that can only come with time.

In reality, those who have developed an eye for this have a distinct
disadvantage, as slight deviations can be distracting. Those who don't see
the difference just get to enjoy the view.

Sam


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