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Re: [photo-3d] Hyperstereo from airliner - frame rate?

  • From: "John A. Rupkalvis" <stereoscope@xxxxxxxxxxxxx>
  • Subject: Re: [photo-3d] Hyperstereo from airliner - frame rate?
  • Date: Tue, 9 Jan 2001 10:35:26 -0800

----- Original Message -----
From: "Dr. George A. Themelis" <drt-3d@xxxxxxx>
To: <photo-3d@xxxxxxxxxxx>
Sent: Tuesday, January 09, 2001 9:49 AM
Subject: Re: [photo-3d] Hyperstereo from airliner - frame rate?


> >To get any parallax at all, it was necessary to shoot forward for the
first
> >exposure, and then wait several minutes (!), shooting toward the back for
> >the second.
>
> Sounds like you were riding a very slow-moving plane! :)
>
> George
>
>

Not at all.  From a normal altitude and speed (say 20,000ft. @ 500 m.p.h.)
it takes a while for the motion of the plane to make a noticeable difference
relative to the horizon, which I believe is something over 8 or 10 miles
away at that height (you can do the math).

JR