Mailinglist Archives:
Infrared
Panorama
Photo-3D
Tech-3D
Sell-3D
MF3D

Notice
This mailinglist archive is frozen since May 2001, i.e. it will stay online but will not be updated.
<-- Date Index --> <-- Thread Index --> [Author Index]

Re: Hyper


  • From: john bercovitz <bercov@xxxxxxxxxxx>
  • Subject: Re: Hyper
  • Date: Sat, 4 Jul 1998 16:41:44 -0700

> which were taken in stereo?.

Sure is.

Stephen gave a good explanation.  For some few warped people, 
laying a few numbers on the situation may help.  The natural 
stereobase is the distance between your eyes, which for most 
people is somewhere in the span of 55 to 70 mm.  If you use 
double the natural stereobase when taking your pictures, all 
three dimensions of the reconstructed view are cut in half.  
(The reconstructed view is what you see in your stereo viewer.)  
Similarly, if you use ten times the natural stereobase (say 650 
mm), all dimensions in the scene will be made smaller by a factor 
of ten.  The good thing about this is that if your acute depth 
sensitivity in real life extends to 10 meters, then with a 10X 
stereobase, you will have the same degree of sensitivity at 100 
meters (1/10th of which is your normal limit of, say, 10 meters.).

John B