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From: brent%terra@Sun.COM (Brent Callaghan)
Newsgroups: comp.sys.mac
Subject: Re: 3-D Graphics Question
Message-ID: <34960@sun.uucp>
Date: Thu, 26-Nov-87 13:03:19 EST
Article-I.D.: sun.34960
Posted: Thu Nov 26 13:03:19 1987
Date-Received: Sun, 29-Nov-87 17:14:10 EST
References: <1259@saturn.ucsc.edu> <2329@tut.cis.ohio-state.edu>
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Lines: 26
Summary: Stereo helps.

In article <2329@tut.cis.ohio-state.edu>, sarrel@tut.cis.ohio-state.edu (Marc Sarrel) writes:
> Recognizing objects in a photograph and contructing a 3D model is
> something that the human mind does very well, but that computers are not
> able to do yet.  I'm sure that the U.S. government would love to be able
> to do this sort of thing witht their spy sattelites.  However, if they
> can, they ain't saying how.

I've seen some nice 3D renderings of terrain derived from
Landsat images.  I saw the first in a magazine - a color
image of some dry valleys in Antartica looking obliquely
down the valley.  The color was from the original
image.  I believe that the depth information was computed
from a stereo pair.

On a Nova program on TV a few weeks ago I saw a computer
generated movie of a tour of the LA basin.  It gave the
impression of a ride in a 1,000 mph helicopter.  Again, the
terrain model was Landsat computed from a Landsat image.

I have the impression that the amount of computer horsepower
needed to generate these images is well beyond what a Mac
can offer.

Made in New Zealand -->  Brent Callaghan  @ Sun Microsystems
			 uucp: sun!bcallaghan
			 phone: (415) 691 6188