Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!wasatch!cs.utexas.edu!uunet!seismo!esosun!cogen!celerity!celit!hutch
From: hutch@fps.com (Jim Hutchison)
Newsgroups: comp.graphics
Subject: Re: What's a hologram?
Keywords: hologram
Message-ID: <590@celit.com>
Date: 28 Aug 89 21:24:18 GMT
References: <1311@blackbird.afit.af.mil>
Sender: daemon@fps.com
Reply-To: hutch@fps.com (Jim Hutchison)
Organization: FPS Computing
Lines: 17

In article <1311@blackbird.afit.af.mil> tmouser@blackbird.afit.af.mil (Tommy A. Mouser) writes:
>I've calculated it would take a Sun 4 about 280 days to make this
>calculation.  A Cray2 about 6 days.
How did you figure this out (A Cray2-?)?  Generating 3-D imagery does not
always take 280 days on a Sun 4, what is it that makes this problem so unusual.

>All of these numbers change drastically if you choose to convert
>the problem such that Fourier analysis is applicable.  But, this
>doesn't seem to work too well for 3-D holography.

3-D holography would seem very suited to Fourier analysis, if for nothing
else than to compress the data.  On top of that, you could conveniently
combine data by merging series.  You could build 3-D molecular models without
recomputing all the parts, just rotate individual pieces.

/*    Jim Hutchison   		{dcdwest,ucbvax}!ucsd!celerity!hutch  */
/*    Disclaimer:  I am not an official spokesman for FPS computing   */