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From: shep@datacube.UUCP
Newsgroups: net.graphics
Subject: Re: SIGGRAPH '85 review(chatty)
Message-ID: <6700024@datacube.UUCP>
Date: Thu, 1-Aug-85 12:21:00 EDT
Article-I.D.: datacube.6700024
Posted: Thu Aug  1 12:21:00 1985
Date-Received: Sat, 10-Aug-85 20:29:07 EDT
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Nf-From: datacube!shep    Aug  1 12:21:00 1985


	SIGGRAPH was interesting this year. My "fave rave" was Steve
Gabriel's paper on rotationaly invariant splines. His "physical proof"
of 720 degrees of rotation should have been videotaped. (was it?)

	Here is a question; more of a homework problem: The PIXAR demo
showed a "real-time" 2-D FFT on a 128 * 128 image. It looked more like
10 transforms per second, so let's say it took 100mS to do the transform.
The CHAP (channel processor) board on the wall had 4 29116's, each with
their own 16-bit multiplier. Assuming a 100nS cycle for the 29116,
and free to guess about the PIXAR's internals, how many CHAP boards
were in the system?

	ps: I don't know the answer. I really just want to hear people's
ideas on architectures for novel FFT techniques. The choice of decimating
in time or frequency is some help; but if we assume that the PIXAR has
some high speed -block- access to the image-store, that could be the clue.

	One last SIGGRAPH note. Did everyone attending see the ABEKAS A62
digital disk recorder? It would seem that you "shaded cone heads" would
need something like that to deposit your pictures into. Is this going
to replace the SONY 1" still-frame widget. why/why-not?

Shep Siegel                               ihnp4!datacube!shep
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