Article View: comp.sys.transputer
Article #702video digitising, neural nets
From: Denis Brown
Date: Fri, 11 Sep 1992 00:32
Date: Fri, 11 Sep 1992 00:32
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2310 bytes
I have an interest in digitising stereoscopic video images for use in human movement studies (e.g. limb movement dynamics) and, unrelatedly at present, neural networks for various modelling tasks. From the data and experience to hand it seems that transputers offer the power and expansion prospects which will be required (especially in the neural nets). Accordingly I have budgeted for something like the Transtech TTG-F frame grabber and a 10-TRAM host card for my baseline environment (networked PCs). The frame grabber takes up 4 TRAM slots, so I expect to have a reasonable expansion path before having to get more host cards. I'm experienced in C, so have opted for this as the lingua-franca in the form of 3L's Parallel C. On the video (movement) side, I'd be interested in deltas (subtracting successive frames, effectively), with concentration on maybe 6% of the full scanned area. Any comments from anyone who's done/doing/given-up- on something along these lines ?? Granted, it's not the sort of soft- ware you'd knock up haphazardly before morning tea break one day, but according to one of our ex Prime Minister's, "Life wasn't meant to be easy!". BTW, I don't need display of real-time (or indeed ANY) video, just a bunch of numbers saying "this point moved xx,yy,zz units since the last capture time". Using multiplexed video sources into 1 grabber and CCIR TV specs, this means a timing resolution of 40 millisecs, more than fast enough for what I have in mind. Another way of going would be a workstation (SUN, DEC, etc) with a frame grabber card. There'd most likely be heaps of nearly-written code out there, but the comparative "isolation" of the processing horse- power from the grabber hardware weighs up in favour of the txputers, I think. Also I have a desire to implement the n/nets (later on) in a parallel environment. Comments, etc appreciated. Cheers, Denis
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Path: arc1-ca.pugleaf.net!sparky!uunet!munnari.oz.au!uniwa!uniwa!nfm From: udptech@uniwa.uwa.edu.au (Denis Brown) Newsgroups: comp.sys.transputer Subject: video digitising, neural nets Date: 11 Sep 1992 08:32:51 +0800 Organization: The University of Westrn Australia Lines: 36 Message-ID: <18opfjINNc1n@uniwa.uwa.edu.au> NNTP-Posting-Host: uniwa.uwa.edu.au X-Newsreader: Tin 1.1 PL5