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From: goldman@umn-cs.UUCP (Matthew D. Goldman )
Newsgroups: net.tv.drwho
Subject: Re: Visual Effects in Credits
Message-ID: <813@umn-cs.UUCP>
Date: Mon, 30-Sep-85 12:06:53 EDT
Article-I.D.: umn-cs.813
Posted: Mon Sep 30 12:06:53 1985
Date-Received: Thu, 3-Oct-85 03:52:44 EDT
References: <5162@allegra.UUCP>
Reply-To: goldman@umn-cs.UUCP (Matthew D. Goldman )
Organization: Demolitions Training Corporation
Lines: 28

In article <5162@allegra.UUCP> don@allegra.UUCP (Don Mitchell) writes:
>Does anyone know how the visual effects in the Dr. Who opening and
>closing credits were done?  The early shows (Hartnell to middle
>Pertwee) show a wavy pattern which looks like video feedback (what you
>get if you point the camera into the monitor).  The psychedelic-tunnel
>effect at the end of more recent shows is nice.  I have no guesses as
>to how it was done.


As I understand it, the tunnel effect is achieved very easily by changing
the way the monitor is being fed the signel.  A normal view is created by
feeding the moniter a view line by line of pixals such that the image is 
formed from left to right.  The tunnel view feeds in a circular motion 
from the center.


-- 
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				Matthew Goldman
				Computer Science Department
				University of Minnesota
				...ihnp4!umn-cs!goldman
				...stolaf!umn-cs!goldman

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