Path: utzoo!attcan!uunet!van-bc!ubc-cs!alberta!cdshaw
From: cdshaw@cs.UAlberta.CA (Chris Shaw)
Newsgroups: comp.graphics
Subject: Re: rotoscoping
Message-ID: <1990Oct25.013616.21961@cs.UAlberta.CA>
Date: 25 Oct 90 01:36:16 GMT
References: <13485@sdcc6.ucsd.edu> <1990Oct23.005649.7114@batcomputer.tn.cornell.edu>
Sender: news@cs.UAlberta.CA (News Administrator)
Organization: University of Alberta, Edmonton, Canada
Lines: 23

In article andyrose@batcomputer.tn.cornell.edu (Andy Rose) writes:
>Rotoscoping means (in video production) editing frames of live action
>on a frame by frame basis to add animation.
>An example: Take 15 seconds of live action of Peggy Fleming skating.
>
>Andrew Newkirk Rose '91 Department of Visualization CNSF/Theory Center

Another approach is to take some live action, digitize the frame-by-frame
positions of the limbs of the actor, and use this 2D data to animate a
computer-rendered character. If multiple cameras are used to simultaneously
film the actor's motion, you can get 3D limb position data and can render 3D
synthetic characters. The advantage is that the motion is realistic--because
it's real motion. The disadvantage is that it's "canned". That is, once the
actor goes home, all you've got is the recorded motion. If you want more, do
another film shoot.

The "sexy robot" can commercial that ran during a Super Bowl in the mid 80's
is a classic example. The picture was synthetic (a chrome-plated woman), but
the motion was supplied by an actress.
--
Chris Shaw     University of Alberta
cdshaw@cs.UAlberta.ca           Now with new, minty Internet flavour!
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