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- Xref: sparky sci.electronics:18864 comp.robotics:2318
- Path: sparky!uunet!ukma!fmsrl7!destroyer!cs.ubc.ca!weiss.cs.ubc.ca!not-for-mail
- From: harrison@cs.ubc.ca (James Harrison)
- Newsgroups: sci.electronics,comp.robotics
- Subject: `Passive' tracking of participants in a free space
- Date: 13 Nov 1992 14:16:56 -0800
- Organization: Computer Science, University of B.C., Vancouver, B.C., Canada
- Lines: 42
- Distribution: world
- Message-ID: <1e19goINNj4a@weiss.cs.ubc.ca>
- NNTP-Posting-Host: weiss.cs.ubc.ca
-
- We are designing an interactive-participant oriented exhibit that will
- present the illusion of an audio and visual space to a participant.
-
- To present these illusions we will be using spatially distributed
- audio and visual sources (speakers and monitors) whose position,
- orientation, etc will be well known and defined.
-
- Knowing the position of the participant we will drive the audio and
- visual sources to present the illusion of objects (invisible) through
- the audio channels and the illusion of windows into a virtual-world
- with the monitors.
-
- The problem is in aquiring and tracking the position of the
- participant. We would eventually like to move to a system which did
- not require the use of a active source carried by the participant. A
- passive reflector would be acceptable if it's cost was low enough, as
- we may want to give the objects away as souvenirs.
-
- The resolution of the tracker should be below 10 centimeters, and have
- an update rate of at least 10/sec. The system should be robust in the
- presence of acoustically hard environments (echos or noise). Be
- useful in a large room (15m by 15m by 3m at least). Not require
- extensive installation or calibration (beyond that which we will have
- to do for the audio and visual sources). And not require high
- computational costs or special hardware (cheap, uniform, replaceable).
-
- We're open to solutions using passive or active means, but we'd like
- to limit the cost of the hardware/devices that the participant might
- walk out of the door with.
-
- I know that it seems like we're asking for a lot. But we're looking
- for suggestions and solutions that might require refinement.
-
- If you have any suggestions, we'd appreciate hearing them.
-
- Thanks in advance.
-
- James Harrison
-
- --
- -------------------------------------------------------------------------------
- James Harrison@cs.ubc.ca `RPCing as fast as the network will let me.'
-