If you figure it out, Vista Research near SF, CA would like to know about it.
What they have now is expensive, expensive, expensive, and difficult.

www.vrinc.com

Andy











Alan B Pearce <A.B.Pearce@RL.AC.UK> on 03/31/2000 03:42:51 AM

Please respond to pic microcontroller discussion list <PICLIST@MITVMA.MIT.EDU>








 To:      PICLIST@MITVMA.MIT.EDU

 cc:      (bcc: Andrew Kunz/TDI_NOTES)



 Subject: Re: [OT] people detector, cheap, low consume, and
          esay to build,              is that too much?








How about a CCTV camera. You could probably use a slow scan rate so your
hardware does not need to be blindingly fast to deal with video rates, and store
the background image of the unoccupied area. then detect when the image changes
from the stored background image. With luck you could probably use one camera to
detect several positions - e.g. people in front of show cases, or whatever you
had in mind.