At 12:55 PM 15/03/2013, you wrote:
>Hi Art:
>
>Video surveillance cameras have an alarm function where you define a=20
>box or boxes and if the scene changes inside them
>alarm contacts are closed.
>No alarm if it's just the normal day/night light level that's=20
>changing.  Many of these cameras include a number of IR
>LEDs for "night vision".
>
>Some of these cameras come as modules that are very small.
>http://polarisusa.com/hidden-and-covert-cameras


I have Cisco IP camera set up to monitor my office when I'm abroad,
(NTTAWWT) and it false triggers sometimes on sunny days when clouds
combined with high winds cause a rapid change in brightness.

--sp =20

--=20
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