help setting up preclusive zones

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Location: Santa Cruz, CA, USA

help setting up preclusive zones

Post by cTurtle98 » Tue Dec 26, 2017 9:13 am


I need help on how to setup preclusive zones to deal with the sun moving accross a room

i also need help how to setup preclusive zones for not activating when my cameras switch from color day mode to infared black and white mode, currently 90% of my events are caused by my cameras changing modes


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Joined: Fri Nov 10, 2017 6:05 pm

Re: help setting up preclusive zones

Post by montagdude » Tue Dec 26, 2017 1:58 pm

The trick is to make them small, sensitive, and place them in areas where a real alarm would not occur, like high on the wall where lighting changes occur or a ceiling that gets illuminated by the IR light. Use the Extend Alarm Count setting to disable alarms for a couple seconds after the preclusive zone is activated. For example, here are the settings I'm using for one of mine:

Zone area: 0.14% of frame
Units: Percent
Alarm check method: AlarmedPixels
Min/Max Pixel threshold: 10, 0
Min/Max Alarmed Area: 10, 0
Overload frame ignore count: 0
Extend alarm frame count: 4

That is the small zone above the hallway in the image. I also have one on the ceiling which takes care of the IR light coming on and off. (Though now that I look at it, it probably doesn't need to be that big.) I rarely get false alarms due to lighting changes with this setup.
zones1.png (537.21 KiB) Viewed 1390 times

Posts: 196
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Re: help setting up preclusive zones

Post by SkippyDo » Tue Jan 02, 2018 12:11 am

montagdude, thanks for that reply! I've now implemented some preclusive zones and hoping they help with changes in general lighting conditions. Now if I could only figure out how to deal with alarms from rain coming off a roof!

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