Update definezone.rst

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Andrew Bauer 2018-12-28 09:49:05 -06:00 committed by GitHub
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@ -104,6 +104,9 @@ Overload Frame Ignore Count
* Number of Blobs > Max Blobs
The idea is that after a change like a light going on that is considered too big to count as an alarm, it could take a couple of frames for things to settle down again.
Extend Alarm Frame Count
This field applies to Preclusive Zones only. Placing a value in this field holds the Preclusive zone active for the specified number of frames after the initial triggering event. This is useful in cases where a sudden change in light level triggers the Preclusive zone, but the zone needs to be held active for a few frames as the camera itself adjusts to that change in light level.
Other information
-----------------
Refer to `this <http://www.zoneminder.com/wiki/index.php/Understanding_ZoneMinder%27s_Zoning_system_for_Dummies>`__ user contributed Zone guide for additional information will illustrations if you are new to zones and need more help.