User manual

85XX Series Network DVR User Manual……………………………………………………………………….V1.0
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4.4.2.6.8 Object Direction
Enable the object direction rule on the selected zone by checking the Direction Filter box in the properties
inspector. Adjust the direction and acceptance angle to suit the detection scenario. Objects that travel in the
configured direction (within the limits of the acceptance angle) through a zone or over a line trigger the rule and
raise an alarm.
Enable the object tailgating rule on the selected zone by checking the Object Tailgating box in the properties
inspector. Adjust the time threshold to set the minimum allowable time between successive object detections.
Object tailgating is defined as an object crossing a line or zone within a certain time after an object has already
crossed the line or zone. If an object crosses a line or zone, and another object crosses the same line or zone
within the specified time window, the Object Tailgating filter will be triggered.
In this example, Object 1 is about to cross a detection line. Another object (Object 2) is following closely behind.
The tailgating detection threshold is set to 5 seconds. That is, any object crossing the line within 5s of an object
having already crossed the line will trigger the Object Tailgating filter.
4.4.2.6.9 Object Tailgating