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42
3. Cameras should be mounted at a height of 2.8 meters or above.
4. Keep the mounting angle of the camera at about 45°.
5. The detected objects should not be less than 1% of the entire image and the largest sizes
of the detected objects should not be more than 1/8 of the entire image.
6. Make sure cameras can view objects for at least 2 seconds in the detected area for
accurate detection.
7. Adequate light and clear scenery are crucial for line crossing detection.
5.4.3 Region Intrusion
Intrusion: Alarms will be triggered if the target intrudes into the pre-defined areas. This
function can be applicable to important supervision places, danger areas and prohibited areas,
like military administrative zones, high danger areas, no man’s areas, etc.
Go to Config→Event→Region Intrusion interface as shown below.
1. Enable intrusion detection and select the snapshot type and the detection target.
2. Set the alarm holding time.
3. Set alarm trigger options. The setup steps are the same as fire detection. Please refer to
Fire Detection chapter for details.
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