Digital Watchdog MEGApix DWC-MVT4Wi28 User Manual page 32

A<-B: The alarm will be triggered when the intruder crosses over the alarm line from B
to A.
Click the "Draw" button and then drag the mouse to draw an alarm line in the image.
Click the "Stop" button to stop drawing. Click the "Clear" button to delete the cordons.
Click the "Save" button to save the settings.
5. Set the schedule of the line crossing alarm. The setup steps of the schedule are the
same as the schedule recording setup (See
※ Configuration of camera and surrounding area
1. Auto-focusing function should not be enabled for line crossing detection.
2. Avoid the scenes with many trees or the scenes with various light changes (like
many flashing headlights). The ambient brightness of the scenes shouldn't be too low.
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.
8. Please contact us for more detailed application scenarios.
Here we take some improper application scenarios for instance.
Schedule Recording).
32
There are so many
trees near the road
and cars running on
the road, which make
the scene too complex
to detect the crossing
objects.