Digital Watchdog MegaPix DWC-MVT4WiA User Manual page 31

1. Enable object removal detection and then select the detection type.
Enable Left Detection: Alarms will be triggered if there are items left in the pre-
defined area.
Enable Item Missing Detection: Alarms will be triggered if there are items missing in
the pre-defined area.
2. Set the alarm holding time and alarm trigger options. The setup steps are the
same as motion detection. Please refer to motion detection chapter for details.
3. Click "Save" button to save the settings.
4. Set the alarm area of the object removal detection. Click the "Area" tab to go to the
interface as shown below.
Set the alarm area number and then enter the desired alarm area name. Up to 4
alarm areas can be added. Click the "Draw Area" button and then click around the
area where you want to set as the alarm area in the image (the alarm area should be
a closed area). Click the "Stop Draw" button to stop drawing. Click the "Clear" button
to delete the alarm area. Click the "Save" button to save the settings.
5. Set the schedule of the object removal detection. The setup steps of the schedule
are the same as the schedule recording setup (See Schedule Recording).
※ The configuration requirements of camera and surrounding areas
1. The range of the detection object should occupy from 1/50 to 1/3 of the entire image.
2. The detection time of objects in the camera shall be from 3 to 5 seconds.
3. The defined area cannot be covered frequently and continuously (like people and
traffic flow).
4. It is necessary for object removal detection that the drawn frame must be very close
to the margin of the object in enhancing the sensitivity and accuracy of the detection.
5. Object removal detection cannot determine the objects' ownership. For instance,
there is an unattended package in the station. Object removal detection can detect the
package itself but it cannot determine to whom it belongs to.
6. Try not to enable object removal detection when light changes greatly in the scene.
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