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56 - User's Manual
time� It will trigger the alarm once the dwelling time of the object is longer than the given time�
■ Camera tampering detection: Select this option to detect camera tampering.
Detection region: Draw a detection region�
■ To draw a rectangle region, click on the rectangle button to entering the drawing mode� The button
will becomes and you can click and drag to draw a rectangle on the video area as the left diagram
below�
■ To draw a polygon region, click on the polygon button to entering the drawing mode� The button
will becomes and you and click several points on the video area to link a polygon region� Note that
the maximum number of points of the polynomial should be 10.
Note that you can only draw either a rectangle region or a polygon region� The buttons will turn to
which can not be congured.
You can click Delete to erase the detection region. When completed, select Enable this trigger. Click
Save to take effect and then click Close to quit this page�
The status of trigger will turn to “ON“ on the Video content analysis page as below�