User Manual

Video Analysis
3
2. From the Video Analysis drop-down list, select Crowd Detection, select the desired cameras, and
then click Setting. This dialog box appears.
Figure 3-50
3. Select a camera from the Camera Selection drop-down list.
4. By default the whole camera view is set to be the alarm region. Click the button to clear the
default setting. Click the
button to freely draw the alarm region. To cancel the previously
drawn area, click the
button.
5. To adjust the Crowd Detection sensitivity, move the Sensitivity slider. The higher the sensitivity
value, the more sensitive the system is to detecting crowds.
6. To define the minimum ratio of change (in the alarm region) for the alarm to be activated, move the
Ratio of Changes slider to set a value. The smaller the ratio of changes, the more sensitive the
system is to the changes in the camera view.
7. To define the minimum time that a crowd needs to stay for the alarm to be activated. Use the
Tolerance Time of Alarm slider to specify a value or type a number in the blank.
8. Optionally configure the following settings:
 Automatically disable alarm: Triggered alarms are automatically disabled after the specified
time (seconds). The default setting is 30 seconds.
 Automatically disable alarm when the crowd disperses: Triggered alarms are
immediately disabled when no crowds are detected.
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