CCTV Camera Pros Geovision 8.4 Multicam Digital Surveillance System - Manual (Page 209)

Video Analysis
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3.16 Crowd Detection
Crowd detection is used to generate an alert when a crowd of people gathers in a specified area and
exceeds the defined time threshold.
Note: This function is only available when an AVP dongle is used. Up to 16 cameras can be
configured for this application.
1. Click the Configure button (No. 14, Figure 1-2), click Advanced Video Analysis, and select
Crowd Detection Setting.
2. Select the desired camera(s) to be configured, and click Configure. This dialog box appears.
Figure 3-49
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. Select Ratio of Changes. When the selected ratio of changes in the defined alarm region is
detected, the alarm will be activated. The smaller the ratio of changes, the more sensitive the
system is for changes in the camera view.
6. Specify Tolerance Time of Alarm in seconds that allows a crowd to stay before an alarm
condition is activated.