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Manual - Surveillance System, Security Cameras, and CCTV ...

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3.16 Crowd Detection<br />

Crowd detection is used to generate an alert when a crowd of people gathers in a specified area <strong>and</strong><br />

exceeds the defined time threshold.<br />

Note: This function is only available when an AVP dongle is used. Up to 16 cameras can be<br />

configured for this application.<br />

1. Click the Configure button (No. 14, Figure 1-2), click Advanced Video Analysis, <strong>and</strong> select<br />

Crowd Detection Setting.<br />

2. Select the desired camera(s) to be configured, <strong>and</strong> click Configure. This dialog box appears.<br />

Figure 3-49<br />

3. Select a camera from the Camera Selection drop-down list.<br />

4. By default the whole camera view is set to be the alarm region. Click the button to clear the<br />

default setting. Click the button to freely draw the alarm region. To cancel the previously<br />

drawn area, click the button.<br />

5. Select Ratio of Changes. When the selected ratio of changes in the defined alarm region is<br />

detected, the alarm will be activated. The smaller the ratio of changes, the more sensitive the<br />

system is for changes in the camera view.<br />

6. Specify Tolerance Time of Alarm in seconds that allows a crowd to stay before an alarm<br />

condition is activated.<br />

3<br />

Video Analysis<br />

193

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