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

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3.11 Scene Change Detection<br />

The Scene Change Detection can detect when a camera has been tampered physically. This feature<br />

can generate an alert whenever someone or something has covered the lens of the camera, or when<br />

the camera has been moved, or when it is out of focus.<br />

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

Change Detection Setting. The Scene Change Detection Setup dialog box appears.<br />

2. Select the desired cameras to be configured, <strong>and</strong> then click the Configure tab. This dialog box<br />

appears.<br />

Figure 3-39 Scene Change Detection Setup<br />

� Camera: Select the camera to be configured.<br />

� Mask region: Masks off the areas where motion will be ignored.<br />

� Focus change: Generates an alert when the camera is out of focus.<br />

� View change: Generates an alert when the camera has been moved, or the lens of the<br />

camera has been covered.<br />

� Sensitivity: Adjusts detection sensitivity. The default value is 3.<br />

� Delay Time(s): Sets the duration of a scene change before an alarm condition is triggered.<br />

3<br />

Video Analysis<br />

183

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