11.11.1
Camera movement and scene changes
As a result of tampering, or more accidentally, after cleaning, a camera may no longer cover
the area designated for monitoring. The Tamper Detect function can detect camera position
changes and scene changes such as a blocked camera view, for example. It does so by
comparing the current image to one or more reference images that were captured and stored
earlier.
11.11.2
Enable Tamper Detect
Tamper Detect is disabled by default.
To enable Tamper Detect
● In the VCA Settings section, select Enable.
The Position Measurement settings are opened.
Important: If no reference images have been stored yet, a BLOCKED OR CHANGED SCENE
alarm displays in the Feedback View. Tamper Detect cannot find a match with the current
image. You will need to create one or more reference images first.
Tamper Detect enabled: No reference images found
11.11.3
Reference images
You can create up to 16 reference images. This enables you to store images captured in
different day/night situations and/or from multiple PTZ preset positions. When the camera
moves to a different preset Tamper Detect tries to match the new scene to the available
reference images.
11.11.3.1
Create a reference image
To create a reference image
1
In the VCA Settings section, click Configure Reference Images.
2
Open the Reference image list, and then select the image you want to create.
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