To determine the best camera to use when tracking a target or displaying an intrusion alarm, RSA Surveillance relies on a set of rules called the camera selection algorithm.
The system selects the best camera based on the following algorithm:
- The camera must be eligible.
This means that the camera is online and have a FoV configured on the map where the target is displayed. Depending on the context, the cameras being considered might be limited to the ones assigned to an RSA zone.
- The closest camera that has the target in its FoV is selected. The system takes into account the walls configured on the map that can block the cameras' FoV.
- If the selected camera is a PTZ camera, the system does the following:
- Pans the camera so the target is centered in the camera's FoV.
- Adjusts the zoom level to follow the Auto-zoom setting configured for the RSA Surveillance plugin.
If someone with a user level higher than that of the RSA server user has locked the PTZ, the system uses the next best camera it can find.
- If no eligible cameras can see the target, the system falls back on the camera list
configured for the RSA zone.
- If it is for target tracking, the system displays the first camera in the list.
- If it is for alarm display, the system displays all the cameras in the list in a circular fashion.