What is Absence Detection?
Absence Detection is the surveillance system's ability to detect missing employees in the designated areas using automatic AI-based video analytics. This would allow the supervisors to respond to the situation immediately, thereby resolving the business impacts or security risks.

How Does It Work?
The system will be configured with two parameters - the minimum number of people and the duration of the time for the violation to become an alarm. For example, if there are two employees required to be at their stations in the view of the camera at all times and only 15 seconds of absence is allowed, then one person leaving the scene for more than 15 seconds would trigger an alarm immediately.

The automatic absence detection is very helpful for both business and security management.

The security guard leaving the post, or missing officers at the security checkpoints in the airports, would be a serious security risk. The automatic alert can help the supervisors handle the situation immediately.

Missing employees in the factory production line would interrupt the production flow. Missing employees at the check-out counters or at the reception desks would be bad for the business as the customers would have to wait and in some cases even leave without the purchase.

It is possible to use ACTi's Absence Detection cameras together with ACTi's ZNR-series NVR or with Windows-based NVR 3 servers. The VMS will receive the absence detection alerts from the cameras and handle the events by video pop-up, sound alert, sending an email alert and more.

Furthermore, some of the latest ZNR-series NVR servers have the built-in Absence Detection capability - it is possible to use a regular surveillance camera without built-in AI and still run the absence detection thanks to the NVR-side AI capabilities.
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