Abnormal loitering behaviour, real-time detection by OpenMV

In key areas, those who truly pose a risk are often not the individuals “entering” but rather those “loitering.” Manual monitoring struggles to continuously assess whether behaviour is abnormal, and reviewing footage after an incident has occurred means missing the optimal response window. OpenMV enables the system to “observe behaviour,” not merely “view images.”

At locations such as residential community entrances and exits, school gates, factory premises entrances and exits, and park entrances and exits, prolonged loitering, repeated back-and-forth movement, or lingering in sensitive areas by individuals often indicates potential security risks—for example, reconnaissance activities, unauthorised entry, or suspicious surveillance. If such activities are not detected and addressed promptly, they may lead to subsequent security incidents.

Although traditional security systems can record video footage, they primarily rely on manual real-time monitoring or post-event playback of recordings. Manual surveillance is not only labor-intensive but also makes it difficult to promptly and accurately determine whether a behaviour is abnormal; by the time an issue is identified, the optimal intervention window is often already missed.

Based on SingTown’s OpenMV smart camera, the system enables continuous perception and analysis of personnel behaviour at the camera edge, achieving automatic identification and immediate response to abnormal loitering behaviour.

After the camera is securely installed, OpenMV continuously captures footage of the monitored area and performs human detection, target tracking, and trajectory recording at the edge device, enabling continuous observation of individuals entering the area.

By comprehensively analysing behavioural characteristics such as personnel dwell time, activity area, movement trajectory, and repeated paths, OpenMV can determine whether personnel exhibit loitering behaviour that significantly deviates from normal passage patterns and differentiate such behaviour from daily activity patterns to reduce false alarm rates.

When the relevant behavioural metrics reach the preset threshold, the system can immediately output identification results at the edge device, triggering local audio-visual alerts or integrating with security systems to enable rapid response and on-site intervention—cloud computing is not required at any stage.

By embedding behavioural analysis capabilities directly into the camera edge devices, OpenMV equips security systems with on-site intelligent perception capabilities characterised by low latency, low bandwidth consumption, and high stability—upgrading safety management from “passive video recording” to “proactive alerting.”