You can use the Object detection scenario to detect objects that are left in or removed from a scene.
This scenario is designed for monitoring changes in an indoor scene, such as small objects like luggage being left in the area. The objects to be detected should meet the size requirements described in the recommended camera configuration for object detection analytics.
This scenario analyzes foreground motion when analyzing scenes. Only objects that are detected as remaining still for the configured duration in the defined area foreground can trigger alerts.
The following image shows a configuration for an Object detection scenario: