Camera Tampering
The Camera Tampering video analytic is a video analytic that can detect when a camera's field of view is obstructed.
The Camera Tampering video analytic can be enabled on a camera that is running another video analytic to ensure continuous operation of the camera. It can detect when the direction of the camera changes, when the camera is blocked, or when the lighting in the scene changes.
When the Camera Tampering video analytic detects a significant change to the scene (approximately 25% of the scene changes), it uses a previous frame as a reference and compares the subsequent frames to that reference frame. If the change persists for the minimum tampering time threshold, the Camera Tampering video analytic concludes that the camera is obstructed. For example, the Camera Tampering video analytic can detect when the lens of a camera is covered in spray paint, when a camera is moved, when a large object is place in front of a camera, or when the lights in the scene are turned off.