Based on Microsoft's gaming sensor Kinect, Kintense analyses a person's body and picks out where the joints are to create a real-time 3D skeleton figure. An algorithm then recognises movements made by this model that indicate aggressive acts such as kicking, pushing, hitting and throwing.
In trials, some actions like kicking were recognised with 90 per cent accuracy, but other movements, like punching and throwing, were trickier to spot.
The system, designed by Shahriar Nirjon and colleagues at the University of Virginia, was created to warn medical staff if a patient is acting violently – but it could also be used in security cameras.
the system can upgraded so it can recognise verbal aggression, too.