Drones Detecting Physical Behavior

Another case of complex pattern recognition.  In live video.  Here the drone is classifying a set of human behaviors and them classify them as a 'brawl'.  In English a violent, multi person fight.  Could be with or without weapons.  Could then be integrated further into a model of a crowd.  And identify individuals.    No indication that the drone would do anything other than alert the authorities.    Will see how accurate this is, and how its integration into police decision making is envisioned.

AI Drone Learns to Detect Brawls      in IEEE Spectrum  by Jeremy Hsu

Researchers at the University of Cambridge in the U.K., working with colleagues at the Indian Institute of Science, Bangalore and India's National Institute of Technology, Warangal, have used deep learning to develop a drone surveillance system that automatically detects small groups of people fighting each other. The system uses computer vision software that runs in real time to detect violent individuals, says the University of Cambridge's Amarjot Singh. The researchers trained deep learning algorithms to recognize violent actions by identifying body and limb poses in staged video footage of interns mimicking violence. Singh replaced some of the neural network layers at the front-end with fixed parameters, and used supervised learning toward the back-end, exchanging some of the deep learning process with human engineering input. This allowed the resulting ScatterNet Hybrid Deep Learning (SHDL) network to learn more quickly with less data and less available computing power. The researchers are securing permission from Indian officials to test the system at two upcoming music festivals, and Singh is working to incorporate crowd modeling into the deep learning models.  ... "