MattSparkes writes "Smart surveillance systems could identify crimes as they take place, if a computer vision system developed at the University of Texas goes into production. The system is capable of classifying behaviour as friendly or violent. In the past there have been attempts to spot unusual behaviour, but this required subsequent user classification. These new systems may keep us more secure, but is it worth sacrificing our privacy for? And will we see false positives, where police cars screech to a halt beside hugging couples?"