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Researchers working with Orwell and his colleague Sergio Velastin have developed software that allows for the automatic detection of objects or events in video footage, creating continuity between cameras that lets the police track someone's movements. The technology also makes it possible to search video for specific actions, such as people running or cars pulling over to a curb. "It can search content-based metadata such as 'guy in the red tracksuit,' to see if there is a better shot that lets his face be compared with those in online databases," explains Orwell.