By Patrick Sisson, The New York Times Company Jordan Fisher was troubled. Every variety of the Red Bull energy drink comes in a similar metallic can, and his company’s camera system, which tracks products that customers pick up in stores, was having trouble distinguishing them. This obstacle was one of many that his company, Standard AI, faced while retrofitting a Circle K convenience store in Tempe, Arizona, with computer vision software, which tracks every item that customers pick up so they can simply scan their app-enabled phone to pay as they leave, eliminating the checkout line.