Imagine a summer day: you are thirsty and want to get a soda, you approach a device at the corner of the corridor, the device looks at you through its camera and welcomes you (!), you press a button on the touch-screen and get your soda. No coins, no cards, even no need to reach your wallet. Well, this is not a science fiction, the device is now a reality thanks to a group of graduate students at University of California San Diago and also thanks to their prof pressing for a course project... :)
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