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When checking out in supermarket, it is difficult to judge the speed of each checkout counters quickly facing many of them. As a consequence, the poor efficiency leads to a waste of time. The light boxes of cashier desks recognize the number of customers by the sensor at the queuing area. Then it will change the light colors to tell customers the number of checking out and project the number on ceiling, which makes people find the uncrowded cashier desks faster.
Dalian Minzu University
Dalian, China
Xuefei Liu
Di Fang
Desheng Si
Chengcheng Gu