Development of Paper Currency Image Acquisition Equipment in Cash Register
Yuan Wei-q · Yibiao jishu yu chuanganqi · 2013
The currency notes number identification system is including currency image acquisition unit and image recognition unit.The highest speed of the current currency notes number identification system is 15 pieces per second,and the identification rate is hard to synchronize with the rate cash register which dispensing speed is 1 200 pieces per minutes.The main reason for that is acquisition for one cash costs much time,means that limited time was left for image recognition.For this problem,a high speed image acquisition method based on DSP and CPLD has been proposed and a currency notes number identification system based on cash register has been developed.The currency image acquisition system is installed in a kind of cash register which dispensing speed is 1200 pieces per minutes,its running result shows the whole paper currency image can be continuously collected and the time for collecting one is 26 ms,and the time for one note remain in the cash register is 50 ms,so it can reserved sufficient time to ensure the real-time property of the system.