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Blind people are difficult distinguish the currency, such as US dollar are all the same size, it is not good enough for blind to identification, many blind people was deceived. In the future, money can combined with the RFID, blind have a wallet like currency reader (RFID reader), let the blind easy to know the currency type by use listening,it can help blind to use currency and also convenient to help common people to check the money in wallet and control income and cost, it will be very useful.
National Cheng Kung University
I Jui Lee