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Shelf date is the important basis for people to determine whether the food can be eaten, so the date of the shelf life for food packaging is very important. And now the average date of the date of the ordinary font is very small, for the elderly to find the date is not easy to date. So I designed a by scanning the bar code can identify food information magnifier, handle this magnifying glass button, when the old man put a magnifying glass on the bar code on the press the button, when the expired food, enlarged mirror frame will turn red, mirror will display expired fo date.
Ningbo Institute of Technology, Zhejiang University