Barcodes are often used for general merchandise scanning
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Barcode (barcode) is the width of a number of black bars and blanks, in accordance with certain coding rules, to express a set of information graphic identifiers
A common barcode is a pattern of parallel lines made up of black bars (referred to as bars) and white bars (referred to as blanks) of widely varying reflectivity.
Barcode can indicate the country of production, manufacturer, product name, date of production, book classification number, mail origin and destination, category, date and many other information.
Therefore, it is widely used in many fields such as commodity distribution, library management, postal management, banking system and so on.