A barcode: what is it?
A barcode is a tiny image of lines (bars) and spaces that is attached to retail store items, identity cards, and postal mail in order to uniquely identify a certain product number, person, or place. It is frequently written as two words, bar code.
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Numbers and other symbols are represented in the code by a series of vertical bars and spaces. A quiet zone, a start character, data characters (which may include an optional check character), a stop character, and another quiet zone make up a conventional barcode sign.
The operation of barcodes
All that is a barcode is an image. It needs to be decoded by a barcode reader or scanner in order to make sense. A laser beam that is sensitive to reflections from line and space thickness and variation is used by the reader...