Bar code, also known as barcode or bar code, is a type of symbol code that is widely used to express information, including letters, numbers, punctuation marks, and even graphics, through different widths and combinations of bars and spaces. It is composed of a certain number of bars, spaces and other corresponding characters according to certain rules. It is used to represent a certain information such as commodity item, specification, manufacturer, purchase, etc., and input to computer system for processing through photoelectric conversion equipment or image processing system to achieve automatic identification to achieve more convenient information input.
