How does barcoding work? Is it possible to distinguish the origin of goods?

barcode is a graphic identifier that expresses a group of information by arranging multiple black bars and blank Spaces of different widths according to certain coding rules.

A common bar code is a pattern of parallel lines with very different reflectance of black bars (short for bar) and white bars (short for empty). Bar code can mark the country of origin, manufacturer, commodity name, production date, book classification number, mail starting and ending place, category, date and other information, so in commodity circulation, library management, postal management, banking system and many other fields have been widely used.

Superiority of bar code

Strong reliability: The accuracy of barcode reading is much higher than that of manual recording, with an average error every 15,000 characters.

High efficiency: Bar codes can be read quickly, equivalent to 40 characters per second.

Low cost: Compared with other automated identification technologies, barcode technology requires only a small sticker and a relatively simple optical scanner, which is relatively low cost.

Easy to make: Bar codes are simple to write and only require printing to make. They are called "printable computer languages".

Easy to operate: bar code recognition equipment is simple in construction and easy to use.

Flexible and practical: bar code symbols can be manually input by keyboard, can also be composed of identification system with related equipment to achieve automatic identification, but also can be linked with other control equipment to achieve automatic management of the whole system.