Application scenario of handheld barcode scanner

How on earth is QR code recognized? How does the black and white cube store data?

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

The co-inventor of the bar code has died, He's the one who changed the round size into zebra print

Barcode scanning gun: warehouse essential tools!

On line anti duplication system of fixed barcode scanner

As the identification of products, bar code labels are widely used in all walks of life. However, in the process of printing bar code labels, labels with duplicate numbers will occasionally be printed, which will cause great confusion in the production and supply chain control of products, cause a large number of rework and customer complaints, and the error cost is extremely high. How should we solve this problem?