13/01/2023
Two-dimensional Code technology research began in the late 1980s, in the two-dimensional Code symbol representation technology research has developed a variety of Code, common PDF417, QR Code, Code 49, Code 16K, Code One, etc.. The information density of these two-dimensional codes is greatly improved compared with the traditional one-dimensional code. For example, the information density of PDF417 is more than 20 times that of CodeC39.