Bar code card contains code (
Article 39 bar code, 128 bar code, etc. )
And QR code, this is mainly related to the rules and standards of the code.
Code rule is the main basis of identification code.
Bar code consists of a set of rules, and its corresponding blank characters.
The bar code such as daily commodity packaging is 39 bar code.
Its information storage capacity of a code can only be stored, when used by the code number and access to a computer network.
According to the development of QR codes in recent years, it can store more information in the limited space, including text, images, fingerprints, signature, etc. , and can not use a computer to use.
At present, the common code has the following kinds: (
39 bar code, bar code 128, 13 barcode, EAN codes, etc.
Bar code card is very simple, ordinary barcode can be print or copy, in accordance with the requirements of the certain cost low, but the reader devices (
Especially the QR code reading device)
Compared with the magnetic card and IC card, barcode card information cannot be changed.
In addition, security is poor, do not have a unified standard.
All of these limits its application.