Bar codes can be divided
into two categories: 1D barcode and 2D barcode, 2D barcode can
contain lots of data and other information.
2D bar code /
2-dimensional bar code (2-dimensional bar code) is a certain
geometry according to a certain law in the plane (two-dimensional
direction) distribution of black and white graphics data symbolic
information; The use of a number of binary corresponding to the
geometric shape of the text to represent the text of the value of
information, through the image input device or photoelectric
scanning device to automatically read to achieve the concept of "0"
and "1" bitstreams that make up the internal logic of the computer
Automatic information processing: it has some common bar code
technology: each code has its own specific character set; each
character occupies a certain width; has a certain check function and
so on. But also has a different line of information automatically
identify the function, and deal with graphics rotation change point.
The difference:
Multi-line bar code, do not need to connect a database, itself can
store a lot of data, used in: hospitals, driver's license, material
management, cargo transport, when the bar code by a certain damage,
the error can correct the bar code can correctly decode the
two-dimensional code The It is a multi-line, continuous,
variable-length, symbolic identifier that contains large amounts of
data. Each barcode has 3 - 90 rows, each line has a starting
portion, a data portion, and a terminating portion. Its character
set includes all 128 characters, the maximum data content is 1850
characters.
A one-dimensional bar
code is only in one direction (usually horizontal) to express
information, and in the vertical direction does not express any
information, its certain height is usually to facilitate the
reader's alignment.
One-dimensional bar
code application can improve the speed of information entry, reduce
the error rate, but one-dimensional bar code also has some
shortcomings:
Data capacity smaller: 30 characters or so, can only contain letters
and numbers;
Bar code size is relatively large (low space utilization);
After the bar code has been damaged, it can not be read;
A bar code that stores information in two-dimensional space in the
horizontal and vertical directions is called a dimensional bar code. |
The most commonly
used two-dimensional code is QR Code, QR full name Quick
Response, is a mobile device in recent years on a super-popular
encoding, it than the traditional Bar Code bar code can save
more information, but also that more Of the data type.
Features
● information access (business card, map, WIFI password, data)
● website jump (jump to microblogging, mobile site, website)
● Advertising push (user scan, direct browsing business push
video, audio advertising)
● mobile phone business (user sweep code, mobile phone direct
purchase orders)
● anti-counterfeiting trace (user scan code, you can view the
production site; at the same time the background can get the
final consumption)
● Promotional promotions (user sweep, download electronic
coupons, draw)
● member management (user phone to obtain electronic membership
information, VIP service)
● mobile payment (scan goods two-dimensional code, through the
bank or third-party payment to provide mobile phone channel to
complete the payment) |