What Are the Different Methods of Printing QR Codes?
QR Code is a matrix two-dimensional code symbol developed by Denso in September 1994. It has a one-dimensional bar code and other two-dimensional bar codes with large information capacity, high reliability, and can represent Chinese characters and images. A variety of text information, strong confidentiality and security features.
QRCode
QR Code
1. Symbol specifications range from version 1 (21 × 21 module) to version 40 (177 × 177 module). Each version is increased by 4 modules on each side.
2. Data type and capacity (refer to the maximum specification symbol version 40-L):
Numeric data : 7,089 characters
Alphabet data : 4,296 characters
8-bit data : 2,953 characters
Kanji data : 1,817 characters
3. Data representation method:
Dark modules represent binary "1" and light modules represent binary "0".
4, error correction ability:
Level L : about 7% of error-correctable data code words
M level : about 15% of data code words that can be corrected
Q level : about 25% of data code words that can be corrected
H level : about 30% of data code words that can be corrected
5. Structural link (optional)
A group of information can be represented by 1-16 QR Code code symbols. Each symbol represents 100 characters of information. [1]
1. Digital data (numbers 0-9);
2. Alphanumeric data (numbers 0-9; capital letters A Z; 9 others
(Refers to the maximum specification symbol version 40-L)
8-bit byte data: 2,953 characters
Kanji data: 1,817 characters
Data representation
Dark modules represent binary "1" and light modules represent binary "0".
Error correction ability
· Level L: about 7% of error-corrected data code words
· M level: about 15% of data code words
· Q level: about 25% of data code words that can be corrected
· H level: about 30% of data code words
Structural link (optional)
A group of information can be represented by 1-16 QR Code code symbols
Mask (inherent)
The ratio of dark to light modules in the symbol can be made close to 1: 1, which minimizes the possibility of decoding difficulties due to the arrangement of adjacent modules.
Extended explanation (optional)
In this way, the symbol can represent data other than the default character set (such as Arabic characters, Guslav characters, Greek letters, etc.), as well as other interpretations (such as data expressed in a certain compression method) or encode the needs of industry characteristics .
Independent positioning function
QR Code codes can efficiently represent Chinese characters, the same content, and its size is smaller than the same density
QR code/
Among dozens of two-dimensional bar codes, the commonly used codes are: PDF417 two-dimensional bar code, Datamatrix two-dimensional bar code, Maxicode two-dimensional bar code, QR Code, Code 49, Code 16K, Code one, etc., in addition to these common two In addition to dimensional barcodes, there are Vericode barcodes, CP barcodes, Codablock F barcodes, field codes, Ultracode barcodes, and Aztec barcodes.
