2D code/QR code /2D workshop (a form of 2D code-the most widely known one) [1] is a black-and-white graphic that records data symbol information on a plane (two-dimensional direction) with a certain geometric distribution. In coding, the concepts of "0" and "1" bit streams, which constitute the internal logic foundation of the computer, are skillfully used, and several geometric figures corresponding to binary are used to represent the numerical information of characters, which can be automatically read by image input equipment or photoelectric scanning equipment to realize the automatic processing of information: it has some characteristics of barcode technology: each code system has its own specific character set; Each character occupies a certain width; It has certain verification function. At the same time, it also has the characteristics of automatically identifying different lines of information and dealing with the rotation and change of graphics. Among many kinds of two-dimensional codes, the commonly used coding systems are: data matrix, Maxicode, AZTEC, QR code, Vericode, PDF 4 17, Ultra code, Code 49, Code 16K, etc. Two-dimensional code was invented by Denso Wave Corporation of Japan in 1994. QR comes from the abbreviation of "Quick Response" in English, that is, the meaning of quick response, and comes from the inventor's hope that the QR code can quickly decode its content. QR codes are the most common in Japan and South Korea. It is the most popular two-dimensional space bar code in Japan.
The origin of two-dimensional code is Japan, which was originally designed by Denso Wave Company to track auto parts. It records data symbol information in a plane (two-dimensional direction) with a certain geometric figure and according to a certain law. In coding, it skillfully uses the concepts of "0" and "1" bit streams, and uses several geometric figures corresponding to binary to represent the numerical information of characters, which can be automatically read by image input equipment or photoelectric scanning equipment to realize automatic processing of information.
2D barcode/QR code can be divided into stacked 2D barcode and matrix 2D barcode. It has some characteristics of bar code technology: each coding system has its own specific character set; Each character occupies a certain width; It has certain verification function. At the same time, it also has the characteristics of automatically identifying different lines of information and dealing with the rotation and change of graphics. The stacked/row-arranged two-dimensional bar code is formed by stacking a plurality of rows of chopped one-dimensional bar codes; Matrix two-dimensional bar code consists of a matrix, in which binary "1" is represented by dots and binary "0" is represented by spaces, and the arrangement of dots and spaces constitutes a code. Stacking/arrangement
Stacked/line 2D barcode is also called stacked 2D barcode or layered 2D barcode), and its coding
Common QR code
The principle is based on one-dimensional bar codes, which are stacked into two or more lines as required. It inherits some characteristics of one-dimensional bar code in coding design, checking principle and reading mode, and the reading equipment is compatible with bar code printing and one-dimensional bar code technology. However, due to the increase of the number of lines, it is necessary to judge the number of lines, and its decoding algorithm and software are not exactly the same as those of one-dimensional bar code. Representative two-dimensional bar codes are: Code 16K, Code 49, PDF4 17, etc. Matrix QR code
Matrix two-dimensional bar code (also called checkerboard two-dimensional bar code) is coded in rectangular space through the different distribution of black and white pixels in the matrix. In the corresponding element bit of matrix ... >>
Question 2: What is a QR code and what is its principle? The answer is as follows:
Two-dimensional code ui is a kind of two-dimensional code, which is different from the traditional one-dimensional code (such as bar code on goods). Two-dimensional code stores information in both horizontal and vertical directions, so the information capacity is greatly improved. QR code? It is a registered trademark of Denso Wave Company.
What are QR codes and mobile phone QR codes?
Two-dimensional bar code is a kind of black and white figure distributed on a plane (two-dimensional direction) according to certain rules, which is used to record data symbol information. In coding, the concepts of "0" and "1" bit streams, which constitute the internal logic foundation of the computer, are skillfully used, and several geometric figures corresponding to binary are used to represent the numerical information of characters, which can be automatically read by image input equipment or photoelectric scanning equipment to realize the automatic processing of information: it has some characteristics of barcode technology: each code system has its own specific character set; Each character occupies a certain width; It has certain verification function. At the same time, it also has the characteristics of automatically identifying different lines of information and dealing with the rotation and change of graphics. Two-dimensional code/two-dimensional code can express information in both horizontal and vertical directions at the same time, so it can express a lot of information in a small area.
The cooperation of QR code and mobile phone camera will produce many applications. For example, in the future, we can print the QR code on our business card, and others only need to take a photo with a camera phone with QR code recognition software, and all the information on the business card will be input into the phone; If the goods in the supermarket are also printed with QR codes, we can get a lot of detailed information about the goods on the mobile phone. At present, the QR code has been widely used in Japan and South Korea, and it has also been popularized in Taiwan Province and Chinese mainland. In the future, we can use QR code to buy coke, pay bills and shop online in vending machines.
Classification of 2D Barcode/QR Code
2D barcode/QR code can be divided into stacked 2D barcode and matrix 2D barcode. The stacked/row-arranged two-dimensional bar code is formed by stacking a plurality of rows of chopped one-dimensional bar codes; Matrix two-dimensional bar code consists of a matrix, where binary "1" is represented by dots, binary "0" is represented by spaces, and the coding consists of dots and spaces.
? Two-dimensional bar code with stacked/row arrangement
Stacked/line 2D barcode (also called stacked 2D barcode or layered 2D barcode), its coding principle is based on one-dimensional barcode and stacked into two or more lines as required. It inherits some characteristics of one-dimensional bar code in coding design, checking principle and reading mode, and the reading equipment is compatible with bar code printing and one-dimensional bar code technology. However, due to the increase of the number of lines, it is necessary to judge the number of lines, and its decoding algorithm and software are not exactly the same as those of one-dimensional bar code. Representative two-dimensional bar codes are: Code 16K, Code 49, PDF4 17, etc.
? Matrix QR code
Short array two-dimensional bar code (also known as chessboard two-dimensional bar code) is coded in rectangular space by the different distribution of black and white pixels in the matrix. In the position of the corresponding element in the matrix, the binary "1" is represented by the appearance of points (squares, points or other shapes), and the binary "0" is represented by the absence of points. The arrangement and combination of points determine the meaning represented by matrix two-dimensional bar code. Matrix two-dimensional bar code is a new coding system based on computer image processing technology and combined coding principle, which can automatically read and process graphic symbols. Representative matrix two-dimensional codes include: code one, Maxi code, two-dimensional code, data matrix and so on.
At present, among dozens of QR codes, the commonly used code systems are: PDF4 17 QR code, Datamatrix QR code, Maxicode QR code, Code 49, Code 16K, Code One and so on. In addition to these common two-dimensional barcodes, there are Vericode barcode, CP barcode, Codablock F barcode, Tian Zi barcode and Ultracode. ...& gt& gt
Question 3: What does the QR code mean? QR(Quick Response) code, also known as two-dimensional bar code, is a black-and-white figure with specific geometry and distributed on the plane (two-dimensional direction) according to certain rules, and it is a key for all information and data. In modern business activities, it can be widely used, such as product anti-counterfeiting/traceability, advertisement push, website link, data download, commodity trading, positioning/navigation, electronic certificate, vehicle management, information transmission, business card exchange, wifi*** enjoyment and so on.
Question 4: What is a two-dimensional code, also called a two-dimensional bar code? It is a readable bar code based on one-dimensional bar code. The equipment scans the two-dimensional bar code, and the information contained in it can be obtained by identifying the binary data recorded on the length and width of the bar code. Compared with one-dimensional bar code, the data recorded by two-dimensional code is more complicated, such as pictures and network links.
brief introduction
Two-dimensional code/two-dimensional code is to record the information of data symbols distributed on a plane (two-dimensional direction) according to certain geometric figures and certain rules. Clever use of two-dimensional code which constitutes the internal logic foundation of computer in code compilation.
The concepts of "0" and "1" bit streams based on "0" and "1" represent alphanumeric information with several geometric shapes corresponding to binary, which are automatically read by image input equipment or photoelectric scanning equipment to realize automatic information processing: they have some characteristics of barcode technology: each code system has its own specific character set; Each character occupies a certain width; It has certain verification function. At the same time, it also has the characteristics of automatically identifying different lines of information and dealing with the rotation and change of graphics. Among many kinds of two-dimensional codes, the commonly used coding systems are: data matrix, Maxicode, AZTEC, QR code, Vericode, PDF 4 17, Ultra code, Code 49, Code 16K, etc. Two-dimensional code was invented by Denso Wave Corporation of Japan in 1994. QR comes from the abbreviation of "Quick Response" in English, that is, the meaning of quick response, and comes from the inventor's hope that the QR code can quickly decode its content. QR codes are the most common in Japan and South Korea. It is the most popular two-dimensional space bar code in Japan.
Question 5: What does QR code APP mean? It is an application that can scan the QR code to read the information inside.
Question 6: What does the QR code of mobile phone WeChat mean? How to use the QR code of mobile phone WeChat is mainly used to quickly add friends.
These steps are:
Take out your mobile phone and log on to WeChat.
Select "Scan".
Then put the QR code in the frame to scan.
After the scan is successful, the friend information will be displayed.
Then click Add to Address Book to add friends, so adding friends with this function is very simple and convenient!
Two-dimensional code is a kind of two-dimensional bar code. Information such as website address, text and photos can be compiled into a square bar code pattern by corresponding coding algorithm, and mobile phone users can re-decode relevant information and view the content through camera and decoding software.
Question 7: What is a QR code? What is its function? How to use the QR code? QR code? Now many web pages have this function, which is convenient for mobile users. Only by scanning the QR code directly on the mobile phone can you go to the corresponding website and download the corresponding mobile phone client software. This is just an identification code. The webpage call has a special code that can generate a unique QR code for your things.
Question 8: How to use the QR code and what is its function? Please advise! Two-dimensional code, also known as two-dimensional bar code, is a black-and-white figure with specific geometry and distributed on the plane (two-dimensional direction) according to certain rules, and it is a key for all information and data. In modern business activities, it can be widely used, such as product anti-counterfeiting/traceability, advertisement push, website link, data download, commodity trading, positioning/navigation, electronic certificate, vehicle management, information transmission, business card exchange, wifi*** sharing and so on. Now the application of smart phone scanning function (3 13 for short) makes QR codes more common.
Question 9: What exactly is a QR code? Two-dimensional code is a bar code technology that records the data symbol information with certain geometric figures distributed on the plane (two-dimensional direction) in black and white.
As the name implies, the QR code electronic certificate is sent to the user's mobile phone by SMS or MMS to achieve marketing purposes, including SMS and MMS. Based on the SMS interface directly provided by China Mobile, China Unicom and China Telecom, the purpose of sending SMS or MMS in batches and customizing the number specified by customers is realized.
With the continuous development of economy and the continuous updating of marketing means, QR code marketing has become a new marketing model. Compared with ordinary SMS marketing, on the basis of the advantages of ordinary SMS, the use of QR code is more convenient, fast and fashionable, which provides strong support for enterprises in company promotion, product sales, customer experience and information collection. With the expansion of functions and the rapid development of technology, QR code marketing platform, as a new generation of commercial marketing model, is favored by enterprises.