In terms of information expression, two-dimensional code can express different information in both horizontal and vertical directions at the same time, can store dozens of times the information of bar code, and can fuse images, sounds, words and other information; Functionally, the QR code not only has the basic recognition function and is easy to read, but also can display more detailed product content and save paper.
There are many kinds of QR codes, among which the most common one was invented by Denso -Wave Company in 1994, and QR is the abbreviation of English Quick Response. Obviously, the inventor just hopes that the QR code can quickly decode its content, which is also the most remarkable feature of the QR code at present.
The QR code also includes the characteristics of good confidentiality, low production cost, large capacity and wide coding range. With error correction function, the information can still be recovered and read correctly when the damaged area of the QR code reaches 50%. The decoding reliability is high, and the bit error rate does not exceed one in ten million.
In addition to being widely used in archive information storage, logistics and transportation management, identity recognition, multimedia reading, online shopping, instant dating software, advertising marketing, electronic bills and other fields, some more novel applications are being continuously explored.
A family farm in Lacome, Alberta applied for the certification of a strange corn maze, which became the largest and available QR code in Guinness World Records. This corn maze covers an area of 28,760 square meters. If someone takes a helicopter and scans this maze pattern with a smart phone over the corn maze, they can automatically jump to the exclusive website of the farm. Originally a tool to identify business information, it has become interesting.
Two-dimensional code house number Panyu District, Guangzhou has recently innovated, developed and tried out the "smart phone inspection system for rental houses". When renting a house, the manager can read the two-dimensional code information on the house number with a smart phone, so as to accurately obtain the address information.
Two-dimensional code bus service. Want to know how far your bus is from the station, or how many minutes it takes to get to the terminal, just scan the QR code with your mobile phone and log on to the bus service website, and you can easily know. At present, many cities in China have begun to realize this kind of bus service. Bus passengers can not only get all the ride information, but also get the information about eating, drinking and having fun near the bus station, and the lost and found can also be released through this platform.
Anti-counterfeiting invisible QR code. Because of the further development of printing technology such as phosphor, some commodities begin to use invisible QR codes. These invisible QR codes are invisible to the naked eye and must be scanned and verified by infrared laser irradiation. Because the production process of this technology is complex, counterfeiters can't copy it easily.
Two-dimensional code navigation An international sculpture exhibition held in Shanghai introduced the technology of two-dimensional code nameplates (signboards installed on machines, meters, motor vehicles, etc.). ). After taking pictures of the QR code and decoding it, smartphone users can hear the specific voice introduction about the sculpture by sticking their mobile phones to their ears, which not only saves the trouble of voice navigation, but also won't disturb other visitors because of the introduction of big speakers.
In order to understand the function of QR code, the 500-word composition first talks about technology and principle, and then about application.
One of the forms of two-dimensional code information exchange.
The process of transforming text and other information into two-dimensional code graphics is called coding.
The process of restoring two-dimensional code graphics to information such as text is called decoding.
The use of QR code is closely related to its characteristics, so let's talk about the characteristics first, and then talk about the use of this characteristic.
1. Because of its large capacity, a large amount of data can be stored in the image lattice. For example, the contents of a book can be stored on an A4 page. But you can't see it with the naked eye, you must use professional equipment and software to see it. Soft Power is developing a barcode, which can save about 300,000 words of a book on a piece of A4 paper.
2. By encryption, confidential documents can be saved in printed form. For example, confidential information can be stored in a QR code. Our commonly used two-dimensional code anti-counterfeiting is also conducive to its encryption.
3. QR code can be stored in the form of electronic pictures, so it can be easily spread through the Internet, WAP and MMS.
Two-dimensional code evaluation of the entry composition: After reading this essay, I was deeply infected by the feelings expressed by the author in his own way. This true emotional expression made the composition convey a strong appeal, and I also cried. I got an A in this composition-according to the general composition requirements, although it is not excellent at all. I got an A in this composition because it has the quality of "from the heart". Some students are writing. Writing about other people's sufferings, sorrows and sorrows, fortitude and misfortune, the author of this essay puts himself in the emotional center and expresses his true feelings with simple words: sympathy and strength are all in it, so that we can see not only the ruins, but also the ruins. The ability to express emotions is innate, so your writing ability is innate-just, you sometimes ignore the grasp and excavation of this innate ability. Please write a composition centered on "your own feelings" so that you will feel comfortable when writing.
The two-dimensional code of the composition column is when I was in the third grade, studying at Gewei English School. One morning, I was chatting with my 12-year-old sister, and Miss Bai brought a new classmate. He has a crew cut, dark face, rustic clothes and a limp. It's really funny. He lowered his head and said, "My name is Zhang Xiang, from Jianyang." After listening to the introduction of English with strong local accent, everyone laughed. I thought to myself: Hum, hillbilly, come to the city to study and go to cram school. It's really overreaching. So I often tease him after class. But Zhang Zhangxiang doesn't think so every time. He just smiles and looks very tolerant, and I am getting more and more presumptuous.
One day after school, the weather was very sultry. Suddenly, after the strong wind blew, the dark clouds from the northwest wind came overwhelming. When it was dark, the students ran home in panic. Suddenly I saw Zhang Xiang limping into the eaves of a shop to hide from the rain. I also pretended to hide from the rain and came home.
A recent new trend in China has attracted the attention of international media. In restaurants in first-tier cities such as Beijing and Shanghai, service staff will wear an extra QR code card. If the customer recognizes the service of the service personnel, he can pick up the mobile phone and sweep it and pay the "reward". This trend started from June 20 15 to June 2008+00, and it has been popularized in some big cities in China and welcomed by many young diners in China. According to a commentary on the website of National Radio, young diners in China are willing to pay for better service, and they are leading the recovery of tipping culture in China.
The wave of "rewarding" in China's catering industry originated from rewarding articles from the media on the Internet. This is probably the first time to move this model to the real industry, whether it is domestic or international. However, when it comes to tipping waiters, we have to mention Europe, the originator of "tipping culture".
Can I write a composition with QR code? The more words, the harder it is to recognize. At present, the general two-dimensional code generator has a word limit, generally between 200 and 300, and the number of words generated according to different software functions is different!
Then you'd better talk to the moon for a while.
Chatting with the moon
I am a member of nature-grass. My name is Qin Xiao. \x09 \x09
Play with Xiaohua until evening today. Xiaohua was tired and fell asleep. I feel very lonely. Suddenly, I found a lonely person-Sister Moon. So I started chatting with Sister Moon. \x09 \x09
"Moon elder sister, why don't you go to bed? Are you as sleepy as I am? " Sister Moon smiled and said, "No, I didn't sleep because it was dark at night. I use my light to shine on the earth, so that bugs on the way home will not get lost and children who are afraid of the dark will not dare to sleep. " Oh, sister moon, you are great! ""Speaking of greatness, I am not as good as Grandpa Sun! The sun shines on the earth without a moment's rest, "said Sister Moon. Sister asking for the moon said, "Sister Yue, why don't you get married? In this way, you will have company. "Sister Moon said," Although it is good to have company, you will have a little moon when you get married, and they will shine with me. In this way, the animals on the earth will be very cold and will take the place of the sun father-in-law during the day. At that time, there will be no daytime, crops will die without sunshine, and the final result will be people's livelihood. " I can't help but give my thumbs up to Sister Moon.
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