What is a QR code?

White square with black is increasingly found on products, pages of magazines, billboards and other advertising media. This image is called a QR code. It is encrypted information about the product, service or other data. The manufacturer can encrypt a large amount of data.

What is a QR code and how it works

The abbreviation stands for Quick Response and literally means “quick response”. This method of data encryption is based on a two-dimensional system. Each code contains a certain number of black squares in a unique arrangement. With QR you can encrypt any information in digital, text format, as well as hieroglyphs.

Maximum amount of data:

  • numbers – up to 7000 characters;
  • Latin and Cyrillic characters – up to 4296;
  • hieroglyphs – until 1817;
  • Any information in bytes – up to 2953.

Each QR code contains several structural elements:

  • modular code;
  • search and alignment patterns (3 squares, which are necessary for positioning the scanner);
  • mask codes, correction levels and versions;
  • frame around the image.

A module in the context of a QR code is called one black or white square.

All elements that contain the image are necessary for the stabilization of the code, its correction, ease of reading. Scan encrypted information using a smartphone or special devices. The first method is spread. An application is installed on the gadget that reads information using the built-in camera. Modern smartphones often have a built-in scanner, since the QR-code technology has become firmly established by the users of modern technologies.

The history of the barcode and QR-code

The use of barcode has become commonplace. Its appearance is associated with the emergence of industrial necessity. For the first time, Bernard Silver took on the development of automatic data reading technology in the company of Joseph Wolland in 1948.

After several months of work, young scientists created a version of a linear barcode, which was based on elements of Morse code and the technology of recording sound to movies. Alternating narrow and long black stripes on a white background appeared as a result of the fact that the scientists pulled down dots and dashes.

A few years later, a laser was invented that simplified the barcode reading technology. It became possible to scan the code from different distances, and the device became more compact.
The first demonstration of a workable bar code application and readout system took place in 1971. RCA used a circular bar code that was impractical at that time — when printed, the circles became deformed and scanning became impossible.

At the same time, the well-known company IBM, in which Woolland worked in the 50s, asked the scientist to go to work, where he and his partner George Laurel developed a bar code, which is now familiar to everyone. This development was called UPC – Universal Product Code.

The birthday of a modern bar code is April 3, 1973. And on June 26, 1974, a package of 10 gum was purchased. This check is on display at the Museum of American History at Smithsonian University.

The appearance of a QR code in Japan in 1994 marked the beginning of a new era in the development of logistics. The Japanese company Denso-Wave solved a problem with a lack of information that could be encrypted in a bar code, creating a two-dimensional code in which data was placed. This achievement was used by Toyota, which facilitated the production process. Denso-Wave, although it is the copyright holder of the QR-code technology, did not limit access to this development, but on the contrary, contributed to its spread. Over time, the Japanese, and after them, the whole world began to use QR for industrial and production purposes, the ease of transmitting any information. The scope has become possible due to the popularization of smartphones, since to read the code it is enough to hold a thin beam emitted by the built-in camera of the gadget.

Areas of use

QR code is used in many areas of human activity.
Productions use QR to ensure the control of products, raw materials, materials, descriptions of technological processes.
Shopping centers and warehouses solve the problem of informing their customers about goods or services.
Municipal services encode data on city services, historical monuments.
Advertisers publish information about a product or service, methods of communication.
Using the QR code, you can easily go to the site of interest, send an email, make a call or go to your social network account. This is a simple, reliable and fast way to transfer information.

The use of a QR code has no boundaries and can solve a lot of problems associated with the dissemination of data.

Top applications for scanning a QR code

Such programs are designed for both devices with IOS, and for gadgets running on Android.

Play Market.

Among the programs presented there are several of the most successful:

  1. QR Droid. Pleasant and intuitive interface, the ability to automatically turn on when an image enters the camera lens, go to the site when there is a link. Another important plus is that this application can be used to create your own QR.
  2. QR Code Reader. The application only scans the code and introduces the information received.
  3. BIDI. A universal solution for reading code, creating it using possible information.

For iOS operating system free and paid applications. But it stands out QR Reader for iPhone / iPad. This application can scan the code, use the information contained in it, and also gives the user the opportunity to create his own QR for free. A simple and convenient interface will ensure comfortable use of the functions of the application.

How to create your QR code

The need for graphical data encryption may arise for everyone; it will not be difficult to do when accessing the Internet.

Using online code generators: these sites offer users to enter all the necessary data into special fields, which are then automatically processed. As a result, the user receives his code and can download it, and then use it on various storage media. Such services can be free for private users, as well as provide paid services for advertising or industrial purposes.

Programs for creating codes – on the Internet there is software for large companies, as well as small programs for private use.

Applications on smartphones are often equipped with a code creation function. Just a few minutes to fill in the information fields – and a QR code will be generated.

A QR code is actively gaining popularity in Russia and throughout the post-Soviet space. This method provides the ability to place a large amount of information in one code and successfully convey it to the end user. The availability, ease and practicality of a QR code makes it an indispensable tool for many.