You have probably seen QR Code a lot. Of course, most of us pass by them without paying attention. QR stands for Quick Response and it means quick response coding.
One of the interesting applications of QR Code is in business cards. It is possible to design a QR Code in such a way that when a person scans it with a camera, all the contact information placed in it will be stored in the contact section of his mobile phone and there is no need to create a new contact manually.
So it can be said that this coding can be read and recognized quickly.
The history of 2D barcodes
Around the 1960s, that is, about 50 years ago, when Japan entered the post-war period of growth, the volume and variety of goods in supermarkets increased greatly. One of the serious problems of those years was the use of salespeople who could remember the types of goods and their prices and specifications.
At that time, the idea of barcodes was first proposed in Japan, and DENSO WAVE started producing barcode scanners at that time.
In the following years, the need to use barcodes increased every day, and the amount of information that could be stored on a normal linear barcode was very small. Many customers of DENSO , which was one of Toyota’s suppliers, wanted to find a solution to this problem.
Masahiro Hara was the one who invented the solution. Placing information in a QR Code square structure, in a form that is less commonly used on industrial packaging, and is also simple to produce.
The research to design this code took 18 months. They had to go through a large volume of written papers to find the proportion of black to white color in them. They can also design a type of black and white distribution in a square frame that can be read with the highest speed, the least error and from any angle.
The automobile industry, especially Toyota, with its variety of parts, was the primary customer of this system. But today, the use of this barcode has become popular in seminars, parties, exhibitions, on the boxes of goods, business cards, etc. Sometimes this system is even used for fun!
Example of QR Code
The image you see below is one of the world’s largest QR Codes, which was created in Toronto in 2010 to be the first human-made barcode that can be read from outside the Earth’s atmosphere!
But the Guinness record for the largest barcode is held by a Canadian farming family, which you can see here:
Naturally, this barcode is also easily read from outside the planet and can direct astronauts to the website of this family farm! Of course, assuming that they are equipped with the Internet on the planet. Every year, this family builds a variety of labyrinths or mazes with their fields, which have long been a favorite of gardeners and grand palace owners. In 2012, they decided that this labyrinth and winding path had a more serious message, and that was the address of the farm’s website. The owners of the farm describe that the first time they went up by helicopter, their mobile phone could not recognize this code. QR codes do not necessarily have to be black and white. But they should have enough contrast to be recognized. They returned to the ground again and made more corrections on the surface of the soil until finally they were able to read the website address of their farm from inside the helicopter with their mobile phone!
QR Code construction
It’s time for you to try QR Codes. Most of the Android smart phones these days are equipped with programs for reading QR and by using the market application you can download and use all kinds of QR Code programs. If you use the Apple family and the iOS operating system, you can download the QR Reader program from here .
Now, to make sure the installation is correct, run the program and read the barcode below.
But we have a more important task ahead of us, and that is the creation of 2D barcodes. I suggest you visit the following site:
QR Code barcode production site
Now you can convert the website address, or a desired Farsi or English text, business card or any other information you like into a 2D barcode.
The 2D barcode, according to those who speak and think in the field of human-computer interaction, is more than just a facilitating invention. The 2D barcode has reconciled the digital world with paper again.
Again, bits and bytes can be written and printed on paper, and in other words, the incomprehensible numbers and figures of the digital world can be converted into writing. Physical and real writings that simply return to their original place of life with a mobile device.
In the end, the question that arises is whether this code is unique or not?
QR Code is a method of coding or encrypting information. Just like you enter the numbers from the decimal system into the binary system or like you translate the alchemist’s book from English to Farsi. So the content of the QR Code is completely dependent on the original content and origin.
If the code of a part of Toyota is the same as your phone number, the result after decoding is obviously the same.
The working method and rules of QRcode are fully explained in the English Wikipedia, but in summary it can be said that how many bytes of information are stored in binary or zero and one, and how many bytes are used for error correction.
The following pictures are very telling to explain this issue, but I am interested to know what is your personal opinion on this matter?
