The Ingenious Invention of the QR Code
The QR code, an invention of an undercover genius, emerged from the manufacturing floors of Japan to become a very important fixture of modern life. It was first developed in 1994 by an engineer called Masahiro Hara and his team at Denso Wave, a subsidiary of Toyota. The “Quick Response” code was designed for one purpose and one purpose only, to solve the inefficiency of traditional barcodes.
What is the QR code?
A QR code is a type of two dimensional barcode that is able to store information in a grid of black and white squares, readable by designated scanners, or smartphones. These codes were originally used to track auto parts but now link physical objects (the QR code) to digital content such as websites, contact information, or even WiFi networks.
Why was the QR code invented?
The QR code was invented to improve the limitations of traditional scanning of barcodes. These traditional barcodes had restricted information capacity, and required slow directional scanning. The original barcode was designed to reduce the stress on the wrists of cashiers in Japan during the 1960s which previously required typing prices manually. However, as the use of the barcode spread, their limitations became apparent as well. The most prominent of them all was the fact that a barcode can only hold 20 alphanumeric characters or so of information. Thus the QR code was created to hold 7,089 numeric characters, 4,296 alphanumeric characters, and 2,953 bytes of mixed binary data. But have you ever wondered why QR codes don’t ever run out? Well, the term “QR codes” refers to a pattern-generating system, not a finite number of pre-made codes; the number of possible patterns is astronomically large, essentially infinite, meaning we can always create a new unique pattern by encoding different data.
How does a QR code work?
How a QR code works is truly fascinating. First, the code is scanned by a smartphone or a dedicated QR code scanner. Then the scanner first identifies the three large, square “finder patterns” in the corners of the code. Then the finder patterns help the scanner determine the code’s orientation, which is the key to being able to read codes that are titled or skewed. Then the scanner breaks down the rest of the QR code into a grid of small squares, and each black or white square is assigned a value of either 0 or 1, which forms a unique pattern corresponding to the data. Finally this binary data is decoded in human-readable information, such as text and so on.
Where is the QR code used?
The QR code is used in a broad array of applications. These can include payments and commerce, directing to websites, applications, and information sharing. You can also find them very useful in healthcare for patient information or contact tracing as seen with COVID-19 apps. Let us know in the comments how you have used QR codes!
The QR code may have started as a simple solution to the limitations of the original barcodes, but over time it has become a powerful and extremely useful bridge between the physical and digital worlds. From its origins in Japanese factories to its widespread use in healthcare, retail, and everyday life, this small square of pixels continues to prove its versatility. What began as a tool for efficiency is now an invention that connects people, information, and technology with just a quick scan.