The code QR was developed by Denso in 1994 to be used to better scan auto parts.
The use of codes QR (Quick-Response) has increased in recent years thanks to mobile phones, which can scan them with their built-in camera. Unlike barcode, which scans through a narrow beam of light, a QR code can and is detected by a two-dimensional digital image sensor and then digitally analyzed by a programmed processor.
The codes QR are used for a variety of applications, such as shopping, airline boarding card scanning, storing business card contacts, etc. They have become even more popular during the COVID-19 pandemic. Many restaurants display codes QR which allow customers to upload the food menu to their phone, allowing them to avoid touching the natural menus.
The code inventors QR are the Masahiro Hara of the Japanese company Dense Wave and Takayuki Nagaya of Toyota Central R&D Labs. The code QR was introduced in 1994 by Denso to speed up the tracking of car parts.
In relation to barcode, which contains a series of up to 12 numbers, which limits how much information can be stored, the QR code can handle numbers up to 7.087 digits. According to its inventor QR, Masahiro Hara, codes are more powerful, can be read accurately even if 30 percent of the code area is dirty or damaged.
The most important feature of a code QR, he says Hara, is that it can be read five times faster than a standard barcode. The codes QR use short URLs, which condense the information into a smaller link that loads faster, according to a post on the differences between barcodes and codes QR in QR Code Generator website.
Because many of the boxes had several barcodes with different information, scanning slows down the production and distribution process. To alleviate the workload of employees, O Hara, who was then one of the company's engineers, began to create a system that could store more information than existing barcodes. So he assembled a team of Denso engineers and began developing a new type of code in 1992.
To fit more data in the new code, the Hara was inspired by the 2D barcodes invented in 1987 by the engineer David Allais in Intermec. In the barcode (UPC) they used only the horizontal axis to hold information, but the 2D barcodes used both the vertical and horizontal axes.
Ο Hara was also inspired by the table strategy Go game, according to the NHK. In this game, the checkers are placed crosswise on a square board. THE Hara applied the idea to the code QR. The points that can have coded spots in a code QR are doubled so that if one is damaged, the others can compensate, accordingly with an article of QR Code Generator, related to scan problems.
When the team started testing their new code with a UPC linear scanner, the device could not read the code. The text surrounding the code interfered with the scan and confused the scanner. THE Hara he had to find a solution, and he found it one morning when he was on the train to go to work.
"I was just looking out the window when I noticed a tall building standing out from its surroundings," he said. Hara in an interview with NHK World-Japan. "That scene was stuck in my head and I realized that the code also needed a special symbol, something to make it stand out from the text."
While experimenting with different frames around the code, the Hara and his team tried different proportions of black and white, trying to make an unusual enough shape to stand out. In the end the team created a database from black and white analogs and then developed software that will analyze the data.
Denso received an American patent in 1998, a Japanese patent in 1999 and a European patent in 2000. In the code QR the ISO 18004: 2015 standard was given in 2000.
As a result of his decision Hara not to retain the patents, the QR Codes found their uses in people's daily lives. This allowed them to be used basically all over the world. Later, with the invention of the smartphone, it did not stop growing in popularity QR Code.
HIS STRUCTURE QR CODES
A password QR It is usually square in shape, as it works in 2 dimensions (horizontal and vertical) and this maximizes its efficiency for possessing and sending large information. The jigsaw puzzle contains seven crucial elements:
Position marking: These guide how a Code is printed.
Alignment signals: For larger codes QR, this item helps with orientation.
Timing plan: These lines tell a scanner the size of the data matrix.
Formatting information: Formatting patterns include error tolerance and data mask pattern information, making it easier to scan the code.
Data and error correction keys: here are the actual data.