What are QR Codes?
Learn about the evolution of bar codes that originated in Japan and is slowly taking the world of products, entertainment and internet !
Everyone knows the barcodes present in all parts of the world, occupying space in the markets packaging products, invoices and bank to serve as identifiers for lines and grades.
But there are a number of limitations with them, ranging from information storage capacity of the size range and size required. How to heal them? With an evolution of the format!
This image (somewhat bizarre) you see above is a QR code , a new type of two-dimensional barcode. The term derives from QR Quick Response, which in English means rapid response, reveals the intention of the creator of an object easy to assemble and decode high-speed imaging generally.
Both a capacity and
In this small space occupied by it (even great on this page), can be stored quantities of the following characters:
Numerical: 7089.
• Alpha-numeric: 4296.
• Binary (8 bits): 2953.
• Kanji / Kana (Japanese alphabet): 1817.
Let it be clear: these figures apply only to one type of data quoted and not the sum of them (ie, 1,817 Japanese characters represent the maximum capacity).
This is possible by combining two dimensions for the creation and reading of the points (unlike the spacing and width to the default), each region of the QR code has its own function, such as positioning, alignment, and version information and other products focused on security.
Security? Simple: reading accuracy and error correction. Without these mechanisms and logarithms would be a very common code to be misinterpreted, which would create a huge inconvenience to both customers and companies. Generally the rate of restoration of information and error correction codes QR fluctuates from 7% to 30%.
There are also numerous standards of reading and printing, all appropriate to the depth of reading and accuracy of different equipment. It is also important to think about the new format will break with the paradigm of identification only.
Although it has been created for the purpose of identifying the original car, its storage capacity allows new global actions varied, dynamic tagging of items and even the transport of data (imagine your identity in a digital format, containing your data of birth, country of origin and everything else).
Popularization unprecedented
In the land of the rising sun - saw where the code originated in 1994 at the hands of the company Denso-Wave - things have been operating for a little more time (since January 1999, when the standard JIS X 0510 was released) .
Mobile phones in Japan are also now prepared to interpret these codes, the customer simply take a picture with the camera phone and send it via Internet to the bank to get the charge right into their hands and take the product upon receipt at the time. Cash? Forget it!
You can also create your own QR codes with many online and offline services available here ( click here to give some examples). Just enter what you want stored (message, link, etc.) and have them generate the image. She is ready in less than a second!
source: Baixaki
