QR Codes: What are they?

QR Code

Qr codes are matrix barcode also known as a two dimensional codes. This was derived from a design from the automotive industry and came into being. The popularity of this in the industry is due to its fast readability as well as access. This is also because of its ability to store large amounts of information. The code looks rather disorganized at first but it is comprised of some black modules that are arranged in a square pattern upon a white background. This is encoded using some data, mostly of any kind such as Kanji symbols as well as alphanumeric and binary numbers.

The codes were created by a Toyota subsidiary in 1994, Danso Wave. This is to have a tracking of vehicles during the manufacture process. This has become one of the most popular kinds of coding that are two-dimensional. The popularity is pegged upon the ability of the customers to decode it at whizz speed. Most of the frequent users of the code emanate from Japan. As well, some of the largest users of the code include the United Kingdom.

The standardization of this can be seen in the way the physical encoding is done. The first system standardization came into being in October 1997. This is through the Association for Automatic Identification and Mobility International, (AIM). As well, it was further developed by the JIS X 0510. Through the efforts in Automatic identification as well as the use of the data capture techniques, the code used the Bar Code symbology to have a standard for the ISO/IEC 18004:2000 Information technology. This system is now withdrawn from the market.

When it comes to error correction, it is possible for people to have the code corrected and freed of errors. This is to mean that you will be able to have code words that are 8 bits long. This is done with the Reed-Solomon kind of method for correction of errors. This comes with four levels of error correction. You also need to know that the higher the level of error correction, the less the storage capacity. This comes in handy when you are in

Due to the design of Reed–Solomon codes and the use of 8-bit code words, an individual code block cannot be more than 255 code words in length. The larger QR symbols contain more data than the normal one, It’s necessary to divide message up into multiple equal blocks. The largest possible block is always reserved for some other work. The QR specification defines the block sizes so that no more than 15 errors can be corrected within each block. This limits the complexity of certain steps in the decoding algorithm. The block- code are then interleaved together, making it less likely that localized single Qr codes will get damaged in the process.

Thanks to error correction, it is always possible to create QR codes that still scan well, but contain intentional errors to make them more readable or attractive to the human eye, as well as to incorporate colors, logos and other features into the QR code block.