QR codes were created in 1994 by Denso-Wave. The codes consist of a 2D matrix, which acts as a link between the physical world and that of the Internet. This link is a powerful one, taking the user directly to the intended content be it a text, number or website. QR codes are monochrome codes made from a series of modules used to interpret the data. The modules form a pattern which when scanned, can be scanned from any direction as three markers set the position of the code. What makes this codes better than a bar code is the use of the 2D feature they have, as data can be stored along the code and up the code too. Depending on the data retrieved, the code can be accessed online or offline. Offline retrievals do not require an Internet connection as they are dealt with on the phone itself. Online codes do require an Internet connection, as they need to connect to a URL. Online codes are best for retrieving data to direct people to a website, something which has a lot of data; where as a offline code is best for small amount of text like a number or short text message.
QR codes are becoming popular for advertising in the western world as smart phones with the capability of decoding the QR codes are becoming widely available and allow advertisers to take the user directly to the product. When a user sees a QR code, they can retrieve the data from the code with a mobile smart phone. The phone needs to have a camera built into it and the own also needs to have installed a specialised app, capable of decoding QR codes. When using the app, the user can scan the QR code to retrieve the data it stores.
There are many different websites where people can get QR codes. The one used in the project was http://qrcode.kaywa.com/.
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