The generation and use of QR codes
Posted August 26, 2011 at 4:01 pmFiled under: QR codes by Ed Weaver Follow @wapplemobilewebThe use of QR codes has grown considerably in recent times. Here at Wapple we are often asked questions regarding their use and specification.
Regarding size, it is obviously important that a user is able to easily snap the code from their smart-phone. The size that you want to have the QR code at is going to be a function of a couple of variables.
Firstly, how close the consumer can get to the code (if it’s on a wall 30ft away it will need to be bigger than signage that the consumer could reach out and touch!)
Secondly, how noticeable the QR code needs to be. It is in fact possible to scan a code that is 1cm square if you are actually holding the object. To enhance the presence of the code however to create awareness the code will need to be as large as the design permits.
On a magazine page we would suggest that the QR code be 4cm square on the page. The consumer could then hold a typical device at roughly 10 – 15 cm from the page and scan the code easily. And this size, is in my opinion, ‘noticeable’ enough.
On point of sale materials we would suggest the code should be larger – 17cm square. The consumer could be several feet away and still snap it (unless lighting is very poor!).
Quick note on QR code graphics. As you work up your artwork be sure to maintain the black and white contrast as you scale it. Using nearest image interpolation is the best way to preserve the edges of the image, ensuring the codes doesn’t become distorted.
You can generate QR codes using Wapple Canvas for any page of a site. This can be done via Tools – URL Generator. For a specific URL included in a QR code Canvas can track and report on the performance metrics, to do this a ‘Campaign’ will be required, set up through Canvas via Site – Access – Campaigns.
Ed Weaver
With regards to large scale printing of QR codes, it is always best to make sure you have a vector version of your code to ensure accuracy and clarity when scaling.
A handy QR code generator can be found here:
http://qrcode.littleidiot.be/
This allows you to download a version of your QR code in vector format.