QR Code Basics
I’m quite sure, you have noticed these similar spotty square images showing up in lot of places/parts. These pictures are called QR codes (for Quick Response) and with its current popularity trend, you are going to see them a lot more as marketing teams pick-up from manufacturing.
These codes are also known as 2D bar codes, where originally introduced in Japan where they have been used to quickly scan parts in automobile factories. They are called 2D because they can be scanned either side to side or top to bottom. Normal bar codes can only be scanned side to side.
How QR Codes Work
QR Codes can be read using a specialized App on smart phones called the QR Reader. This app launches the built-in camera to take a picture of the code, interpret/decode the message such as Website URL, Contact details, Email address, etc… This process is also known as mobile tagging. Below image highlights the process of mobile tagging.
Try It Yourself
Visit the website called http://qrcode.kaywa.com and follow the steps as outlined below.
You can enter the URL, Text, Phone Number or SMS and generate either Small, Medium, or Large size for the QR Code image, and hit the Generate Button. You should see a QR Code image generated for the type of data selected such as the one below.
Next step is Install a QR Code Reader App on your mobile smart phone (ofcourse, you will need a camera) from your app store or market place.
Launch the QR Code reader application, and tap the Scan or Read button/link on the phone. This in-turn will launch the camera with a small rectangle/square which you should focus on your QR Code image and tap the capture button. It will read the QR Code, decode it, and display the information that you previously recorded.