QR - Code Technology

QR(Quick Response Code) code is a specific matrix barcode that is readable by dedicated QR barcode readers and camera telephones. The code consists of black modules arranged in a square pattern on a white background. The information encoded may be text, URL, or other data.QR code is one of the most popular types of two-dimensional barcodes. The QR code was created to allow its contents to be decoded at high speed. It was created by Toyota subsidiary Denso-Wave in 1994

QR Codes VS Bar Code
QR-Codes have become more popular than the typical barcode as the typical barcode can only hold a maximum of 20 digits, whereas the QR-Code can hold up to 7,089 characters. This makes the use and diversity of QR-Codes much more appealing than their older counter part, the barcode.when you compare a typical barcode to a QR-Code, you can see one major difference; barcodes only span horizontally whereas QR-Codes can span both horizontally and vertically.

How QR Codes Work?
QR Code Generators
There are a number of sites for generating QR codes and they’re all free.You can use it to create QR codes that link to a web page, text, phone numbers, or SMS.Here,I listed some site for generating QR codes below:
http://qrcode.kaywa.com/
http://goqr.me/
http://www.qrstuff.com/
http://keremerkan.net/qr-code-and-2d-code-generator/
http://zxing.appspot.com/generator/
http://www.snapmaze.com/

QR Code Readers
People with mobile phones and an internet connection, can take a snapshot of the code and find out what it says.There are many application available to decode an QR code.Here,I listed some application for reading/decoding QR codes below:
i-nigma
Barcode Scanner
Beetagg
Kaywa
lynkee
flick2know
You can also decode your QR code by uploading QR code image to an online QR decoder site.Here,I listed some site for decoding QR codes below:
ZXing Decoder Online
MiniQR
Online Barcode Reader
Patrick Wied QR Generator
QR Code Generator and Recovery

Practical Uses of QR Codes
Here are some ways for using QR codes that are mostly in practice now, as well as a few that I believe we will be seeing in the very near future.

• Business Cards
• Logo Jet
• Coins
• Clothing Designer
• Website
• Product tags and packaging
• Magazine/Newspaper
• Interactive Television
• Email Signature Block
• Restaurant menus
• Marketing
• Facebook,Twitter,etc.,

Future of QR Code
QR code is the next generation of barcodes will hold even more information – so much that an Internet connection will not even be necessary.  The content will be effectively embedded in the code.QR code reterive an information faster than other image processing system.