The traditional 1D barcodes when scanned translated into a number, for instance in a supermarket the number is matched with a product id and the price is obtained. A 2D (two-dimensional) barcode is a black & white data matrix which contains information in both the vertical and horizontal directions, whereas a 1D bar code contains data in one direction only.
2D barcode holds a considerably greater volume of information than a 1D barcode. It can include all sort of information like URL’s or phone number or email address or any other information you like, basically any string of text up to a certain level.
A QR (Quick Response) code is a kind of 2-D (two-dimensional) barcode. It was created by Toyota subsidiary Denso-Wave in 1994, the QR code is one of the most popular types of two-dimensional barcodes.
Features of QR Codes
QR Code provides the following features compared with conventional bar codes.
High Capacity Encoding of Data
While conventional bar codes are capable of storing a maximum of approximately 20 digits, QR Code is capable of handling several dozen to several hundred times more information.
QR Code is capable of handling all types of data, such as numeric and alphabetic characters, symbols, binary, and control codes. Up to 7,089 characters can be encoded in one symbol.
Small Printout Size
Since QR Code carries information both horizontally and vertically, QR Code is capable of encoding the same amount of data in approximately one-tenth the space of a traditional bar code.
Dirt and Damage Resistant
QR Code has error correction capability. Data can be restored even if the symbol is partially dirty or damaged. A maximum 30% of codewords can be restored. Or this space can be used to personalize a QR Code
Readable from any direction in 360°
QR Code is capable of 360 degree (omni-directional), high speed reading. QR Code accomplishes this task through position detection patterns located at the three corners of the symbol. These position detection patterns guarantee stable high-speed reading, circumventing the negative effects of background interference.