came up with a new type of bar code that could hold exponentially more information than the vertical bar patterns in use at the time. The QR code, as Hara’s code is now better known, emerged out ...

Bar codes store information along one axis, horizontally. QR codes store information in both vertical and horizontal ... as a series of black and white lines of various widths.

There are a plethora of inbuilt features such as QR Code web site sharing ... The required data is then extracted from patterns present in both horizontal and vertical components of the image.