QR Code is a matrix symbology consisting of an array of nominally square modules ,arranged in an overall square
pattern, including a unique finder pattern located at three corners of the symbol and intended to assist in easy
location of its position, size and inclination. A wide range of sizes of symbol is provided for together with four
levels of error correction. Module dimensions are user-specified to enable symbol production by a wide variety of
techniques. QR Code Model 1 is the original specification for QR Code; QR Code Model 2 is an enhanced form of
the symbology with additional features and can be auto-discriminated from Model 1 . This International Symbology
Specification describes both models of QR Code.