Two-dimensional code (2-dimensional bar code) is a specific geometry according to certain rules in the plane (two-dimensional direction) distribution of black and white graphic record of the data symbols of information in the preparation of the clever use of the code constitutes a computer based on internal logic " 0" , " 1" bit stream of the concept, using the binary number corresponds with the geometric shape to represent the text value of information, through the image input device or the optical scanning device automatically literacy to achieve the automatic processing of information: two-dimensional bar code/two-dimensional code can be both horizontal and vertical directions while the expression of information, so the area can be expressed in a small amount of information.

QRCode国家标准.doc

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