How does the QR code inkjet printer encode?

Two-dimensional code cij printer Leadtech Coding rules: In the design of the RR code symbol structure, each RR code is composed of square modules, arranged to form a square array, in which there are coding areas and functional areas, and the symbols are surrounded by empty areas. 1. Symbol specification and version RR code has a total of 40 types of symbols. According to the standard, the numbers are from specification 1 to specification 40, specification 1 is 21*21 modules, specification 2 is 25*25 modules, and so on. The specification for version n has 21+4(n-1) modules per row and column. 2. Image finder graphics Generally speaking, the image finder graphics will be distributed in 3 positions, and the graphics are the same. These graphics are located at the top, upper right, and lower left corners of the symbol, respectively. The detection pattern is composed of three overlapping concentric squares. The module width ratio of these patterns is 1:1:3:1:1, respectively 7*7 dark modules, 5*5 light modules, 3*3 dark modules. Since it is extremely unlikely that similar patterns will be encountered elsewhere in this symbol, the three position detection patterns that make up the finder pattern can unambiguously determine the location and orientation of the symbol in the field of view. 3. Separator The width of the separator between the position of the detection graphic and the coding area is 1 module, all of which are composed of light-colored modules. 4. Positioning graphics The positioning graphics have columns and rows in vertical and horizontal directions, and the composition color is alternated between dark and light colors. Dark modules are at the beginning and end. 5. Correction graphic Three overlapping concentric squares form a correction graphic, which consists of 5*5 dark modules, 3*3 light modules and a dark module in the center. The number of correction graphics is determined by the version number of the RE code. The symbols of version number 2 and above all have correction graphics. The version number used in this design is 7. 6. area The coding area is specified in the design, and there are various symbols and characters in the coding area, including data code words, error correction code words, version information and format information. 7. Blank area Blank area is the area around the symbol, it has 4 modules wide area, the reflectivity of blank area is the same as the light color module

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