Classification of two-dimensional barcodes [Buke printing]

Classification of two-dimensional barcodes [Buke printing]

At present, QR codes mainly include PDF417, Code49, Code16K, Data Matrix, Maxicode, etc. According to different code systems, they are mainly divided into two categories: linear stacking and matrix

(1) Linear stacked two-dimensional barcode. Also known as land area, rearrangement is based on the principle of barcode encoding. It narrows the height of a cone barcode and stacks it into multiple rows as needed to create a multimodal, layered two-dimensional barcode. This type of barcode is produced by stacking it vertically. Linear stacked two-dimensional barcodes inherit the characteristics of one-dimensional barcodes in terms of encoding design, inspection principles, and recognition methods. However, due to the increase in the number of rows, the recognition and decoding algorithms for rows are different from those of one-dimensional barcodes. Representative linear stacked two-dimensional barcodes include Codel6K, Code49, PDF41, etc.

(2) Matrix two-dimensional barcode. Also known as chessboard style two-dimensional barcode, this barcode is composed in the form of a matrix using image recognition. It is encoded in a rectangular space through the different distributions of black and white pixels in the matrix, and its data is encoded in the form of a two-dimensional space. At the corresponding element positions of the matrix, the appearance of "points" represents the binary "1", and the absence of "0" represents the binary "0". The arrangement and combination of points determine the meaning represented by the matrix code, where points can be square, circular, or other shaped points. Matrix code is a code system for automatic recognition of graphic symbols based on computer image processing technology, combinatorial coding principles, and other foundations. Representative matrix two-dimensional barcodes include AztecMaxicode, Datamatrix, Vericode, Softstrip, and QR code 4p

Classification of two-dimensional barcodes [Buke printing]