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2D barcode

Two-dimensional barcodes (2D code) allow the information density per area to be significantly increased compared to a one-dimensional barcode (1D code). In a data matrix code, for example, the information is coded very compactly on a square or rectangular area as a pattern of dots. When a data matrix code is read, two different bar widths are no longer defined clearly in their order, as in a one-dimensional barcode, but rather the arrangement of the equal-sized dots within the frame and in the matrix grid. The dots are white or black dots connected to each other or round dots with gaps in between. Further 2D codes: QR code, semacode, bee tag, vericode and VS code.