2D code, 2D code medium, 2D code generation method, 2D code generator and 2D code reader

摘要

PROBLEM TO BE SOLVED: To provide a configuration in which data can be added to a generated two-dimensional code later. SOLUTION: A data division code 31 has a plurality of specific pattern areas in which a specific pattern having a predetermined shape is printed, and a plurality of data blocks configured to be able to print a predetermined number of cells inside the code area 32. A data recording area in which data is recorded by using the data block and an error correction code recording area in which the error correction code is recorded by using a plurality of data blocks are provided. Then, among the plurality of data blocks, data is recorded in some data blocks according to the brightness of the printed cells, and cells are not printed in the remaining data blocks. [Selection diagram] FIG. 4