Research On Encoding And Decoding System Of Two-Dimensional Bar Code And Its Realization

With the development of information technologies, automatic recognitiontechnologies have been widely used in various applications, and greatlyimprove work efficiency of industries. The bar code recognition technology,which is based on computer technologies, pattern recognition, imageprocessing, photo-electricity technologies and communication technologies, isan important approach to automatic input and recognition. It now becomes oneof the main computer automatic recognition technologies.The bar code can be categorized into two classes. One class is theone-dimensional bar code, and the other class is the two-dimensional bar code.The one-dimensional bar code is limited by its capacity, and thus it can onlyidentify merchandises and cannot describe merchandises. In contrast, thetwo-dimensional bar code solves the capacity problem. It has many advantages,such as large information capacity, good reliability, secrecy andanti-counterfeit. Besides, it can also be used to express text and imageinformation. Compared with other automatic recognition technologies, such as...