Research of Watermark Technology on High-density 2D Symbol
高密度图形码及其数字水印技术的研究

Through developing a kind of technology of High-density 2D Symbol, have realized that the printing of the information with higher density for information stored. Using it for solving the information store problem due to information increase of sign in a large-scale production flow. Through imbedding the watermark in the high-density 2D symbol ones it while having large data memory capacity, and it satisfying the information safety.