Research progress of applying digital watermarking technology for printing

This paper aimed to summarize the research program of applying digital watermarking technology fir printing, and find a kind of printing anti-counterfeiting technology which is difficult to copy, easy to identify, bottom cost and pollution-free. We summarized the research program of three stages that included generating and embedding watermarks, printing and scanning, extracting and detecting watermarks, was defined that divided from the process of digital watermarking technology. The results shown that, further studies could focus on the research on effects of the printing and scanning attacks on watermarks, so the relationship of invisibility and robustness to resist printing-scanning attacks could be balanced. Due to digital watermarking technology that was applied to digital images, it was necessary to research the fragile ability that prevents the secondary printing to establish the relationship between watermarking algorithm, printing process and parameters.