Dr. Li Li from Hangzhou Dianzi University experienced six years of research and development and a large number of experiments. He has developed a digital watermark embedding and extraction software system that is currently applicable to a variety of information carriers. The digital watermark embedding and extraction method has applied for software copyright and invention patent.
The digital watermarking system can not only realize the digital watermarking information in the digital information, but also can retain the digital watermark information after the digital information is printed or printed out to the paper media, and can be passed through a scanner, a digital camera or a special device. Accurate extraction.
The digital watermark embedding method has the characteristics of good concealment and resistance to various attacks, and can be widely applied to digital information copyright protection, print anti-counterfeit, traceability of information sources and Other fields, such as trademarks, product packaging, books, magazines, certificates, certificates. Prints, stamps, magnetic cards, publications, audio and video products cover, currency coupons, tickets, documents, advertisements, calendars calendars, business cards, passports and other printed matter security, its economic and social value is very large.
The system extends the digital watermark onto paper media, which can not only print out but also print out; not only can be applied to four-color offset printing, but also to spot color printing; not only can be output on inkjet printers, but also on laser printers. On the output, with a wide range of adaptability. Existing high-resolution scanners, digital cameras, color copiers, etc. cannot be copied and copied, and they have good print anti-counterfeiting capabilities.
The use of the system does not require additional investment in fixed assets and the use of special materials. It does not require changes to the printing process and does not require additional printing costs. It can be seamlessly combined with existing anti-counterfeiting technologies to achieve better anti-counterfeiting effects.
Reprinted from: Zhejiang Online