Research On Key Technology Of Halftone Trademark Information Hiding And Anti-counterfeiting

As a new technology of information storage,transmission and recognition,the two-di mensional code has inestimable value both in business and in foreign and military affairs.But the traditional two-dimensional code color is very monotonous,lack of beauty,so the attraction of consumers is limited,furthermore,the market needs to be able to produce hi gh-speed,a variety of sizes(from 4mm to 12mm)Two-dimensional code,but the reduced two-dimensional code can hardly be read,and the two-dimensional code itself does not have securiy,it is easy to copy.In view of the above problems,this paper uses the halftone information hiding techno logy,using a special network to record,the information carried by the two-dimensional cod e in the trademark,to overcome the two-dimensional code in the visual aspects of the defi ciencies,and to achieve the purpose of trademark anti-counterfeiting.Although many methods were used to realize the hiding of the information in the halft one screening,since the shape of the screening dots in the ordinary screening and the arrangement among the respective dots have a certain regularity,the related images after screening are prone to moire,therefore will make the image reproduction quality be affected to some extent.On the basis of further research on halftone screening theory and information hiding technology,this paper proposes a halftone screening information hiding technique based on the phase characteristics of space filling curve,and records the anti-counterfeiting information by using the unique screening texture of space filling curve.The anti-counterfeiting information to be hidden is characterized by different dot patterns and embedded in a manner of pseudo-random scrambling,which effectively avoids the phenomenon of low quality of the moire in the half-tone net,the visual effect of the screened images is good,At the same time as a result of its network of random irregularities,making the security of information security has been effectively enhanced.In the anti-counterfeiting information extraction stage,the anti-counterfeiting information carrier is extracted through pattern matching and the anti-counterfeit information isrecovered,so that the anti-counterfeiting information is effectively hidden and extracted.