Research On Image Generation Algorithm Of Printing Anti-counterfeiting Based On Fractal And Chaos

With the development of information technology and the maturity of printing technology,the phenomenon of infringement such as fake and inferior is increasing day by day,which brings about the problem of security and anti-counterfeiting of printed matter.The use of special ink,paper,printing technology and other traditional printing anti-counterfeiting technology,has been able to achieve some anti-counterfeiting functions,but its production process is complex and processing costs are high,some of which can be cracked,for some of the information that is extremely in need of anti-counterfeiting protection is not very safe.Therefore,in many cases,anti-counterfeiting is carried out through layout design,and anti-counterfeiting designed by computer can effectively reduce the cost.Aiming at this problem,this paper designs an anti-counterfeiting image generation algorithm based on chaotic encryption and fractal principle.Through the principle of chaos and fractal,the algorithm generates anti-counterfeiting graphics defined by mathematical model,which can control the contour,texture,color and other contents of the graphics by input conditions.The generated images are affected by the mathematical model,the parameters are difficult to capture and are not easy to copy,and can play a good anti-counterfeiting effect.The first method is based on chaotic encryption and halftone information modulation visual encryption method and anti-counterfeiting shading generation method.Chaos scrambling encryption,chaotic diffusion encryption and halftone information modulation fusion are applied to visual encryption to realize information hiding and reproduction.The second method is to design a boundary control fractal tree filling algorithm based on recursive fractal principle,and a self-defined contour anti-counterfeiting hyperline shading generation algorithm.The fractal shading can be automatically generated and filled by recursive and iterative principles.The boundary range of fractal graphics can be determined according to the input contour image.Through experiments,this paper verifies the feasibility of anti-counterfeiting image generation method based on chaos and fractal,and has the characteristics of good anti-counterfeiting effect,low production cost and strong anti-replication.