SVM-based Semi-fragile Holographic Digital Watermarking For Security Printing

In the competitive commodity economy, counterfeit and shoddygoods have become a nuisance, and the demand for anti-counterfeitingtechnology products also continued to grow, improve anti-counterfeitingtechnology content, to prevent counterfeit goods, it is particularlyimportant. The existing packaging printing anti-counterfeiting technologyhas not yet reached the security products "difficult imitation, easy toidentify, the end of the cost, pollution-free" performance requirements.The digital watermarking technology with high-tech, low-cost, greenfeatures to meet the performance requirements of security products used inpackaging printing security. But the market has not yet appeared on thepackaging and printing digital watermark technology-based securityproducts, due to the traditional digital watermarking technology applied tothe packaging and printing anti-counterfeiting, its lack of robustness andinvisibility. The hologram has not tear up, can effectively resist shear,rotation, and other geometric attacks; powerful support vector machinelearning, generalization and nonlinear approach, these characteristics of thehuman visual system has great similarity best watermark embeddingposition in the image can be determined adaptively. Introduction of digitalwatermarking technology, holographic technology applied to to solvetraditional digital watermark on the packaging and printing anti-counterfeiting insufficient, given the characteristics of the hologram andsupport vector machine, will be calculated to improve the robustness ofthe watermark, while the introduction of support vector machine toimprove the encrypted watermark information not visible with the security,and thus presents a digital watermarking technology for packaging printingsecurity.This paper firstly summarizes and discusses the research work coveredbasic theory and related technologies, including digital watermarkingtechnology, computing holographic technology and support vectormachines.Based on the above work, the design of a wavelet-based digitalwatermarking scheme holography, through computer simulation test simulates printing, scanning, etc. may be encountered during the attack,comparative analysis of holographic digital watermarking and traditionaldigital watermarking performance difference, the conclusions as following:the robustness to crop and invisibility of holographic digital watermarkingare better than the ones of traditional digital watermarking.In view of the one kind of watermarking robustness against rotationattack poor design an anti-print-scan digital watermarking schemehologram; printed images are used in view CMYK color mode, lookingfor the right watermark embedding channels designed holographic digitalwatermark color vector image print-scan simulation experiments, usingthe printer instead of printing packaging printing process simulation, inorder to compare different color channels of the watermark embeddingperformance. The experimental results showed that: The watermarkingscheme for small rotation angle of attack robustness has been significantlyimproved, but it is not visible, and security needs to improve.To further improve the watermark invisibility and security, in thewavelet domain anti printing-scanning holographic digital watermarkingscheme based on support vector machine algorithm encrypted holographicimage watermark information is embedded into packaging a specificlocation, thereby improved invisible watermark information encryptionand security.By printing-scanning experimental test of the proposed watermarkingscheme is robust and studied the host image, printing paper, printing lines,scanning accuracy, factors such as the watermark embedded in channelquality.In this paper, a method for packaging printing security of digitalwatermarking scheme, initially concluded that it can meet therequirements of anti-counterfeiting packaging and printing, the resultsachieved while working for the subsequent more comprehensive in-depthresearch work has laid a foundation.