数字水印技术在二维条码证件防伪中的应用  

Application of the Digital Watermarking Technique in 2-D Bar Code Certificate Anti-Counterfeit Systems

作　　者：陈哲[1] 张永林[1] 

机构地区：[1]暨南大学物理系,广东广州510632

出　　处：《计算机工程与科学》2006年第4期42-44,共3页Computer Engineering & Science

摘　　要：二维条码技术和数字水印技术都是防伪领域中的重要技术和研究热点。本文设计并实现了一整套基于PDF417二维条码的证件管理系统,在此平台基础上提出了对编进二维条码的照片信息采用基于DCT中频的数字水印技术的方法;同时,为了满足水印的鲁棒性,对水印采用了Arnold对称性变换。实验结果表明,该方法得到的水印图像有较好的透明性和鲁棒性,二维条码与数字水印技术的结合能够实现真正意义上的证件防伪。Both 2-D bar code and digital watermarking techniques are the important parts and research focuses in anticounterfeit fields. This text designs and realizes a whole set of certificate administration system based on PDF417. On this platform the method for encoded photos is proposed, which adopts the digital watermarking technique based on the DCT intermediate frequency. Meanwhile the Arnold transform is used for the robustness of watermarking. The experimental results indicate that the obtained watermarked images have good transparency and robustness. The combination of 2-D bar code and digital watermarking can realize real anti counterfeit certificates.

关 键 词：PDF417 ARNOLD变换 离散余弦变换 数字水印 防伪 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]