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1、三维彩码论文：三维彩码水印算法研究【中文摘要】 随着 3G 时代的到来和迅速发展，三维彩码作为新型 条码技术产品将会被越来越多的人所熟知，并将逐渐融入人们的生活 中。但随之而来的安全性问题也是值得关注的，有恶意的个人或团体 可能在没有得到作品所有者许可的情况下对其进行复制、传播甚至篡改,从而会引发版权纠纷和内容真实性认证等一系列问题。数字水印 技术是在不影响原始宿主数据可用性前提下，将一些标志信息嵌入到 数字产品中对其提供版权保护和数据完整性认证的一种技术。针对上 述问题和数字水印技术的特点，本论文通过对数字水印技术的研究来 探寻合适的数字水印算法以解决三维彩码的安全性问题，主要研究内容如下:
2、1.首先介绍了三维彩码的概念、技术特征、技术指标、核心 价值以及主要应用等，为解决其安全性问题打好理论基础。2.研究了 数字水印的基本理论、攻击分析以及典型算法等。进一步研究了 Arnold 置乱技术、奇异值分解、零水印技术、混沌理论以及脆弱水 印技术等,为下一步具体算法的设计做好技术支持。3.结合 Arnold 置 乱技术,提出了基于奇异值分解的三维彩码零水印算法。该算法利用 奇异值分解的稳定性来构造零水印，将每个分块的最大奇异值进行归 一化处理后与置乱后的水印图像异或生成零水印，通过将其存放在权 威注册中心来实现对三维彩码的版权保护。该算法有效地解决了数字 水印的不可感知性和鲁棒性之间的矛
3、盾，并能够抵抗多种常见攻击，具有较好的鲁棒性。4.提出了基于混沌系统的三维彩码脆弱水印算 法。该算法将三维彩码图像 R 和 G 分量的像素值经混沌系统迭代后映 射成另一个混沌系统的初值，经多次迭代后生成水印图像，然后将其 嵌入在 B 分量的最低 2 比特位中,使得水印具有良好的不可见性和安 全性。该算法能抵抗各种篡改攻击并实现了盲检测。【英文摘要】 Along with the coming and rapid development of 3Gera, as a new bar code tech no logy products, the color code will be wellkn
4、own, and gradually integrateinto people s lives.However, the subsequent security problems are also of concern, thereare malicious in dividualsor groups maycopy, dissem in ateor eve n tamper the color code without the permissi on of the owner,giving rise to a range of problems: copyright disputes and
5、 content authenticatio n.Digitalwatermark ing tech no logy isembedd ing some logo in formati on into digital products to providecopyright protection and integrality authentication, without affecting theavailability of original host data.Response to the above problems and thecharacteristics of digita
6、l watermark ing tech no logy, the thesis, based onresearch ing on digitalwatermark ing tech no logy, tries to findthe right digitalwatermarking algorithm to solve the securityissues for the color code, the major research work can be summarized asfollowing:1. We firstly introduce the basic kno wledge
7、 of the color code,such as con cept, tech nical characteristics, technical specifications, corevalues and applicati ons and so on. These kno wledge lay a theoreticalfoun dati on for sol ving the security issues.2. We study the basic theories,attack analysis, and typical algorithms of digital waterma
8、rk ing, and furtherstudy the Arnold scramble, SVD, zero-watermark, chaos theory andfragile watermark. These study work provide good tech ni cal support forthe desig n of specific algorithms.3. Combi ning with Arnold scrambli ngtech no logy, this thesis proposes a zero watermark algorithm based onSVD
9、 for color code image. The algorithm uses the stability of SVD to construct zero-watermark.? Each block of the largest sin gular value can beno rmalized value B, the n comb ine B and the scrambli ng watermarkimage with the XOR operati on to gen erate zero-watermark, the n store itin the Authority of
10、 the Registry to achieve color code copyright protection. ?The algorithm can effectively solves the digital watermark s thecontradiction between imperceptibility and robustness, and it is robustthat can resist many commorimage attacks.4. This thesis proposes afragile watermark algorithm based on chaotic system for color code image.The algorithm let the pixel values of R and G components of the colorcode, which were modulated by one chaotic system, map the initial values
三维彩码论文：三维彩码水印算法研究
