龚冬梅,顾济华,陈大庆,陈维霞.基于QR码的抗几何攻击数字全息水印[J].包装工程,2015,36(9):124-128,138.
GONG Dong-mei,GU Ji-hua,CHEN Da-qing,CHEN Wei-xia.Holographic Digital Watermarking Algorithm Against Geometric Attacks Based on QR Code[J].Packaging Engineering,2015,36(9):124-128,138. |
| 基于QR码的抗几何攻击数字全息水印 |
| Holographic Digital Watermarking Algorithm Against Geometric Attacks Based on QR Code |
| 投稿时间：2014-10-12 修订日期：2015-05-10 |
| DOI： |
| 中文关键词: QR码 数字全息 几何攻击 傅里叶-梅林变换 |
| 英文关键词: QR code digital holography geometric distortion Fourier-Mellin transform |
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| 中文摘要: |
| 目的 针对含水印QR码图像在扫描和解码过程中的几何攻击， 提出一种基于数字全息和傅里叶-梅林变换的数字水印技术。方法 以傅里叶-梅林变换构建几何不变域， 并利用全息图的不可撕毁性， 将水印以全息图的方式隐藏在QR码图像离散傅里叶变换中频幅度谱部分。结果 通过对比实验表明， 提出算法可以有效抵抗对含水印QR码图像进行的剪切、 缩放和旋转等几何攻击， 且算法简便， 嵌入信息量大。结论 在不影响QR码正确识别的基础上， 提出算法的鲁棒性和不可见性之间能达到较好的平衡。 |
| 英文摘要: |
| Targeting at the geometric attack problem of QR code watermarked images in the process of scanning and decoding, a new watermarking algorithm was proposed based on digital holography and Fourier-Mellin transform. Fourier-Mellin transform was used to construct geometric invariant domain, and holographic watermarking was embedded in the middle frequency of the QR code image′s DFT amplitude spectrum domain taking advantage of the strong anti-tear property of hologram. Comparative experiments showed that the algorithm proposed could effectively resist geometric distortion (rotation, scaling, clipping, and so on) of QR code watermarked images, and this algorithm was simple and had large amount of embedded information. The algorithm proposed in this paper could well balance between the robustness and the invisibility without affecting the correct identification of QR code. |
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