一种彩色图像硬拷贝全息水印算法  

Hardcopy Hologram Watermarking Based on Color Image

作　　者：吴清乐 WU Qing-le(Sichuan University of Science&Engineering College of Automation and Information Engineering,Yibin 644005,China)

机构地区：[1]四川轻化工大学自动化与信息工程学院,四川宜宾644005

出　　处：《电脑知识与技术》2021年第11期169-171,180,共4页Computer Knowledge and Technology

摘　　要：针对打印和扫描过程对彩色图像水印的攻击,提出了一种基于DWT变换的抗打印和扫描的全息水印算法。利用数字全息图,增强水印的鲁棒性。该算法对彩色图像的红色、绿色、蓝色分部分别进行离散小波变换(DWT),并在每个分部的垂直分部隐藏水印。算法可对水印进行盲提取,其不可见性显著提高,具有较强的抗模糊化、锐化、滤波、对比度变化、裁剪、噪声、JPEG压缩等一系列攻击,并且打印和扫描攻击后,对含水印图像进一步的校正,可清晰提取水印。该算法在商品包装防伪方面有着很好的实际应用价值。A hologram watermarking methods resistant to print-scan process is preposed.The digital hologram watermark is used.Each component of color image and the hologram were decomposed with discrete wavelet transform.High frequency components of the hologram were hidden in the vertical component of host image.The blind extraction of the watermark can be achieved,and the watermark is robust against cropping,noise,filtering,sharpening,contrast adjustment,JPEG compression.The watermark can be also extracted from print and scan attack.This algorithm has a very good practical application value in the anti-counterfeiting of commodity packaging.

关 键 词：数字全息 抗打印和扫描 数字水印 彩色图像 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]