一种基于DWT-SVD算法的DSP数字水印系统设计  

Design of DSP Digital Watermarking System Based on DWT-SVD Algorithm

作　　者：于鑫[1] 杨红梅[2] 王世臣[1] 张晴晴[2] 

机构地区：[1]安徽四创电子股份有限公司,合肥230088 [2]山东科技大学信息科学与工程学院学院,山东青岛266590

出　　处：《计算机测量与控制》2013年第2期483-486,共4页Computer Measurement &Control

基　　金：山东省高校科技计划项目(J10LG24);山东省优秀中青年科学家科研奖励基金项目(BS2010DX026);青岛经济技术开发区重点科技发展计划项目(2010-2-43);中国博士后基金项目(20110491613)

摘　　要：文章给出了一种基于DWT-SVD的抗几何攻击的彩色图像水印算法,该算法将水印信息嵌入在载体图像CIEL*a*b*颜色模型的亮度空间中,并对载体图像进行打印机输出和各种攻击处理;然后利用TMS320DM642硬件平台实时采集含水印图像,进行水印的检测与提取;最后利用Matlab对采集的载体图像和提取的水印图像进行性能评估;实验结果表明,本水印算法对抵抗打印扫描过程中的几何攻击具有很好的鲁棒性,而且系统完成了水印算法的DSP硬件实现,该算法将有利于推动数字水印技术的理论研究与应用推广的发展。This paper puts forward an image watermarking algorithm which can resist geometrical attacks based on the DWT and SVD theory. This algorithm embeds the watermark information into the brightness space of the carrier image＇s CIEL ＊a＊b＊ color model and it does some attack process to the carrier image and prints it out. Then this system captures the watermarked image real--time by use of the TMS320DM642 hardware platform and then does watermark detection and extraction. Last, it evaluates quality of the collected image with watermarked and the extracted watermark image on Matlah. Experimenta1. results show that, this watermarking algorithm has excellent ro bustness to resist geometric attacks, and completes the realization of this algorithm in DSP hardware platform. This system will greatly accelerate the research of digital watermarking technology theory and the development of application and extension.

关 键 词：数字水印 嵌入式系统 抗几何攻击 奇异值分解 

分 类 号：TH873.7[机械工程—仪器科学与技术]