一种适用于QR码的数字水印方法  

A Digital Watermarking Algorithm for QR Code

作　　者：李黎[1] 王瑞玲[1] 

机构地区：[1]杭州电子科技大学计算机学院

出　　处：《杭州电子科技大学学报（自然科学版）》2011年第2期46-49,共4页Journal of Hangzhou Dianzi University：Natural Sciences

基　　金：国家自然科学基金资助项目(69773034);浙江省科技厅面上重点资助项目(C23004);浙江省教育厅资助项目(06447)

摘　　要：目前,二维条码技术结合数字水印是防伪领域的研究热点。该文提出了一种适用于QR码的数字水印方法,该方法是将数字水印嵌入QR二维条码当中,为了防止QR码图像在DCT域的溢出,对QR码进行了模糊和加噪预处理,将其频域DCT系数进行比较来嵌入水印。为了抵抗数字图像经打印扫描后的图像失真,将水印重复多次嵌入到图像的分块DCT中频系数中。水印提取用到两次模糊模式识别最大隶属度原则,无需原始的图像。The technology combined the 2D bar code with watermark is the hot topic of current research in security field.This paper presents a new digital watermark approach for the QR code.An invisible watermark is embedded in the QR code with the watermark technology,during the technology the DCT intermediate frequency coefficients is compared.In order to prevent QR code overflowing in the DCT domain of the image,to fuzzy and add noise in QR image.In order to resist image distortion after printing and scanning,the watermark is embedded repeatedly many times.The watermark is extracted using two maximum membership degree in fuzzy pattern recognition,not the original image.Experiment results have demonstrated the feasibility of the algorithm.

关 键 词：二维条码 数字水印 模糊 加噪 

分 类 号：TP309.2[自动化与计算机技术—计算机系统结构]