用于图像认证、定位和恢复的半脆弱数字水印的设计与实现  

THE DESIGN AND IMPLEMENTATION OF SEMI-FRAGILE WATERMARKING FOR IMAGE AUTHENTICATION,LOCATION AND RECOVERY

作　　者：刘德春[1] 张颖颖[2] 

机构地区：[1]南阳理工学院,河南南阳473004 [2]南阳师范学院,河南南阳473061

出　　处：《南阳理工学院学报》2017年第2期1-5,共5页Journal of Nanyang Institute of Technology

摘　　要：提出了一种基于小波变换的半脆弱数字水印的图像篡改检测及恢复算法。该算法采用二维离散小波变换,将小波低频系数经过处理应用于图像认证和修复,并使用混沌映射和置乱算法保证算法的有效性和安全性.实验表明:该方案安全性高,对常规篡改可进行精确定位,并能较好地实现自恢复。The algoritlim of semi-fragile digital watermarlsing based on wavelet transform is proposed for image tamper detection and re-covery. The algoritlim adopts the two-dimensional discrete wavelet transform, applies the processed wavelet low frequency coefficients to image authentication and recovery,and uses the chaotic mapping and scrambling algorithm to ensure the effectiveness and safety of thealgorithm. Experimental results showthe high safety of the algorithm, the accuracy of conventional tamperof self-recovery.

关 键 词：半数字脆弱水印 小波变换 混沌映射 置乱算法 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]