基于纠错编码的空频域结合的多功能水印研究  

A Research of Multi-function Watermark Based on Correct-encode in Spatial Frequency Domain

作　　者：林军海[1] 唐向宏[1] 何涨桔[1] 

机构地区：[1]杭州电子科技大学通信工程学院,浙江杭州310018

出　　处：《杭州电子科技大学学报（自然科学版）》2012年第5期143-146,共4页Journal of Hangzhou Dianzi University：Natural Sciences

摘　　要：该文提出一种基于汉明码编码,利用空频域结合的多功能图像水印算法。算法首先对载体图像进行离散小波变换,将鲁棒性水印嵌入到低频子带的对角线子带中;然后利用图像的位平面与鲁棒水印进行汉明码编码,将生成的校验码嵌入图像的最低有效位,实现脆弱水印的嵌入。实验仿真结果表明,该算法中的鲁棒水印对一些常见攻击具有较好的抗攻击性,脆弱水印具有较好的敏感性,能较好地实现图像的篡改定位和修复。In this paper,a watermark algorithm of multi-function watermark based on Hamming code in spatial frequency domain is proposed.Decomposed the original digital image into DWT,and embedded robust watermark into the diagonal-frequency of the low-frequency;then the bit plane of image and robust watermark was picked up to generate correct code,and embedded the correct-encode into the LSB of image.Experimental results show that the robust watermark possesses good robustness to common attacks,the fragile watermark has a good sensibility,and it can detect and recover the tampered areas effectively.

关 键 词：汉明码 离散小波变换 位平面 最低有效位 修复 

分 类 号：TP306.1[自动化与计算机技术—计算机系统结构]