一种改进的基于小波域的图像盲水印算法  

A Modified Blind Watermarking Algorithm based on DWT

作　　者：张莹雪[1] 

机构地区：[1]华侨大学信息与科学工程学院电子系,福建泉州362021

出　　处：《信息安全与通信保密》2009年第9期143-145,共3页Information Security and Communications Privacy

摘　　要：论文提出一种改进的基于小波域的图像盲水印算法。此算法根据人类视觉特性,提出在宿主图像小波域二级分解的子带LH2、HL2以及LL2的适当系数分别嵌入水印,以达到优势互补。水印的嵌入采用量化调制的方式,使水印实现盲提取。实验结果表明:此方案算法简单,量化间隔易调,具有良好的不可见性和鲁棒性。The paper proposes with a new blind watermarking algorithm based on discrete wavelet transform（DWT）. According to visual masking effect of human visual system, the proposed algorithm embeds to watermark into some big coefficients of sub-bands LH2, HL2 and into some small coefficients of sub-band LL2 in the discrete wavelet domain of an image. In order to extract the watermark without using the original image, the embedment of the watermark is implemented by using quantized modulation. The experimental results indicate that the proposed algorithm, with adjustable quantization interval, is simple and robust to certain common distortions.

关 键 词：水印 小波变换 量化调制 盲提取算法 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]