一种基于人眼视觉特性和小波变换域的图像数字水印技术  

Image Digital Watermarking Technique Based on Human Visual System and Wavelet Transform Domain

作　　者：傅德胜[1] 孙文静[2] 

机构地区：[1]南京信息工程大学,南京210044 [2]南京理工大学,南京210094

出　　处：《计算机科学》2008年第11期203-206,共4页Computer Science

基　　金：江苏省产业技术研究与开发基金;苏发改高技发[2006]1106号

摘　　要：提出了一种基于人眼视觉特性和小波变换的彩色图像数字水印算法,该算法采用YIQ色彩空间进行水印的嵌入,嵌入前先对水印进行三次随机置乱处理,然后利用视觉系统的掩蔽特性对Y分量的小波系数进行分类,计算JND阈值并对小波系数进行量化,然后将置乱后的三个水印序列以不同强度嵌入到不同方向的小波系数中。实验结果证明,该算法具有很好的不可见性,且对常见的攻击具有较好的鲁棒性。A digital watermarking algorithm on color image based on human visual system and wavelet transform was proposed. This algorithm adopts YIQ color space to watermark embedding. The three-time random scrambling processing operations were made for the watermark before embedding. Then the wavelet coefficients of Y component were classified making use of the masking peculiarity of visual system. The calculation of JND values and the quantization of wavelet coefficients were made. Finally, the three scrambled watermarking sequences were embedded into wavelet coefficients of different directions by different intensities. Experimental results show that the proposed method not only has good imperceptibility but also has better performance in the aspect of robustness to common attacks.

关 键 词：数字水印嵌入 人眼视觉特性 变换域 置乱处理 JND阈值 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术] TN911.73[自动化与计算机技术—计算机科学与技术]