一种使用JND和零树编码的彩色图像水印算法  

A DIGITAL WATERMARKING ALGORITHM FOR COLOR IMAGES BASED ON JND AND ZEROTREE CODING

作　　者：杨海涛[1] 郑洪源[1] 丁秋林[1] 

机构地区：[1]南京航空航天大学计算机科学与技术学院,江苏南京210016

出　　处：《计算机应用与软件》2012年第6期278-281,共4页Computer Applications and Software

摘　　要：提出一种将彩色水印图像嵌入到原始彩色载体图像中的数字水印算法。对置乱后的水印图像和载体图像进行不同级别的小波变换,按照频带重要性从低频到高频子带嵌入水印,并在子带内部根据零树编码方法,选择重要的小波系数嵌入;其中嵌入强度由临界可见误差门限(JND)决定。通过实验验证,所提的算法具有很好的隐蔽性和鲁棒性。The authors propose an algorithm by embedding a color digital watermark into an original color image.Wavelet transform of different levels is applied to the scrambled watermark and the original image.The coefficients of the watermark are embedded in the subbands of the color image from lower frequency to higher frequency according to their significance;at the same time,within a subband,the significant coefficients are selected for embedding in terms of their importance with zerotree coding.The embedding intension is determined by JND（just noticeable difference） threshold.Experimental results show that the proposed algorithm bears good invisibility and robustness.

关 键 词：彩色数字水印 小波变换 零树 临界可见误差 

分 类 号：TP301.6[自动化与计算机技术—计算机系统结构]