基于小波的彩色图像公开水印技术  

Wavelet-based public watermarking for color images

作　　者：张军[1] 彭宏[2] 王能超[1] 

机构地区：[1]华中科技大学计算机科学与技术学院 [2]华南理工大学计算机科学与工程学院

出　　处：《华中科技大学学报（自然科学版）》2003年第6期86-88,共3页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：广东省自然科学基金资助项目 (0 2 0 199);广东省教育厅自然科学基金资助项目 (Z0 2 0 42 )

摘　　要：提出了一种新的彩色图像公开水印技术 .首先计算彩色图像的红色与绿色分量的加权平均图 ,然后分别对加权图和蓝色分量图作小波分解 ,最后通过对这两者的粗尺度子图之差进行模运算将图案水印嵌入到蓝色分量图的低频带中 (粗尺度子图 ) .实验结果表明 ,该方法具有很好的不可感知性以及对通常图像处理的稳健性 。A public watermarking for color images was proposed. Ac cording to the proposed method, the weighted image of the red and the green comp onent of the color image was computed. The weighted image and the blue component image of the color image was decomposed by wavelet transform. The watermark bit s were embedded into the low frequency band (coarse level) of the blue component by the modulo based on the difference between their coarse level subimages. The experiment results showed that the proposed technique has very good imperceptib ility and high robustness to common image processing operation. The performance is superior to that of other methods in the literature.

关 键 词：彩色图像 公开水印技术 小波变换 模运算 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]