基于JND门限的小波域彩色图像数字水印算法  

A Color Image Watermarking Based on Wavelet Transform and JND Threshold

作　　者：高丕莲[1] 侯德文[1] 

机构地区：[1]山东师范大学信息科学与工程学院,山东济南250014

出　　处：《计算机与现代化》2008年第1期36-38,共3页Computer and Modernization

基　　金：山东省自然科学基金资助项目(Y2006G20)

摘　　要：提出了一种基于小波域的彩色图像数字水印算法,先将图像从RGB色彩空间转化到YIQ色彩空间,在YIQ模型中取其亮度分量Y,依据块能量的大小选取合适的嵌入点,结合JND自适应地嵌入水印,然后再反变回RGB色彩空间。理论分析与仿真结果表明应用该算法实现的水印具有很好的不可见性和鲁棒性。A new digital watermark algorithm for color images based on wavelet transform is proposed. The given color image is split into its three components in the YIQ color space firstly, then the luminance component Y is chosen and decomposed by one level DWT（ Discrete Wavelet Transform）. The corporate position is selected to embed the watermark with JND. Theoretical analysis and experiment results show that the watermark generated with the proposed algorithm is imperceptible and of great robustness.

关 键 词：数字水印 小波变换 块能量 图像置乱 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]