基于小波变换和置乱技术的二值水印新算法  

Novel binary image watermarking algorithm based on DWT and scrambling technique

作　　者：顾艳春[1] 韩国强[1] 沃焱[1] 龙建益[1] 

机构地区：[1]华南理工大学计算机科学与工程学院,广东广州510640

出　　处：《计算机工程与设计》2008年第15期4017-4020,共4页Computer Engineering and Design

基　　金：国家自然科学基金项目(60573019);广东省自然科学基金重点项目(05103541);广东省自然科学基金博士科研启动基金项目(05300198)

摘　　要：提出一种基于小波变换和置乱技术的二值水印新算法。将载体图像进行置乱变换和小波变换,将水印图像嵌入到低频系数中,嵌入时根据不同的能量范围设置不同的嵌入强度,且根据二值水印图像本身的特点对优值像素和劣值像素设置不同的调整因子。实验结果表明,该算法对加噪J、PEG压缩、裁剪、图像增强、滤波等处理都有很好的抵抗力。A novel binary image watermarking algorithm based on discrete wavelet transformation （DWT） and scrambling technique is proposed. The carrier image is first encrypted by scrambling technique and decomposed by means of the wavelet transform. Then, the binary watermark image is embedded into the DWT low frequency subband. The embedding strength varies from the energy. And different adjustment factor is used for different pixel values according to the watermark image itself. Experimental results demonstrate that the proposed algorithm is robust to some image degradation processes such as additive noise, JPEG compression, cropping, image enhancing and filtering.

关 键 词：信息隐藏 小波变换 置乱技术 数字水印 二值图像 人类视觉系统 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术]