基于提升方案小波和混沌映射的盲水印算法  

Blind watermarking algorithm based on lifting scheme wavelet and chaotic mapping

作　　者：陈东方[1] 张有清[1] 

机构地区：[1]武汉科技大学计算机学院,湖北武汉430065

出　　处：《计算机工程与设计》2008年第20期5372-5375,共4页Computer Engineering and Design

摘　　要：数字水印技术是多媒体信息安全领域的一个重要研究课题。在研究HVS对图像掩蔽特性的基础上,提出一种利用提升方案小波对载体图像进行多个金字塔分解,结合纹理块的确定方法选取小波系数,提高水印信息的嵌入量,结合新的混沌方法对水印信息进行映射加密嵌入。嵌入水印时,先对水印信息进行扩频,然后利用新的量化运算方法嵌入水印。实验结果表明,该算法简单高效,增强了水印信息的安全性,在抗JPEG压缩、锐化、扭曲变形、各种剪切等攻击上有很好鲁棒性,同时具有较好的透明性。Digital watermark technique is one of the most active research topics in the safety field of multimedia information. On the basis of research on invisibility of HVS for the image, a watermark algorithm is proposed based on pyramid decomposition of lifting scheme wavelet methods, with the texture block wavelet coefficients. The watermark spread spectrum, and then is embedded by means of quantization. The simulation results show that the method is simple and effective with high capacity of watermark. It has good imperceptibility. And it is roust against normal image processing and kinds of attacks, for example JPEG compression, local deformation and several cropping.

关 键 词：提升小波 金字塔分解 纹理块 量化 扩频 

分 类 号：TP391.72[自动化与计算机技术—计算机应用技术]