基于JPEG压缩的水印算法  

A Digital-Watermark Algorithm Based on JPEG

作　　者：赵金凤[1] 李陶深[1] 兰红星[1] 

机构地区：[1]广西大学计算机与电子信息学院,广西南宁530004

出　　处：《计算机技术与发展》2006年第12期247-249,252,共4页Computer Technology and Development

基　　金：广西留学回国人员科学基金项目(桂科回0342001);广西科技攻关项目(桂科攻033008-9)

摘　　要：提出了一种基于JPEG压缩的盲水印算法。在算法中首先对水印图像进行纠错编码和置乱变换双重预处理技术,提高水印自身抵御攻击的能力。水印嵌入是在量化的过程中进行,并根据各块的特征确定嵌入强度,以保证嵌入图像后的视觉效果;水印的提取不需要原始图像的参与,实现了盲水印检测。实验结果表明:该算法有很好的抵御JPEG压缩的性能,对于噪声等也有较好的鲁棒性。A new blind digital - watermark algorithm is proposed in this paper. This algorithm uses correct - encode technique and scramhling technique in the pre- procession of the watermark to improve the capability of resisting attacks. The watermark is inserted parallel with qualification, and the embedding strength factor is adaptive for each selected image block to make sure the visualization of the image, The watermark does not need origin image so that can implement blind watermark detection. The experimental results show that it has good ability to withstand JPEG compression and better robust to noises.

关 键 词：数字水印 JPEG 置乱变换 量化嵌入 盲水印 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]