一种利用小波多分辨分析实现的图像水印方案  

An Image Watermark Scheme Based on Wavelet Multiresolution Analysis

作　　者：石澄贤[1] 马金旺[1] 

机构地区：[1]常州大学数理学院,江苏常州213164

出　　处：《常州大学学报（自然科学版）》2014年第4期76-79,共4页Journal of Changzhou University：Natural Science Edition

摘　　要：一般的小波变换不具有几何不变性,因此,基于小波变换域上的水印抗几何攻击是一个富有挑战性的研究课题。提出了通过小波多分辨分析分解图像,对低频分量上的数据进行位分解,然后将水印嵌入到低频分量中,经小波逆变换恢复得到有水印的图像。实验结果表明该水印不仅具有较好的隐蔽性,且对诸如噪声干扰、图像滤波、几何变换、图像文件格式转换处理具有较好的鲁棒性。The wavelet transform does not has the geometry invariance,therefore,it is a challenge topic that image watermark resists geometry distortion based on wavelet transform region.In the paper,image was decomposed using wavelet resolution analysis.The data of low frequency component was decomposed byte.The information was embedded in low frequency component.The image of being watermark was reconstructed by wavelet reverse transform.It was demonstrated that watermark could well hide in visibility and the algorithm was robust against noise disturbance,filter,geometry transform,file format exchange in the experiment.

关 键 词：数字水印 多分辨分析 几何攻击 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]