基于小波域数据块局部线性嵌入的数字水印

传统的数字水印对压缩攻击具有较好的鲁棒性，但对几何攻击仅仅在一定程度上具有稳定性，本文针对传统方法的不足提出了基于小波域数据块线性嵌入的数字水印。利用局部线性嵌入算法具有平移、旋转和缩放不变性，将水印信息序列嵌入到图像小波域数据块线性嵌入的重构系数中，而不将水印序列嵌入在图像像素值或变换系数中。因此本算法对裁剪攻击具有较强的鲁棒性，同时水印嵌入位置和嵌入强度均由原始图像信息分布决定。实验结果表明，本算法不增加嵌入水印序列信息量，降低了对原始图像的要求，提高旋转、平移、缩放和裁剪攻击的鲁棒性。

Digital Watermarking Based On Local Linear Embeding Of Wavelet Domain

Traditional digital watermark was robust against compression,but could barely remain the stability to resist geometric attack.In order to overcome this problem,a watermarking method based on wavelet domain data blocks was proposed.It was based on the transformation,rotation and scale invariant of the local linear embedding,and embedding the watermark sequence into wavelet domain data blocks' locally liner embedding reconstruction weight factor.The embedding location and intensity were decided by the origina...