置乱变换核心程序，是整个多重数字水印嵌入技术的重点，主要利用的是置乱变换的周期性，不同大小的图像有不同的周期，可以作为传输的密钥-Scrambling transform core processes, it is the multiple digital watermark embedding technology, mainly focused on the use of scrambling transformation is the cyclical nature of the imag

利用基于m 序列的扩频技术实现了 一种数字图像空间域的多重水印算法. 根据m 序列的伪随机特性和抗干扰性能, 使水印具有良好 的隐蔽性和稳健性.-A kind of mult iple digital image watermark embedding and detect ing alg orithm in spat ial domain w as r ealized by use of spr ead spec- tr um technology based on m se