The watermark is generated from the characteristics of the images and is then embedded into the wavelet domain applying the low-dimensional chaos and mean quantization method.

• 第一种算法针对灰度图像设计,通过提取图像的特征信息作为水印信号,利用低维混沌系统,采用块平均量化的方法,在小波域实现水印的嵌入。