Then, the maximum watermark amplitude was obtained by using the human vision system and image feature.At last, a simple amending polarity method was used to embed and extract the watermark.

• 在此基础上，结合人眼视觉模型和图像纹理特性，得出小波域的水印最大可嵌强度，用修改极性的方法进行水印的嵌入和提取。