说明：  关于对hvx人体视觉水印的编写。有小波水印的全过程：分解、嵌入、重构、提取。人体视觉的体现：三大重要系数的利用
(On the preparation of hvx human visual watermark. There wavelet watermark the entire process: decomposition, embedding, reconstruction, extraction. Human visual manifestation: the use of three most important factors)