说明：  基于小波变换-奇异值分解的数字水印嵌入和提取，嵌入后的图像经过攻击后提取出来的相关系数可达到95 以上。
(Based on wavelet transform- the correlation coefficient singular value decomposition digital watermark embedding and extraction, image-embedded extracted after the attack can reach more than 95 .)