嵌入水印后的图像与原 始图像在视觉效果上几乎一样,只在亮度上稍有不 图6 　仿真实验结果 图7 　仿真实验结果 同,提取出的水印图像与原图像基本一致。-embedded watermark image with the original image in the visual effects are almost identical, only slight brightness on the map six simulation results Figure 7 with th