Exploiting the excellent properties of the wavelet transform and some characteristics of Human Visual System(HVS),watermark is embedded into the middle frequency suband images of the original image in DWT domain.

• 利用人类视觉系统 (HVS)的特性 ,定义了视觉掩蔽函数 ,实现了水印在原始宿主图像小波域中的自适应嵌入 ,从而兼顾了水印的不可见性和鲁棒性。