Digital watermarking is a new technique for digital multimedia copyright protection, the differences of the algorithms make the robustness and the imperceptibility of this technique very different.

• 数字水印是近年来出现的一种新的数字多媒体产品版权保护技术,用于嵌入水印的算法的不同使得该技术的不可见性,鲁棒性等特性大相径庭。