ABSTRACT
Digital watermarking is one of the popular solutions of protecting multimedia information, content authentication and Copyright protection. Generally, watermarking is applied on image, audio and video. Among them, digital image is the most popular content used in Internet. Digital watermarking techniques shall satisfy two properties. First, transparency, the embedded watermark does not visually distort the image; second, robustness, the watermark is dicult for an attacker to remove.
