A robust image watermarking scheme based on a trusted third party
LI Shao-fa · Jisuanji gongcheng yu sheji · 2003
Image watermarking techniques are mainly used for image copyright protection. A robust image watermarking scheme based on a trusted third party is proposed. The method has two main virtues. First, the watermark used in the proposed scheme is the same type as the original image, e.g. gray level images. Second, the proposed scheme meets the requirements for wat-ermarking techniques. Because a trusted third party is introduced, users can't perceive or break the watermark from the image. Moreover, the watermark is robust against attacks by various image altering algorithms, such as filtering, lossy compression, rotation etc.