Abstract: Most watermarking schemes focus on the robustness and invisibility with the problem of copyright protection remained unresolved, which are their initial motivation. In this paper, a watermarking scheme is proposed to provide effective copyright protection. By using a. novel method of generating watermark, the use of original data is no longer limited in resolving rightful ownerships. Moreover, blind and non-blind watermark detections have different applications. The robustness and invisibility are also improved. Both theoretical analysis and experimental results show its effectiveness against copyright attack and other distortions such as JPEG compression, Additive White Gaussian Noise (AWGN), image resizing and media filtering.