A Novel Watermarking Algorithm Based on Feature Points and SVD

In order to protect the copyright of digital productions, a novel watermarking algorithm based on feature points and singular value decomposition (SVD) is presented. By introducing the SIFT´s key points matching and geometric distortion estimation, the attacked watermarked image can be corrected and the watermark synchronization is realized. In this way, the feature regions detected by the Harris corner detector, which are used for information hiding, can be correctly detected even after signal processing and geometric attacks. The characteristic of U matrix in the result of SVD is finally applied for watermark embedding. The application of the proposed method makes the watermark capable of transparent hiding. Simulation results show that our method performs better than traditional methods under different attacks.