A Novel Watermarking Algorithm Based on Coupled Chaotic Map
一种基于共轭混沌映射的数字水印算法研究

Digital watermarking is widely used for a variety of multimedia applications, of which technique aiming at copyright protection is the most difficult as well as attractive. In this paper, a robust digital watermark algorithm based on coupled chaotic map is proposed. First, the original binary watermark is permuted by standard chaotic map, and the grey value of original image is masked according the coupled map. Then, the permuted watermark is embedded in the masked original image. Simulation results have demonstrated that this scheme is practical, secure and robust.