A Color Image Watermarking Algorithm Based on Chaotic Encryption and Zerotrees Coding Idea

In order to insure the watermarking embedding merits,such as high speed,easy realization,etc.and improve its safeness and robustness,a meaning binary image is encrypted quickly based on chaos theory because of chaos system merits.Then the wavelet coefficients are arrayed by their importance and the most important number L coefficients,the part which is most important to the human vision,is selected as the spot which should be embedded by watermarking.At last the watermarking is embedded in the coefficient bit plane and the carrier image containing the watermarking is acquired by the retransform.The experimental result proves that this algorithm has merits such as high efficiency,strong ability to resist compression,better robustness,etc.