A novel algorithm for multiple watermarks based on biorthogonal wavelets

A novel algorithm for multiple watermarks based on biorthogonal wavelet is proposed, which is defaulted by JPEG2000. The original image is not required for detecting the multiple watermarks. In this algorithm, the cryptography is well combined with the classic watermarks technology--methods of addition and quantification index modulation (QIM). When extracting the watermarks, different keys uniquely produce different watermarks. Many simulation experiments, such as JPEG compression, Gaussian noise, and image cropping, demonstrate the effectives and robustness of the proposed algorithm.