Abstract: A blind image watermarking procedure based on teh zerotree wavelet is presented. A two-value image as a symbol of copyright protection is used, which is first preprocessed with a random location matrix. The embedding watermark data are obtained adaptively by the host image, and embedded into the zerotree wavelet of the host image. Two keys are used in the watermarking procedure: random location matrix and spread spectrum watermark matrix. The first one ensures the secuirty of watermarking procedure and the second one guarantees its robustness. Under the condition of no original host image, the experimental result demonstrates the robustness of our blind watermarking procedure against serveral image degradations and watermarking attacks.

Key words: blind watermarking, zerotree wavelet, image watermarking, spread specturm watermarking, copyright protection