As an effective method to provide copyright protection for digital media

digital watermarking has drawn extensive attention recently.The paper proposes a new scheme of digital image watermarking based on the combination of discrete wavelet transform and discrete cosine transform.The experimental results demonstrate its better unification between the watermarking robustness and watermarking invisibility.Compared to the other image watermarking schemes

the watermarking with the proposed scheme is much robust against noise interference and commonly used image processing technique under the condition of same watermarking image quality.