1. Wang, X.-F.: Information hiding techniques and applications, pp. 85–109. Mechanical Industry Press, Beijing (2001)
2. Feng, J., Lee, S.-L., Zhang, M.-L.: A DCT transform domain image water-marking technology. Computer Application Research 18(11), 73–74 (2001)
3. Wang, C., Cheng, Y.-M., Wang, Y.-X.: A block-based classification of the adaptive digital watermarking algorithm. Computer Engineering and Applications 38(21), 106–109, 141 (2002)
4. Hu, R., Xu, Z.: A block-based DCT transform and the embeded watermark scrambling algorithm. Micro-computer Information 2(17), 29–31 (2005)
5. Jia, S., Huang, R.H., Wen, X., Ye, W.: Scrambling and chaos-based encryption of digital image watermarking technology research. Journal of Beijing Normal University 41(2), 146–149 (2005)