Jen-Sheng Tsai*, Win-Bin Huang, Jang-Hao Jiang, Chao-Lieh Chen, Jar-Shone Ker, and Yau-
Hwang Kuo, "A Robust Digital Image Watermarking based on Hessian-Affine Feature Detector,"
Proceeding of Multimedia and Networking Systems Conference (MNSC), Kaohsiung, Taiwan,
Dec. 2006.