Issued Patents 2004
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6748533 | Method and apparatus for protecting the legitimacy of an article | Qibin Sun, Huijie Deng | 2004-06-08 |
| 6707933 | Face direction estimation using a single gray-level image | Roberto Mariani | 2004-03-16 |
| 6678389 | Method and apparatus for embedding digital information in digital multimedia data | Qibin Sun, Huijie Deng | 2004-01-13 |
| 6674861 | Digital audio watermarking using content-adaptive, multiple echo hopping | Changsheng Xu, Qibin Sun, Kai Xin, Haizhou Li | 2004-01-06 |