| US 7,336,800 B2 | ||
| Method and a device for detecting a watermark in digital data | ||
| Trevor Miranda, Uttar Pradesh (India); and Manindra Mohan, Uttar Pradesh (India) | ||
| Assigned to Indian Institute of Information Technology, Uttar Pradesh (India) | ||
| Filed on May 14, 2003, as Appl. No. 10/437,070. | ||
| Claims priority of application No. 563/DEL/2002 (IN), filed on May 16, 2002. | ||
| Prior Publication US 2004/0062394 A1, Apr. 01, 2004 | ||
| Int. Cl. G06K 9/00 (2006.01) | ||
| U.S. Cl. 382—100 [382/232] | 22 Claims |
| 1. A method for detecting watermarks in a digital data for the purpose of electronic copyright management system comprising the steps of: transforming the original, unwatermarked data, tagging the resultant components of the transformed, selecting significant tagged components in the said transformed data, transforming the suspected watermarked data, tagging the components in the transformed suspected watermark data, selecting the tagged components from the transformed suspected watermarked data corresponding to those selected as significant in the original transformed data, and comparing said two groups of selected tagged components to detect the presence of watermarks. |