Method for inserting and detecting electronic watermark data into a digital image and a device for the same
US6259801A · kind A · utility
84Cited by
3References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 21, 1999 |
| Grant date | Jul 10, 2001 |
| Priority date | — |
| Expiry date | Jan 21, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2201/0065
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An image is divided into blocks, and different electronic watermark data are embedded into every block using a DCT transformer (103), electronic watermark data inserter (104), and IDCT transformer (107). At that time, reference is made to an electronic watermark data insertion position table (105) and electronic watermark data table (106) which specify that which electronic watermark data is to be inserted into which block of the image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.