Method for embedding digital information in an image
US5859920A · kind A · utility
351Cited by
18References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 30, 1995 |
| Grant date | Jan 12, 1999 |
| Priority date | — |
| Expiry date | Nov 30, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/328
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of embedding digital data in a source image includes the steps of: a) generating a multi-level data image representing the digital data; b) convolving the multi-level data image with an encoding carrier image to produce a frequency dispersed data image; and c) adding the frequency dispersed data image to the source image to produce a source image containing embedded data. The data is recovered from the image by: a) cross correlating the source image containing embedded data with a decoding carrier image to recover the data image; and b) extracting the digital data from the recovered data image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.