Method for image encoding
US6072888A · kind A · utility
37Cited by
12References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 24, 1999 |
| Grant date | Jun 6, 2000 |
| Priority date | — |
| Expiry date | May 24, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/327
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Plural-bit data is encoded in an image without leaving apparent evidence of image alteration. The image is represented by data elements (e.g., pixels) whose values are changed to effect the encoding. The changes are desirably effected in groups, e.g., pixel groupings 5-10 pixels in height and width, and in a manner calculated to keep the changes relatively inconspicuous.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.