Method and apparatus for data hiding in printed images
US6411392B1 · kind B1 · utility
109Cited by
8References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 15, 1998 |
| Grant date | Jun 25, 2002 |
| Priority date | — |
| Expiry date | Apr 15, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB42D25/29
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A technique for embedding a mark in an a printed image allows its interpretation by an inexpensive printing system. Values of a characteristic parameter are altered in a portion of the host image confined to a thread, i.e. a region of contiguous points in the image, small enough to be included in the print space treated by the printer in a single pass of the printing head.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.