Information embedding apparatus and information embedding method for adding information to document image by embedding information therein, information detecting apparatus and information detecting method
US7783073B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 16, 2006 |
| Grant date | Aug 24, 2010 |
| Priority date | — |
| Expiry date | Feb 20, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2201/0051
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In an information embedding apparatus, an image compositing portion selectively reads an embedding pattern from a plurality of types of the embedding patterns in accordance with an embedding information for a background of a document image. The image compositing portion further composites the read embedding pattern into the background of the document image in a document image data generated based on a document data and outputs the composite document image data. The embedding pattern includes a data dot placed at a position in accordance with the embedding information, a position dot placed at a position for instructing a reference position used for identifying the position of the data dot, and an assisting dot placed at a position for assisting the instruction of the reference position by the position dot.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.