Information embedding device and program for changing a number of points that exist on sides of a polygon
US7680296B2 · kind B2 · utility
1Cited by
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22Claims
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Key dates
| Filing date | Aug 18, 2004 |
| Grant date | Mar 16, 2010 |
| Priority date | — |
| Expiry date | Apr 12, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2201/0051
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Information embedding is performed by extracting vertices constituting a polygon from vector data, and changing a number of points that exist on sides of the polygon based on embedment information. Further, information reading is performed by extracting points existing on the sides of the polygon from the embedment information and embedded vector data, and by reading the embedment information according to a predetermined rule.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.