Methods and systems for embedding information into text of printable documents by altering one or more of the glyphs to change a shape of the glyphs
US10419636B2 · kind B2 · utility
2Cited by
0References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 8, 2017 |
| Grant date | Sep 17, 2019 |
| Priority date | — |
| Expiry date | Mar 8, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/3283
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Information can be encoded into text of a printable document or other printed material. The text includes glyphs, where each glyph corresponds to a text character. Additional information can be encoded into the text by altering one or more of the glyphs to change a shape of the one or more of the glyphs, so that each of the altered glyphs still corresponds to the text character to which the glyph corresponded prior to alteration and the altered glyph further contains a portion of the additional information encoded by the changed shape.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.