Signal encoding outside of guard band region surrounding text characters, including varying encoding strength
US10424038B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 17, 2016 |
| Grant date | Sep 24, 2019 |
| Priority date | — |
| Expiry date | Sep 17, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/327
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present disclosure relates to advanced image processing and encoded signal processing. One claim recites an image processing method comprising the acts: receiving a digital representation of product packaging artwork, comprised of pixels; defining a guard band region surrounding text characters included in the artwork, in which a first region encloses the guard band region, and a second region encloses the first region; and altering the artwork to redundantly encode a machine-readable plural-bit payload across different regions of the artwork. The altering only alters the artwork outside of the guard band region, wherein a strength of the encoding has a first value in the first region, and has a second, stronger, value in the second region. Of course, other claims and combinations are described as well.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.