Optical mark reader
US9594937B2 · kind B2 · utility
2Cited by
22References
33Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 24, 2015 |
| Grant date | Mar 14, 2017 |
| Priority date | — |
| Expiry date | Feb 24, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K19/06178
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Each data point within a two-dimensional code can be represented by a distribution of spots. Each spot can be made small enough to be invisible to the human eye so that the two-dimensional code can be invisible on or within transparent or nontransparent materials. The spots can be spaced at a large distance to increase the signal-to-noise ratio for an optical code reader. A code reader can be adapted to read the spots and determine the data points.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.