Machine vision verification
US9727781B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 31, 2013 |
| Grant date | Aug 8, 2017 |
| Priority date | — |
| Expiry date | Nov 6, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/00
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Embodiments of systems and methods for directly reading and verifying characters on a personalized document, are provided. A surface of the personalized document is illuminated independently or simultaneously by first and second light sources. The first light source has a ring shape, surrounds the personalized document in 360 degree, and transmits a grazing incident light to illuminate the surface of the personalized document. An incident light from the second light source is reflected by a beam splitter and illuminates the surface of the personalized document in a direction generally perpendicular to the surface. Light reflected from the surface of the personalized document in a direction generally perpendicular to the surface thereof is collected by a camera.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.