Systems and methods for glare removal using polarized filtering in document scanning
US8174739B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 14, 2009 |
| Grant date | May 8, 2012 |
| Priority date | — |
| Expiry date | Aug 13, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/0434
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Systems and methods using polarized filtering for glare removal to improve the process of scanning documents, particularly bound documents with glossy content, are disclosed. The system may generally include a lighting source for illuminating a document, a lighting source polarizer attached to the lighting source to polarize light therefrom, a camera for capturing images of the document, and a camera polarizer attached to the camera. The camera polarizer and the lighting source polarizer may be positioned relative to each other so as to facilitate blocking light reflections causing glare off of the document resulting from the lighting source and arriving at the camera. The system may include multiple lighting sources, some or all of which may have a lighting source polarizer attached thereto.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.