System and method for document orientation detection
US8712188B2 · kind B2 · utility
6Cited by
6References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 28, 2011 |
| Grant date | Apr 29, 2014 |
| Priority date | — |
| Expiry date | Mar 7, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/40062
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In one embodiment, a method of detecting document orientation includes capturing a document image, binarizing each subimage of the document image to retain textual content and eliminate graphic and noise content from the document image, detecting portrait or landscape orientation based on values computed from strip-based projection profiles, and detecting up or down text orientation based on a text-asymmetry ratio computed from strip-based projection profiles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.