Tilt adjustment for optical character recognition in portable reading machine
US8320708B2 · kind B2 · utility
60Cited by
29References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 1, 2005 |
| Grant date | Nov 27, 2012 |
| Priority date | — |
| Expiry date | Nov 6, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V30/10
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A reading machine that operates in various modes includes image correction processing is described. The reading device pre-processes an image prior to optical character recognition processing by detect distortion in an image of a page by measuring an extent to which page boundaries in the image deviate from a simple rectangular shape and correcting for the optical distortion by transforming the image to restore the page to a rectangular shape.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.