Methods and systems for estimation of document skew in an image
US8571313B2 · kind B2 · utility
1Cited by
16References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 22, 2010 |
| Grant date | Oct 29, 2013 |
| Priority date | — |
| Expiry date | Aug 29, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V30/1478
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Aspects of the present invention are related to systems and methods for determining a skew angle associated with a document image. According to a first aspect of the present invention, a rotation vector may be estimated for at least one layer in a vertical-edge buffer and a horizontal-edge buffer. According to a second aspect of the present invention, a rotation vector may be estimated directly from the vertical-edge buffer and the horizontal-edge buffer using a fixed-sized, progressively constrained histogram.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.