Skew angle determination
US9591176B2 · kind B2 · utility
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2References
24Claims
0Family size
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Key dates
| Filing date | Apr 6, 2012 |
| Grant date | Mar 7, 2017 |
| Priority date | — |
| Expiry date | Apr 6, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/3878
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The skew angle of a document image is determined or estimated. The skew angle is determined or estimated by examining patterns found within a Fast Fourier Transform of a subset of the document image. This technique exploits the internal structure of the document designs to allow fast and accurate skew angle estimation, including for arbitrary document fragments.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.