Skew detection of text in a noisy digitized image
US6687421B1 · kind B1 · utility
24Cited by
6References
27Claims
0Family size
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Inventor
Key dates
| Filing date | Mar 17, 2000 |
| Grant date | Feb 3, 2004 |
| Priority date | — |
| Expiry date | Mar 17, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V30/1478
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for deskewing text is disclosed, in which a noisy digitized gray scale image is preprocessed by binarization, noise removal, and then by smearing in three patterns. A selected smeared image having minimal runs is sampled, and the resulting sampled image subjected to the Hough process using a search technique at two angular resolutions. A dominant text line is chosen from the output of the Hough process, and the image deskewed accordingly. The method is suitable for detecting skew at any angle, and is capable of detecting multiple skew text lines.
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