Image rectification method
US8503813B2 · kind B2 · utility
4Cited by
4References
7Claims
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Key dates
| Filing date | Dec 22, 2010 |
| Grant date | Aug 6, 2013 |
| Priority date | — |
| Expiry date | Oct 21, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/20061
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An image rectification method includes the steps of: detecting edges in an image by using a Canny filter; performing Hough transform on the edges to detect lines in the image; selecting a candidate quadrangle from quadrangles formed by the detected lines; obtaining a transform matrix for transforming the candidate quadrangle to a rectangle by homographic transform; rectifying the image by using the transform matrix; and enhancing the rectified image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.