Method for correcting fragmentary or deformed quadrangular image
US9773299B2 · kind B2 · utility
1Cited by
3References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 13, 2014 |
| Grant date | Sep 26, 2017 |
| Priority date | — |
| Expiry date | Oct 13, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T7/12
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a method for correcting a fragmentary or deformed quadrangular image. The method comprises five steps, i.e. detection of an edge point, elimination of an abnormal edge point, straight-line fitting, vertex calculation and image correction. The method for correcting a fragmentary or deformed quadrangular image is applied to a recognition method and a recognition system for papers, such as valuable documents, bills, identity cards, etc., and can rapidly conduct edge detection and tilt correction on images of valuable documents, bills or papers which are fragmentary or deformed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.