Method and system for auto-correcting perspective distortion in document images
US9171359B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 11, 2013 |
| Grant date | Oct 27, 2015 |
| Priority date | — |
| Expiry date | Dec 14, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V10/247
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Auto-correcting perspective distortion in document images is described. Line segments are identified in a distorted document image. Line segments are combined to form candidate lines. Candidate lines are grouped into a substantially horizontal group of lines and a substantially vertical group of lines. Linear equations are calculated to fit the substantially horizontal group of lines. Linear equations are calculated to fit the substantially vertical group of lines. The distorted document image is transformed based on two linear equations associated with two substantially horizontal lines and two linear equations associated with two substantially vertical lines.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.