Methods and systems for text detection in mixed-context documents using local geometric signatures
US7043080B1 · kind B1 · utility
87Cited by
15References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 21, 2000 |
| Grant date | May 9, 2006 |
| Priority date | — |
| Expiry date | Apr 11, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V30/413
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Embodiments of the present invention relate to methods and systems for detection and delineation of text characters in images which may contain combinations of text and graphical content. Embodiments of the present invention employ intensity contrast edge detection methods and intensity gradient direction determination methods in conjunction with analyses of intensity curve geometry to determine the presence of text and verify text edge identification. These methods may be used to identify text in mixed-content images, to determine text character edges and to achieve other image processing purposes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.