Automatic detection of corners of an imaged document
US9736332B2 · kind B2 · utility
3Cited by
8References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 30, 2011 |
| Grant date | Aug 15, 2017 |
| Priority date | — |
| Expiry date | Apr 26, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/642
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method includes obtaining an image of a document against a background. A bounding box that bounds a region of the image that is distinguishable from the background is found. Coordinates of a plurality of points of the distinguishable region are found, each point being a point of the distinguishable region that is closest to each corner of the bounding box. The document is identified within the image as a region of the image whose corners are defined by the found coordinates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.