Image processing apparatus for extracting quadrangle area in image
US8125544B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 18, 2009 |
| Grant date | Feb 28, 2012 |
| Priority date | — |
| Expiry date | Aug 9, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G5/003
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image processing apparatus includes: a line segment detecting unit configured to detect vertical line segments and horizontal line segments in an image; a facing-lines candidate generating unit configured to generate vertical and horizontal facing-lines candidates from the vertical and horizontal line segments, the vertical and horizontal facing-lines candidates being candidates for pairs of facing lines configuring quadrangle areas in the image; a rectangle candidate generating unit configured to generate a plurality of pairs of one of the vertical facing-lines candidates and one of the horizontal facing-lines candidates, and to generate the quadrangle areas as rectangle candidates; and a calculating unit configured to calculate likelihood of each of the rectangle candidates based on a relationship between line segments constituting the vertical facing-lines candidates and the horizontal facing-lines candidates and the rectangle candidates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.