Road sign recognition method and system
US10990835B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 23, 2019 |
| Grant date | Apr 27, 2021 |
| Priority date | — |
| Expiry date | Jul 28, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/30248
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Road sign recognition method and system. The method includes performing HSV space color threshold binarization on a single frame image in a road image, obtaining a sign connected region through localization; calculating a length-to-width ratio of the sign connected region to eliminate a false target, calculating a distance from a contour edge to a target center position in the sign connected region, obtaining a target localization region with a circular contour of the sign connected region; intercepting a corresponding grayscale image and calculating an average grayscale value of the grayscale image, performing binarization on the grayscale image in the target localization region, obtaining a binary image of each target localization region; extracting connected regions in the binary images, sorting the connected regions according to coordinates; calculating and determining number or character inside the target localization region by using a neural-network mode recognition algorithm; and calculating confidence.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.