Method and system for determining edge line in QR code binary image
US9087253B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 10, 2013 |
| Grant date | Jul 21, 2015 |
| Priority date | — |
| Expiry date | Dec 10, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/1417
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Method and system for determining QR code binary image is provided. Locating lines on which edges of the QR code locate are determined according to location information of locating points within the QR code image and distances between the locating points to edges of the QR code. Distances may be used to obtain locating lines on which edges of the QR code locate, with relatively smaller errors. When a QR code image is distorted, it generally bulges outward. The position of a determined locating line is within the interior of the QR code image, and an actual edge of the QR code partly overlaps with the locating line and partly locate on external side of locating line. Edge points on external side of a locating line are detected along the direction of the locating line and then are connected to form an edge line of QR code.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.