Primary localization method and system for QR codes
US10354111B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 13, 2018 |
| Grant date | Jul 16, 2019 |
| Priority date | — |
| Expiry date | Mar 5, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/10722
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A primary localization method for QR codes comprises: S1, binarizing pixel points of a received image containing a QR code; S2, partitioning the image into at least one mesh region; S3, recording the number of black pixel points in each mesh region, assigning the value 1 to mesh regions including black points, and assigning the value 0 to mesh regions not including black points; S4, marking the image as a non-object region; S5, scanning the non-object region line-by-line and column by column and marking the union of the mesh regions continuously with the value 1 for the first time in each line and the mesh regions continuously with the value 1 for the first time in each column as an object region; S6, judging whether the object region is the QR code region, if not, returning to step S5, and if yes, outputting the line numbers and the column numbers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.