Patent · US Active

System for decoding two dimensional code and method thereof

US9135489B2 · kind B2 · utility

3Cited by

3References

31Claims

0Family size

Assignees

Inventors

Ling Zhang · Beijing, CN
Chao Guan · Beijing, CN
Zhenhua Liu · Beijing, CN
Gezhang Liu · Beijing, CN
Wanyi Che · Beijing, CN

Key dates

Filing date	Dec 12, 2013
Grant date	Sep 15, 2015
Priority date	—
Expiry date	Dec 12, 2033

Classification

Technology area (CPC G)Physics
CPC primaryG06K7/1478
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

Method and system for decoding a two dimensional code is disclosed. In the binarization process of a two dimensional code image, through performing a dividing operation on the two dimensional code image, each block region has a different grayscale threshold. For each block region, whether a pixel in the block region is determined as black or white is not solely based on the grayscale value of the pixel itself, but also an average grayscale value of a predetermined area set for the block region where the pixel locates. When the predetermined area in which the block region locates has a larger grayscale value as a whole, the grayscale threshold corresponding to the block region may become larger, and vice versa.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.