Two-dimensional code and its decoding method, and the printing publication using this two-dimensional code
US7997502B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 17, 2007 |
| Grant date | Aug 16, 2011 |
| Priority date | — |
| Expiry date | May 20, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V10/24
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The invention discloses a two-dimensional code and its decoding method and the printing publication for applying the two-dimensional code. Positioning dots located at four corners of code symbols in the two-dimensional code are larger than data dots. The code symbols are arranged repeatedly on the basement, including at least two identical code symbols. Adjacent code symbols share same positioning dots on their adjacent border. The decoding method comprises the following steps: reading the two-dimensional code by using a reading device, detecting the margin of each dot, obtaining an image of the closed border, selecting positioning dots; matching the positioning dots in a rectangle mode, grouping the data dots, reconstructing a matrix of data dots, and reducing codes according to an inverse process of codes layout in coding process of the two-dimensional code.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.