Code recognition method and system for rotating body
US6089455A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 19, 1998 |
| Grant date | Jul 18, 2000 |
| Priority date | — |
| Expiry date | Jun 19, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K2019/06243
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A code printing and recognition system for printing, reading, and decoding a code on an article while the article is rotated and conveyed along a predetermined path. The system includes a code printing unit for printing a code in a printing area of the article. The code printed on the article consists of a plurality of code signs, while the printing area is a portion of a circle having a predetermined radius and centered at the central point of the bottom surface portion or the top surface portion of the article. The printing area is divided into a plurality of concentric-circular portions, so that each code sign is encoded by placing a number of dots in a respective circular portion. The system also includes an image pickup unit for acquiring an image of the printing area of the article and a code recognition unit for detecting dots in each circular portion, counting the detected dots in each circular portion, and decoding each code sign on a basis of the dot count in a respective circular portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.