Code recognition method and system for rotating body

Details Code recognition method and system for rotating body Code recognition method and system for rotating body

1998-06-19

2000-07-18

Le, Thien M.

Registers

Coded record sensors

Particular sensor structure

235 911, 235494, 235469, 235456, 235464, G06K 710

Patent

active

060894555

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.

REFERENCES:
patent: 3418456 (1968-12-01), Hamisch et al.
patent: 3916160 (1975-10-01), Russo et al.
patent: 4250405 (1981-02-01), Ashcroft
patent: 4449042 (1984-05-01), Hampson et al.
patent: 5860679 (1999-01-01), Fukuda et al.
patent: 5926556 (1999-07-01), Douglas et al.

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