Article marker and decoding method

Details Article marker and decoding method Article marker and decoding method

1994-03-01

1996-09-10

Hajec, Donald T.

Registers

Coded record sensors

Particular sensor structure

235494, G06K 710, G06K 196

Patent

active

055548415

ABSTRACT:
A graphical symbol encoding a numerical value may be accurately read even when placed on a non-planar surface. The marker is imaged with an inventive apparatus and analyzed using an inventive method which translates the graphical image into a unique number for article identification purposes. The marker in its preferred embodiment includes an outer ring having a continuous perimeter in one or more concentric data tracks disposed within this outer ring. A timing track is used to determine angular relationships about the center of the marker. Distances between points associated with the outer ring in a particular data track are used in conjunction with these angular relationships to locate a digitally encoded visual pattern associated with a particular data track, this pattern being used to store at least a portion of a numerical code used to identify each marker-bearing article.

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