05189292 is referenced by 162 patents and cites 10 patents.

An optically encoded information bearing label containing a two dimensional array of data cells includes a finder pattern comprising a plurality of spots arranged in a predetermined geometric pattern substantially analogous to the predetermined geometric pattern of said two dimensional array of data cells. The finder pattern is detected by first scanning the image area to detect spots. The locations of detected spots are compared to the known geometry of the finder pattern in order to provide for rapid and reliable finding of the finder pattern and the information bearing label. Additionally, the detected finder pattern spots provide information for decoding the two dimensional data array in order to compensate for label magnification, tilt and other distortions.

Title
Finder pattern for optically encoded machine readable symbols
Application Number
7/606016
Publication Number
5189292
Application Date
October 30, 1990
Publication Date
February 23, 1993
Inventor
Donald G Chandler
Princeton
NJ, US
Eric P Batterman
Flemington
NJ, US
Agent
Allan Jacobson
Assignee
Omniplanar
NJ, US
IPC
G06K 9/36
G06K 19/00
G06K 7/10
G06K 19/06
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