Method of decoding a pattern-encoded coordinate
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United States of America Patent
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Apr 2, 2013
Grant Date -
Jul 28, 2011
app pub date -
Jan 27, 2010
filing date -
Jan 27, 2010
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method of decoding a coding pattern disposed on or in a substrate. The method comprises the steps of: (a) operatively positioning an optical reader relative to a surface of the substrate; (b) capturing an image of a portion of the coding pattern, the coding pattern comprising a plurality of square tags of length/identifying two-dimensional location coordinates; and (c) sampling and decoding x-coordinate data symbols within the imaged portion and y-coordinate data symbols within the imaged portion. The imaged portion has a predetermined diameter and is guaranteed to contain sufficient data symbols from each of the Reed-Solomon codes so that symbol errors are correctable in each of the codes during the decoding.
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