Coded data pattern having redundantly-encoded orientation
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United States of America Patent
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Jul 26, 2011
Grant Date -
Sep 24, 2009
app pub date -
May 31, 2009
filing date -
Dec 3, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A substrate having a coded data pattern disposed on a surface thereof. The coded data pattern comprises a plurality of target features defining a grid. The grid comprises a plurality of tags with neighboring tags sharing target features. Each tag comprises respective tag data encoded by a plurality of macrodot data elements contained in each tag. The macrodot data elements encode: a plurality of Reed-Solomon symbols, wherein a set of the symbols define a Reed-Solomon codeword; and an orientation of a layout of the tag data. The orientation is encoded a plurality of times in each tag.
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