Patent ID: 8126196
Filing Date: 2012-02-28
Classification: G06F,G06K

Abstract:
1. A method of imaging a coding pattern disposed on a surface of a substrate, said method comprising the steps of: (a) operatively positioning an optical reader relative to said surface and capturing an image of a portion of said coding pattern, said coding pattern comprising: a plurality of macrodots, said macrodots encoding one or more Reed-Solomon codewords, each codeword being comprised of first Reed-Solomon symbols and second Reed-Solomon symbols, wherein each of said first and second Reed-Solomon symbols is encoded by m macrodots irrespective of a Reed-Solomon symbol value encoded by said first and second Reed-Solomon symbols, each of said m macrodots occupying a respective position from a plurality p of predetermined possible positions, the positions of said m macrodots representing one of a plurality of said Reed-Solomon symbol values; wherein p>m; (b) sampling and decoding at least one Reed-Solomon codeword contained in said imaged portion; and (c) determining, using said at least one decoded codeword, at least one of: