| 摘要 |
A method of imaging a coding pattern disposed on a surface of a substrate. The method comprises the steps of: (a) operatively positioning an optical reader relative to the surface and capturing an image of a portion of the coding pattern; (b) sampling and decoding a Reed-Solomon codeword contained in the imaged portion; and (c) determining, using the decoded codeword, a position of said reader, an identity of the substrate digital signature, and/or a fragment of an embedded data object. The coding pattern encodes Reed-Solomon symbols using mixed multi-pulse position modulation, with a higher number of Reed-Solomon symbol values available for redundancy symbols than data symbols. |
