Coding pattern with data elements encoding by pulse-position...

Registers – Records – Particular code pattern

Reexamination Certificate

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C235S487000

Reexamination Certificate

active

07604182

ABSTRACT:
A substrate having a coding pattern disposed on a surface thereof. The coding pattern comprises a plurality of target elements defining a target grid. The target grid comprises a plurality of cells, wherein neighboring cells share target elements. A plurality of data elements are contained in each cell. Tags are defined by a plurality of contiguous cells and each tag comprises respective local tag data encoded by a respective set of the data elements. The data elements encode data values by pulse position modulation, which facilitates low-pass filtering during image processing.

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Dymetman, M., and Copperman, M., “Intelligent Paper in Electronic Publishing, Artist Imaging, and Digital Typography, Proceedings of EP '98”, Mar./Apr. 1998, Springer Verlag LNCS 1375, pp. 392-406.

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