Registers – Records – Particular code pattern
Reexamination Certificate
2004-07-19
2008-10-07
Lee, Seung H (Department: 2887)
Registers
Records
Particular code pattern
Reexamination Certificate
active
07431219
ABSTRACT:
Machine-readable coded data disposed on or in a substrate. The coded data includes a plurality of layouts, each of which has order n rotational symmetry. The layout encodes a first codeword formed from a sequence of n first symbols distributed at n locations about the center of rotational symmetry of the layout. In use, decoding the first symbols at each of the n orientations of the layout produces n representations of the first codeword, with each representation being a different cyclic shift of the first codeword so as to indicate the degree of rotation of the layout. The layout also encodes a second codeword formed from a number of second symbols, the second codeword being indicative of information regarding the respective layout.
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Dymetman, M., and Copperman, M., Intelligent Paper; In Electronic Publishing, Artistic Imaging, and Digital Typography, Proceedings of EP '98, Mar./ Apr. 1998, Springer Verlag LNCS 1375, pp. 392-406.
Lee Seung H
Silverbrook Research Pty Ltd
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