Creation and decoding of two-dimensional code patterns

Details Creation and decoding of two-dimensional code patterns Creation and decoding of two-dimensional code patterns

2006-11-07

2006-11-07

Stcyr, Daniel (Department: 2876)

Registers

Coded record sensors

Particular sensor structure

C235S010000

Reexamination Certificate

active

07131588

ABSTRACT:
A method of utilising a two-dimensional code pattern is disclosed comprising the steps of encoding (5) the structure of phase perturbations (including singularities) on a continuous phase map structure as an encoded representation of the code information. The codes can then be impressed or printed on other media such labels, documents, envelopes etc. A method of demodulating (10) the aforementioned codes and determining a phase map structure for the code including the detection of embedded phase singularities and decoding the embedded information, is also disclosed.

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M. Kujawinska, “5 Spatial Phase Measurement Methods”, Interferogram Analysis: Digital Fringe Pattern Measurement Techniques, 1993, pp. 141-193.
Bone et al., “Fringe-pattern anaylsis using a 2-D Fourier transform”, Applied Optics, May 15, 1986, vol. 25, No. 10, pp. 1653-1660.

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