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Method and apparatus for encoding and reading optical machine-readable data codes
Addis Ababa, Ethiopia.
Zürich, Switzerland.ORCID iD: 0000-0002-4929-1262
2010 (English)Patent (Other (popular science, discussion, etc.))
Abstract [en]

A method and apparatus for data encoding and optical recognition of encoded data includes generating symbols that represent data using angles (rather than linear dimensions as used for conventional bar codes). One embodiment uses spirals isocurves. Another uses parabolas isocurves. Methods for visually depicting such symbols, including symbols having gray values are disclosed. Methods for machine-based detection and decoding of such symbols regardless of their orientation relative to the machine is also disclosed.

Place, publisher, year, edition, pages
2010.
Keyword [en]
spiral codes, bar codes, rotation invariant, scale invariant, autonomous robots, object tracking
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:hh:diva-25867OAI: oai:DiVA.org:hh-25867DiVA: diva2:728934
Patent
US 8,757,490 B2 (2014-06-24)
Available from: 2014-06-25 Created: 2014-06-25 Last updated: 2017-09-27Bibliographically approved

Open Access in DiVA

fulltext(1569 kB)76 downloads
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Teferi Lemma, DerejeBigun, Josef
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CiteExportLink to record
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