Change search
ReferencesLink to record
Permanent link

Direct link
Method and apparatus for encoding and reading optical machine-readable data codes
Addis Ababa, Ethiopia.
Zürich, Switzerland.
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
Keyword [en]
spiral codes, bar codes, rotation invariant, scale invariant, autonomous robots, object tracking
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
URN: urn:nbn:se:hh:diva-25867OAI: diva2:728934
US 8,757,490 B2 (2014-06-24)
Available from: 2014-06-25 Created: 2014-06-25 Last updated: 2016-03-11Bibliographically approved

Open Access in DiVA

fulltext(1569 kB)55 downloads
File information
File name FULLTEXT01.pdfFile size 1569 kBChecksum SHA-512
Type fulltextMimetype application/pdf

Other links

Search in DiVA

By author/editor
Teferi Lemma, DerejeBigun, Josef
Electrical Engineering, Electronic Engineering, Information Engineering

Search outside of DiVA

GoogleGoogle Scholar
Total: 55 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 73 hits
ReferencesLink to record
Permanent link

Direct link