Method and apparatus for encoding and reading optical machine-readable data codes
2010 (English)Patent (Other (popular science, discussion, etc.))
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
spiral codes, bar codes, rotation invariant, scale invariant, autonomous robots, object tracking
Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:hh:diva-25867OAI: oai:DiVA.org:hh-25867DiVA: diva2:728934
US 8,757,490 B2 (2014-06-24)