Method and apparatus for decoding bar code images using multi-order feature vectors
CA 2186950 C · Owner: United Parcel Service Of America, Inc. · Inventors: Surka, Stefan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus for decoding a, pixel image representative of a bar code symbol. The bar code symbol is comprised of a plurality of encoded character values each of which corresponds to one of a plurality of prototype bar patterns, wherein each of the prototype bar patterns has a set of predetermined bar width feature values associated therewith. A set of bar width information estimates is determined from the pixel image. The set of bar width information estimates being representative of a character value stored in the bar code symbol. The set of bar width estimates is compared to a selected set of predetermined bar width feature values. Based on this comparison, it is determined …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed January 20, 1995 and granted June 6, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 20, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 20, 2017.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.