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US 2001/0026639 A1Published application
Character recognition
AssigneeDecuma AB
InventorsGunnar Sparr, Rikard Berthilsson
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AssigneeDecuma AB
InventorsGunnar Sparr, Rikard Berthilsson
Estimating the term…
A method of character recognition includes detecting a union of characters, preprocessing the union of characters, comparing the preprocessed union of characters with one or more template symbols, and applying a decision rule in order to either reject a template symbol or decide that the template symbol is included in the union of characters. Preprocessing the union of characters involves representing the union of characters as one or more curves, and parameterizing said curve or curves, and regarding various classes of transformation forming one or more shapes for the curve or curves. The comparing operation involves forming one or more geometric proximity measures, and determining for every shape the values of said geometric proximity measures between said shape and correspondingly determined shapes for the template symbols. Finally, applying a decision rule involves selecting one or more template symbols in consideration of the values.
A method for character recognition comprising the steps of:
A method as claimed in any one of the preceding claims, the union of characters being detected on a display on which it is written directly, characterised in that the step of detecting is carried out during the writing.
A method as claimed in any one of the preceding claims, characterised in that the step of applying a decision rule comprises determining acceptance limits of the values of said proximity measures and selecting a template symbol only if at least one value related to the template symbol is within said acceptance limits.
A method as claimed in any one of the preceding claims, characterised in that the step of applying a decision rule comprises carrying out a plausibility test of the selected template symbols.
Use of the method as claimed in any one of the preceding claims for verification or identification of signatures.
Dependencies are inferred from the claim text.