Rule based and fuzzy logic method and apparatus for processing r

Details Rule based and fuzzy logic method and apparatus for processing r Rule based and fuzzy logic method and apparatus for processing r

1997-09-18

2000-01-11

Lee, Michael G

Registers

Coded record sensors

Particular sensor structure

235454, 23546226, G06K 710

Patent

active

06012640&

ABSTRACT:
A method and apparatus employs a production system-like rule based routine to process signals, such as reflectance signals produced from machine-readable symbols (e.g., bar code symbols). Relevant features data is extracted from each peak or valley in the signal, such as width, height, and relative size. The routine then uses the extracted data for each peak and valley with a set of rules to refine the reflectance signals. Under one or more iterations, the routine selects and resolves conflicting rules and applies resulting rules to process the signal. The processed signal can then be more readily decoded. The routine preferably processes a reflectance signal in portions, such as on a codeword-by-codeword basis. Under an alternative embodiment, a fuzzy inference engine provides sets of values for height, width and relative size. Therefrom rules are applied to determine a size of each peak and valley in the signal.

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