Method and apparatus for recognizing bar codes

Details Method and apparatus for recognizing bar codes Method and apparatus for recognizing bar codes

1977-07-06

1979-04-03

Kilgore, Robert M.

Registers

Coded record sensors

Particular sensor structure

235470, 3401463Z, G06K 714, G06K 913

Patent

active

041472950

ABSTRACT:
A bar code recognition system in which a threshold value for discriminating each bar of bar codes is automatically corrected. Bar codes representing information are constituted by a combination of wide and narrow bars to be scanned and converted into a rectangular signal having a time width proportional to the width of each bar. In proportion to the total time widths of the rectangular signal generated in each scanning cycle, the threshold value with reference to which each bar width is discriminated is determined to enhance the recognition operation of the system.

REFERENCES:
patent: 3596060 (1971-07-01), Tibbals
patent: 3676645 (1972-07-01), Fickenscher
patent: 3761685 (1973-09-01), Alpert
patent: 3778597 (1973-12-01), Vanderpool
patent: 3811033 (1974-05-01), Herrin
patent: 3838251 (1974-09-01), Herrin
patent: 3849632 (1974-11-01), Eckert
patent: 3857020 (1974-12-01), Higginbotham
patent: 3891831 (1975-06-01), Coles

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