Record decoding system and method utilizing logarithmic techniqu

Details Record decoding system and method utilizing logarithmic techniqu Record decoding system and method utilizing logarithmic techniqu

1978-08-04

1980-04-22

Cook, Daryl W.

Registers

Coded record sensors

Particular sensor structure

250555, 360 42, G06K 710, G08C 906, G11B 509

Patent

active

041996771

ABSTRACT:
A bar code reader employs a microprocessor for decoding data contained in a bar code record and a logarithmic converter ahead of the microprocessor for providing to the microprocessor signals indicative of the logarithms of the widths of the scanned bars and spaces. The base of the logarithms used by the logarithmic converter is selected in a predetermined manner to maximize the resolution of the system for the particular microprocessor used, and to reduce the complexity of the system.

REFERENCES:
patent: 3784792 (1974-01-01), Dobras
patent: 3854036 (1974-12-01), Gupta et al.
patent: 3886521 (1975-05-01), Dobras
patent: 3887792 (1975-06-01), Williams
patent: 4058708 (1977-11-01), Sherer et al.

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