Symbol information reading apparatus

Details Symbol information reading apparatus Symbol information reading apparatus

1993-08-25

1995-06-06

Hajec, Donald

Registers

Coded record sensors

Particular sensor structure

G06K 710

Patent

active

054224705

ABSTRACT:
A bar code symbol imaged by a two-dimensional imaging apparatus is stored in a frame memory. A data processing apparatus estimates the position of each code in the bar code symbol projected onto the photoelectric conversion plane of the two-dimensional imaging apparatus and checks to see if the position of each code word is within the screen. Whether or not decoding is possible is determined by judging whether or not the number of code words estimated to be outside the screen has exceeded the number of codes restorable. Only when it is judged that decoding is possible, pieces of information on the bar code symbol are read in sequence from the frame memory to restore the original information.

REFERENCES:
patent: 5134272 (1992-07-01), Tsuchiya et al.
patent: 5138140 (1992-08-01), Siemiatkowski et al.
patent: 5155343 (1992-10-01), Chandler et al.
patent: 5296691 (1994-03-01), Waldron et al.
patent: 5304787 (1994-04-01), Wang
patent: 5319181 (1994-06-01), Shellhammer et al.

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