Symbol information reading apparatus

Details Symbol information reading apparatus Symbol information reading apparatus

1993-05-25

1996-02-06

Hajec, Donald T.

Registers

Coded record sensors

Particular sensor structure

235463, G06K 710

Patent

active

054897696

ABSTRACT:
A bar code symbol imaged by a two-dimensional imaging apparatus is stored in a frame memory. Based on the stored information, a position sensing section of a data processing apparatus senses position information units of at least two points from among position information units of four corners of the bar code image symbol projected on a photoelectric conversion surface of the two-dimensional imaging apparatus. On the basis of the sensed position information units, a slope sensing section estimates position information of the bar code symbol. Based on this position information, a reading section successively reads information of the bar code symbol from the frame memory. A decoding section decodes the read information to the original information.

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patent: 5245676 (1993-09-01), Spitz
patent: 5319181 (1994-06-01), Shellhammer et al.

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