Bar code symbol reading apparatus with double-reading preventing

Details Bar code symbol reading apparatus with double-reading preventing Bar code symbol reading apparatus with double-reading preventing

1993-02-17

1994-11-15

Pitts, Harold

Registers

Coded record sensors

Particular sensor structure

235463, 235472, G06K 710

Patent

active

053650484

ABSTRACT:
A comparing section compares the coordinates of the four corners of a bar code symbol newly detected by a bar code symbol detecting section and stored in a primary buffer, with the coordinates of the four corners of a bar code symbol having been detected and stored in a secondary buffer. If the coordinates of the newly detected bar code symbol differ from those of the detected bar code symbol, a control section causes a decoding section to decode the bar code symbol on the basis of image data stored in a frame memory. On the other hand, if not so, it is determined that the newly detected bar code symbol is invalid, thereby inhibiting decoding of the same to prevent double-reading.

REFERENCES:
patent: 4958064 (1990-09-01), Kirkpatrick
patent: 5019699 (1991-05-01), Koenck
X-English Abstract.
*-Partial translation.

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