Resolution gain on width modulated bar codes by use of angled sa

Details Resolution gain on width modulated bar codes by use of angled sa Resolution gain on width modulated bar codes by use of angled sa

1995-08-14

1998-07-07

Hajec, Donald T.

Registers

Coded record sensors

Particular sensor structure

235463, G06K 710

Patent

active

057773084

ABSTRACT:
A bar code imaging system provides increased resolution for accurately interpreting width modulated bar code symbols. The bar code imaging system comprises an imaging element adapted to receive light reflected from a bar code symbol and provide a two-dimensional image of the bar code symbol. The two-dimensional image is decoded into data representative of the bar code symbol. More particularly, the spacing between adjacent bar elements and adjacent space elements of said bar code symbol is measured by sampling along a diagonal line segment that intersects the adjacent bar elements. The diagonal sampling allows a greater number of pixels to be included in the measurement. If necessary, a perpendicular spacing measurement can be derived from the diagonal measurement.

REFERENCES:
patent: 5343028 (1994-08-01), Figarella et al.
patent: 5378881 (1995-01-01), Adachi
patent: 5489769 (1996-02-01), Kubo
patent: 5504322 (1996-04-01), Pavlidis et al.
patent: 5545887 (1996-08-01), Smith et al.

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