Bar code signal processing

Details Bar code signal processing Bar code signal processing

G - Physics

06

K

G06K 7/10 (2006.01)

Patent

CA 2596797

A low pass filter that approximates a Gaussian transfer function filters the analog bar code signal prior to digitization is used to smooth the bar code signal. The Gaussian filter has a transfer function that compensates for beam distortion close in to the bar code scanner. The smoothed bar code signal is provided to the digitizer to improve the efficiency with which the bar code signal can be digitized.

Un filtre passe-bas qui effectue l'approximation d'une fonction Gaussienne de transfert filtre le signal de code à barres analogique avant d'utiliser la numérisation pour lisser le signal de code à barres. Le filtre Gaussien comporte une fonction de transfert qui compense la distorsion du faisceau à proximité de l'entrée du dispositif de lecture des codes à barres. Le signal de code à barres lissé est envoyé au numériseur pour améliorer l'efficacité avec laquelle le signal de code à barres peut être numérisé.

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