Bar code reading method

G - Physics – 06 – K

Patent

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Details

G06K 9/18 (2006.01) G06T 7/00 (2006.01)

Patent

CA 2675689

A method of recovering a waveform representing a linear bar code, the method including the steps of: moving a sensing device relative to the barcode, said sensing device having a two-dimensional image sensor; capturing, using the image sensor, a plurality of two- dimensional partial images of said bar code during said movement; determining, from at least one of the images, a direction substantially perpendicular to the bars of the bar code; determining, substantially along the direction, a waveform fragment corresponding to each captured image; determining an alignment between each pair of successive waveform fragments; and recovering, from the aligned waveform fragments, the waveform.

La présente invention concerne un procédé de récupération d'une forme d'onde représentant un code à barres linéaires, le procédé comprenant les étapes suivantes: le déplacement d'un dispositif de détection par rapport au code à barres, ledit dispositif de détection comportant un capteur d'images bidimensionnelles ; la capture, au moyen du capteur d'images, d'une pluralité d'images partielles bidimensionnelles dudit code à barres lors dudit déplacement ; la détermination, à partir d'au moins une des images, d'une direction sensiblement perpendiculaire aux barres du code à barres ; la détermination, sensiblement selon la direction, d'un fragment de forme d'onde correspondant à chaque image capturée ; la détermination d'un alignement entre chaque paire de fragments de forme d'onde ; et la récupération, à partir des fragments de formes d'onde alignés, de la forme d'onde.

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