Method for certifying a copy of a document such as a fax

Details Method for certifying a copy of a document such as a fax Method for certifying a copy of a document such as a fax

H - Electricity

04

N

H04N 1/387 (2006.01) H04N 1/32 (2006.01) H04N 1/42 (2006.01)

Patent

CA 2206135

A method for certifying copies of documents such as a faxes by processing an image of a reserved field (103) on the original document by condensing it and adding identification data. A set of bar codes is produced from the signal provided after processing, and printed in a space set aside for an identifying seal. The bar code columns are several scan lines long and the bar codes are printed as a series of rasters. The bar code may thus be scanned in spite of the distortion due to transmission, printing and reading.

L'invention concerne les procédés qui permettent de certifier des reproductions de documents, en particulier des télécopies. Elle consiste à traiter l'image d'une zone réservée (103) du document original en la comprimant et en y rajoutant des données d'identification. A partir du signal obtenu après traitement, on élabore un ensemble de codes-barres qui est imprimé dans un espace réservé à un sceau d'identification. La hauteur des colonnes de ces codes-barres est égale à plusieurs lignes d'analyse et les codes-barres sont imprimés sous la forme de plusieurs trames successives. De cette manière, on arrive à relire le code-barre en dépit des distorsions provenant tant de la transmission que de l'impression puis de la lecture.

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