PROCEDE DE CERTIFICATION DE LA REPRODUCTION D'UN DOCUMENT, NOTAMMENT D'UNE TELECOPIE

摘要

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.