METHOD FOR GENERATING VARIABLE GUILLOCHE PATTERNS, IMPLEMENTING DEVICE AND IDENTIFICATION DOCUMENT COMPRISING SUCH PATTERNS

摘要

The invention relates to a method for generating 1 D guilloche patterns able to be affixed on a document, each guilloche pattern (201 -228) being able to encode variable alphanumeric data providing a different appearance to each guilloche pattern, the method comprising the following operations: formatting (420) alphanumeric data (410) to be encoded in the form of a predefined number of data blocks with a predefined size; generating a carrier function (430) comprising a plurality of parameters, the formatted data blocks forming at least one of the parameters; and modulating (450) the carrier function by the formatted data blocks so as to encode the alphanumeric data (410) graphically, each data block defining a guilloche pattern (201 -228), the number of data blocks (n) defining the number of guilloche patterns, the carrier function associated with a formatted data block is modulated locally, each datum of the block being encoded locally in the guilloche pattern, by interpolation of a predefined point associated with the carrier function.