| 摘要 |
<p>A method for visually customising an identity document comprising a latent image formed from an array of single-colour portions distributed into a series of groups of identical single-colour portions, comprises steps which involve, for each pixel of a customisation image to be formed on the latent image, defining a segment extending over one of said groups of single-colour portions, each segment being formed from elementary areas in which shading can be generated with a level chosen from a plurality of possible shading levels so as to locally alter the appearance of the array in such a way as to reproduce, in said segment, said colour of the pixel of the customisation image, characterised in that, the portions having a dimension representing, at most, a multiple of the average dimension of these elementary areas, it involves generating, in at least some of the segments, successive levels of shading that are respectively defined by a pixel of the image to be reproduced and by at least one adjacent pixel in this image to be reproduced in a given position.</p> |
