Method of encoding a latent image

Details Method of encoding a latent image Method of encoding a latent image

B - Operations, Transporting

42

D

B42D 15/10 (2006.01) B44F 1/12 (2006.01)

Patent

CA 2529388

There is disclosed a method of encoding a latent image. The method comprises providing a latent image to be encoded, the latent image having a plurality of latent image elements, each latent image element having a visual characteristic which takes one of a predetermined set of values, providing a secondary pattern having a plurality of secondary image elements, the secondary pattern being capable of decoding the latent image once the latent image has been encoded, relating the latent image elements to the secondary image elements, and forming a primary pattern comprising a plurality of primary image elements which correspond to the secondary image elements displaced in accordance with the value of the visual characteristic of the latent image elements to which said secondary image elements are related.

La présente invention se rapporte à un procédé de codage d'une image latente. Le procédé consiste à (i) utiliser une image latente devant être codée, ladite image latente comportant une pluralité d'éléments d'image latente, chaque élément d'image latente ayant une caractéristique visuelle qui prend une valeur faisant partie d'un ensemble prédéterminé de valeurs; (ii) utiliser une structure secondaire ayant une pluralité d'éléments d'image secondaire, la structure secondaire étant capable de décoder l'image latente dès que l'image secondaire a été codée; (iii) relier les éléments d'image latente aux éléments d'image secondaire; et à (iv) former une structure primaire comprenant une pluralité d'éléments d'image primaire qui correspondent aux éléments d'image secondaire déplacés en fonction de la valeur de la caractéristique visuelle des éléments d'image latente auxquels sont reliés lesdits éléments d'image secondaire.

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