Patent ID: 11872834
Assignee: KOENIG & BAUER BANKNOTE SOLUTIONS SA
Field: Audio-visual technology (Electrical engineering)
Classification: CPC B  G  H | IPC B  G  H

Claim 0:
1. A method of designing a printed image in a security feature, the security feature comprising an array of optical elements overlaying the printed image, wherein the printed image comprises a two dimensional matrix of rows and columns of pixels, the method comprising:
calculating for each row and column at least one drift value, wherein the drift value for any pixel is equal to the difference between an actual position for said pixel and the desired position for said pixel;
determining, based on said at least one drift value, one or more locations in the printed image to remove a pixel from the printed image and/or to add a pixel to the printed image; and
adding or removing at least one pixel at the one or more locations;
wherein the one or more locations are determined by calculating a number of pixels to be removed from or added to the printed image and randomly selecting that number of locations.