Abstract: Provided is a security assembly including at least one substrate element, at least one first pattern, and at least one second pattern. The at least one first pattern is associated with the at least one substrate element. The at least one first pattern is at least in part translucent or transparent. The at least one second pattern is associated with the at least one substrate element. Each of the at least one first pattern overlaps at least in part the at least one second pattern. Upon viewing the assembly, the at least one first pattern and the at least one second pattern are configured to generate, at at least one side of the assembly, at least one third pattern, each of the at least one third pattern including an optically variable image. Other embodiments disclosed.

Abstract: A multipage security document has a first verification lens located in a see-through portion and corresponding to a first verification feature and a second verification lens collocated with the first verification lens as an adjacent layer to the first verification lens in the see-through portion and corresponding to a second verification feature. The multipage security document can contain a first sheet and a second sheet connected along one side to the first sheet such that the second sheet may be placed against the first sheet, the second sheet having a see-through portion. Other embodiments are disclosed.

Abstract: A method of superimposing a first image onto a second image, wherein each image is defined by a plurality of pixels is disclosed. The method includes changing target pixels of the second image corresponding in position to pixels of the first image to be superimposed on the second image. Changing target pixels of the second image includes changing the values of some of these target pixels of the second image to respective new values. Each new value is based on the original value of at least one pixel of the second image. A personalization method including such an image superimposing method and a data carrier thereby personalized are also disclosed.

Abstract: The invention relates to a secure identification document having two main surfaces (S1, S2; S3,S4) and at least one edge, and comprising at least two constitution layers (20,22; 24,26), said identification document allowing preventing any separation of its constitution layers, by delamination for example, said separation being otherwise immediately apparent. The solution of the invention relates to the fact that the at least one edge of the identification document is marked with written data (23; 27) that are etched into said edge by means of a laser beam, said written data overlapping said constitution layers (20,22;24,26; 32,33,34), in order to prevent a fraudulent delamination of said document.

Abstract: A method of superimposing a first image onto a second image, wherein each image is defined by a plurality of pixels is disclosed. The method includes changing target pixels of the second image corresponding in position to pixels of the first image to be superimposed on the second image. Changing target pixels of the second image includes changing the values of some of these target pixels of the second image to respective new values. Each new value is based on the original value of at least one pixel of the second image. A personalization method including such an image superimposing method and a data carrier thereby personalized are also disclosed.