Patent ID: 8630445

Claim:
A hidden image method comprising forming a set of carrier devices which when overlayed upon one another and aligned will reveal N images within a common area, the set of carrier devices being formed by: forming N latent images from respective ones of the N images and respective ones of N line decoders to hide the N images, each latent image being decodeable by the decoder from which the latent image is formed to reveal the image the latent image hides, the N latent images further formed such that the lines of the decoders cross one another within the common area at line angles displaced relative to one another so as to define a single axis of alignment; and forming each carrier device of the set of carrier devices by combining at least two items selected from the set of latent images and decoders so as not to decode any of the hidden images and such that the set of carrier devices includes all the latent images and all the decoders, whereby the set of carrier devices will reveal the N hidden images within the common area when overlayed upon one another and aligned.