Patent ID: 9275303
Filing Date: 2016-03-01
CPC Classification: G02B,G06K,G06T,G09C,H04N

Claim Text:
1. An automated method for constructing a composite image having an authentication image formed therein, the authentication image being viewable through a decoder lens having a plurality of lens elements defining one or more decoder lens frequencies, the method comprising: generating two gray-scale component images having tonal areas that are tonally balanced around at least one tonal value, at least one of the two gray-scale component images including a representation of the authentication image; determining a first pattern of the component image elements for the two gray-scale component images, the first pattern including a first element configuration and at least one element frequency that is equal to or a multiple of one of the decoder lens frequencies, the component image elements for a corresponding gray-scale component image collectively carrying content of the corresponding gray-scale component image; extracting at least a portion of the content from the component image elements of the two gray-scale component images; and constructing a composite image having a second pattern of composite image elements, the second pattern having a second element configuration that corresponds to the first element configuration, the second pattern having the at least one element frequency that is equal to or a multiple of one of the decoder lens frequencies, the composite image elements including the content extracted from the component image elements obtained from the two gray-scale component images.