Patent ID: 9087288
Filing Date: 2015-07-21
Classification: B41M,G06K,H04N

Abstract:
1. A method of generating a number of different void pantographs, the method comprising: (1) generating a dot pattern for a pantograph foreground by selecting from multiple combinations of dot size and dot placement on an X-Y grid; (2) generating a dot pattern for a pantograph background by selecting from multiple combinations of dot size and dot placement on an X-Y grid, wherein at least one of generating the pantograph foreground or generating the pantograph background includes combining two different dot patterns selected from the multiple combinations of dot size and dot placement on the X-Y grid prior to the at least one of the foreground dot pattern or the background dot pattern being printed; (3) varying either the pantograph foreground dot pattern or background dot pattern by changing dot placement and/or dot size while maintaining the other pantograph pattern static; (4) combining the foreground and background pattern to generate a void pantograph; and repeating steps (1) to (4) a plurality of times to generate a plurality of different void pantographs.