outputting a modified copy of a scanned original with additional data, e.g.
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Google Patents Method and system for generating a document having a layered void pantographÄownload PDF Info Publication number US8891136B2 US8891136B2 US13/810,687 US201013810687A US8891136B2 US 8891136 B2 US8891136 B2 US 8891136B2 US 201013810687 A US201013810687 A US 201013810687A US 8891136 B2 US8891136 B2 US 8891136B2 Authority US United States Prior art keywords pantograph document pattern test layer Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents US8891136B2 - Method and system for generating a document having a layered void pantograph US8891136B2 - Method and system for generating a document having a layered void pantograph