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AssigneesDigimarc Corporation, Pitney Bowes Inc.
InventorsDonald G. Mackay, Claude Zeller, Robert A. Cordery, Hugh L. Brunk
Estimating the term…
A method for assigning unique printer resolutions or signatures, i.e., a unique number of dots per inch, to a class, or models of printers or lines of postage meters. The number of dots per inch or resolution may be specified within a image on a document or within a postal indicia and later checked to determine if the image on document or the postal indicia has the correct resolution. The foregoing would be able to detect an image or postal indicia that was scanned into a computer and printed with a printer that did not have the number of dots per inch specified in the image or postal indicia.
A method for determining whether an image on a substrate has a specified number of dots per inch, said method includes the steps of:
A method for printing an image on a substrate having a surface including a first axis and a second axis with a specified number of dots per inch in at least one of the first and second axes, the substrate moving in the direction of the first axis, said method comprising:
Dependencies are inferred from the claim text.