DETERMINING A PRINTER'S SIGNATURE AND THE NUMBER OF DOTS PER INCH PRINTED

摘要

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 meter (37). The number of dots per inch or resolution may be specified within an image on a document or within a postal indicia (33) and later checked to determine if the image on document or the postal indicia (40) has the correct resolution. The foregoing would be able to detect an image or postal indicia (33) 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(40).