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Forensic analysis of individual printed items, including single characters, enables the addition of some level of security to any printed item (Label, Document, Package, etc.). This paper presents a model-based approach for extracting a signature profile around the outer edge of virtually any text glyph. The authors show that for two high-resolution imaging devices the Dyson Relay CMOS Imaging Device, called DrCID, and a high speed line-scan camera this signature encodes that part of the glyph boundary that is due to the random fluctuation of the print process, enabling significantly higher levels of forensic discrimination than previously shown.
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