We describe the application of a machine-vision based (ImageXpert) print quality analyzer to derive and identify unique print quality “signatures”. Test patterns generated by seven different state-of-the-art digital (ink jet and dry/liquid xerography) and impact (computer-to-plate
offset lithography) printing technologies were quantitatively analyzed in terms of a statistically meaningful number of lines, half-tone dots and text features. In every case examined it is possible to resolve a unique print quality
John Oliver, Joyce Chen, "Use of Signature Analysis to Discriminate Digital Printing Technologies" in Proc. IS&T Int'l Conf. on Digital Printing Technologies (NIP18), 2002, pp 218 - 222, https://doi.org/10.2352/ISSN.2169-4451.2002.18.1.art00055_1