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High Resolution Imaging for Forensics and Security

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Printing provides innate forensic capabilities useful for product security as a consequence of the microscopic stochastic nature of the printing process itself and ink/substrate interaction during printing. This is especially true for substrates with a high degree of surface roughness/porosity, such as office paper, recycled paper, cardstock and packaging. Further imperfections are incurred during high speed printing, which taxes the limitations of the printing processes. These imperfections, consistent with reduced print quality, can be used serendipitously to provide a unique identifier for any printed symbol. This paper describes the hardware design for an imaging device that can analyze, with 7600 lines/inch resolving capability over a relatively large field of view of 6.6 x 4.9mm, any printed mark—from character to glyph to outline of an image—with high mark specificity. Combined with image analysis software written to describe the interface, or boundary, between ink-covered and ink-free substrate, this device, dubbed the Dr. CID (Dyson Relay CMOS Imaging Device [1]), can provide simultaneous image authentication and forensics.
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Document Type: Research Article

Publication date: 01 January 2010

More about this publication?
  • For more than 30 years, IS&T's series of digital printing conferences have been the leading forum for discussion of advances and new directions in 2D and 3D printing technologies. A comprehensive, industry-wide conference that brings together industry and academia, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems?particularly those involved with additive manufacturing and fabrication?including bio-printing, printed electronics, page-wide, drop-on-demand, desktop and continuous ink jet, toner-based systems, and production digital printing, as well as the engineering capability, optimization, and science involved in these fields. In 2016, the conference changed its name formally to Printing for Fabrication to better reflect the content of the meeting and the evolving technology of printing.

    Please note: For purposes of its Digital Library content, IS&T defines Open Access as papers that will be downloadable in their entirety for free in perpetuity. Copyright restrictions on papers vary; see individual paper for details.

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