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Determining printer and scanner resolution dependency of text classification for digital image forensics

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Forensic identification of the hardware used during printing and image scanning is a technology of value for security printing, inspection and even criminal investigations. The more familiar image forensics are concerned with determining the operations that have been performed on a digital image—usually for identifying the camera model used to capture the image. When an image is both printed and scanned, however, the forensics task is more complicated, since the print-scan (PS) cycle introduces less specific effects on the images. In order to identify the printer used to produce and read an image, classification must be performed. In this paper, we use a multi-class Adaboost classifier to determine which of 6 printers, representing 3 inkjet and 2 laserjet models, was used to produce a later-scanned image. Our results, investigating 6 different English characters, show that classification accuracy continues to increase with scanning resolution up to 1200 pixels/inch. The results are character-dependent, suggesting that different characters may be used for different forensic purposes—printer model, cartridge and individual printer identification as examples.
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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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