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The Influence of Ink and Paper on Bar Code Print Quality and Readability with OCR Scanning Systems

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Postal operators worldwide use two-dimensional Data Matrix bar codes for machine-readable postage payment evidencing. Dynamic interaction of ink jet inks with uncontrolled media like envelope papers generates a variety of print quality defects. Adaptive thresholding algorithms optimized for OCR amplify the impact of these defects on the readability of two-dimensional bar codes. Print quality parameters are determined according to international standards for several combinations of monochrome franking ink jet inks and plain paper envelopes. The ink and paper characteristics relevant in generating the defects are measured and interpreted in terms of wetting and capillarity. We investigate, through computer simulation, the impact of the interaction of print quality defects and OCR adaptive thresholding algorithms on 2D bar code readability.
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Document Type: Research Article

Publication date: 2005-01-01

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  • 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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