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HANS – Unlocking New Print Control Alternatives By Bringing Color Separation And Halftoning Closer Together

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Color separation is currently used to decide how much of each available colorant to use for each printable color and halftoning then builds patterns that meet those choices. Print color, however, depends not only on how much of each colorant is used, but also on how those colorants are superimposed. Furthermore, there are many halftone patterns that correspond to a given combination of ink amounts. HANS (Halftone Area Neugebauer Separation), which we introduced at last year's IS&T's CIC conference, is a move towards specifying halftone pattern statistics and enables control over print properties beyond their current limits. While the benefits of HANS for color gamut and ink use efficiency have been shown, at this year's NIP, we would like to look more closely at how to determine the set of all possible halftone patterns that match a given color and demonstrate how access to such sets – metamer sets – benefits print control. We will also illustrate how even for a simple CMY ink set, which using current approaches leads to exactly one ink combination per printable color, there are sets of alternative halftone patterns that match a given color. Such sets in turn allow for tradeoffs to be made, e.g., between grain and ink use, even in this simple case.
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Document Type: Research Article

Publication date: 2011-01-01

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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