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Descreening printer-ready images

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In this paper we address the problem of taking a bilevel image prepared for one printer, and processing it such that when it is printed on a second printer, the outputs of the two printers are as visually similar as possible. We present novel algorithms for this processing, which includes descreening and rehalftoning. The potential application for this algorithm is the printing of a digital image on a printer that is different from the one the image was originally formatted ror.

Our algorithm segments the image into text and halftone areas based on gradient density. The halftone areas are analyzed through their Fourier power spectra to yield their repetitive frequencies. A smoothing filter is chosen based on the repetitive frequency to perform descreening. This results in an intermediate gray level image, which is then rehalftoned using a technique suitable for the second printer.

We implemented this algorithm, and found that it works satisfactorily on several test images.
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Document Type: Research Article

Publication date: 1998-01-01

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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